Hunsdiecker Reaction

Explore the intriguing world of the Hunsdiecker Reaction, a cornerstone of organic chemistry. You will discover the basics, meaning, and various applications of this fascinating reaction. This article delves into detailed case studies and practical examples, while also unveiling the mechanism behind it. Additionally, the insightful comparative analysis of the Hunsdiecker and the Hunsdiecker-Borodin reactions adds another layer of depth to your understanding of chemistry. Unlock the secrets of the Hunsdiecker Reaction and enhance your knowledge on this vital topic.

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    Understanding the Hunsdiecker Reaction

    When discussing the fascinating world of chemistry, you're likely to come across the term Hunsdiecker Reaction. It is a fundamental chemical reaction widely used in the synthesis of carbon-carbon bonds, a backbone in organic chemistry.

    The Hunsdiecker Reaction is an organic reaction whereby silver salts of carboxylic acids are transformed into chlorides and produce a carbon chain shortened by one carbon atom.

    The Basis of the Hunsdiecker Reaction

    The Hunsdiecker Reaction represents a method for the decomposition of silver salts of carboxylic acids into alkanes and carbon dioxide. The reaction pathway involves several crucial steps:

    • The carboxylic acid is first converted into its silver salt.
    • The silver salt is then oxidised by halogen, and it decomposes.
    • Lastly, the chain is shortened by one atom, and carbon dioxide is eliminated.

    This reaction was originally discovered by Alexander Borodin in 1861, but it was later elaborated on by Heinz Hunsdiecker and his wife Cläre Hunsdiecker, after whom it is named.

    The overall balanced chemical equation for the Hunsdiecker Reaction demonstrating the production of chlorobenzene from benzoic acid can be represented as follow:

    \[ \text{C}_6\text{H}_5\text{COOH} + \text{Ag}_2\text{O} + \text{Cl}_2 \rightarrow \text{C}_6\text{H}_5\text{Cl} + 2\text{AgCl} + \text{CO}_2 + \text{H}_2\text{O} \]

    Essentials of the Hunsdiecker Reaction

    In terms of practical applications, the Hunsdiecker Reaction was extensively used in the development of pharmaceuticals and pesticides among other synthetic materials. A key advantage of this reaction is its ability to convert carboxylic acids, abundant and renewable resources, into valuable halogenated products.

    Property Value
    Type of reaction Decarboxylation
    Related reactions Koch–Haaf reaction, Hell–Volhard–Zelinsky reaction
    First reported by Alexander Borodin
    Namesake Heinz and Clare Hunsdiecker

    An intriguing example of the Hunsdiecker Reaction is the synthesis of bromoform (CHBr3), a compound used as a solvent for oils, waxes, and resins. It is prepared using the reaction from silver acetate (CH3COOAg) and bromine (Br2).

    The beauty of the Hunsdiecker Reaction lies in its simplicity and its ability to utilise straightforward and inexpensive starting materials to generate complex molecules. Further, it offers chemists the unique opportunity to manipulate and finely tune the creation of new and exciting compounds.

    Unpacking the Hunsdiecker Reaction Meaning

    One of the fascinating aspects of chemistry is the journey of unearthing the meaning and implications of new reactions. In the vast spectrum of organic reactions, the Hunsdiecker Reaction stands as a classic example. Essentially, the Hunsdiecker Reaction can be understood as an organic reaction that pivots on the transformation of silver salts of carboxylic acids into halides, resulting in a carbon chain shortened by one carbon atom.

    Depicting the Hunsdiecker Reaction Meaning

    The Hunsdiecker Reaction is not merely a simple chemical reaction, but an intriguing symphony of molecular transformations. It begins with the clever conversion of a carboxylic acid into its silver salt. This is achieved by reacting the targeted carboxylic acid with silver carbonate, which results in the formation of silver salt.

    In the second phase of the dance, the obtained silver salt is oxidised by a halogen. This step is critical as it causes the silver salt to break apart or decompose.

    Finally, the carbon chain is shortened by eliminating one carbon atom. This reduced carbon chain is then expressed in the form of a symphony of halides and carbon dioxide.

    In a representative chemical notation, it is presented as:

    \[ \text{RCOOAg} + \text{X}_2 \rightarrow \text{R'X} + \text{CO}_2 + \text{AgX} \]

    In this equation, R is the alkyl group, X is the halogen, R' is the alkyl group shortened by one carbon atom, and AgX is the silver halide.

    Comprehensive Perspective on Hunsdiecker Reaction Meaning

    The Hunsdiecker Reaction not only carries scientific interest but also historical significance. It was first reported by Alexander Borodin, a Russian chemist, but the thorough research and extensive detailing of the reaction were carried out by Heinz Hunsdiecker and his wife, Cläre Hunsdiecker. That is why this reaction bears the name "Hunsdiecker Reaction".

    From an application-oriented perspective, this unique reaction has been employed in various fields, notably the development of pharmaceuticals and pesticides. This is because the conversion offered by the Hunsdiecker Reaction allows abundant and renewable resources like carboxylic acids to be transformed into valuable halogenated products.

    Integral to the understanding of the Hunsdiecker Reaction is the appreciation of its balance, its elegant transformation from a relatively simple starting material to a more complex end product, which withstands the test of scientific integrity and usefulness in the chemical industry.

    Variations in the Hunsdiecker Reaction Meaning

    It is also worth noting that there have been variations or modifications of the Hunsdiecker Reaction over time, showcasing the versatility and adaptability of this process. One such variation is the Koch-Haaf Reaction, where carboxylic acids are transformed directly into their corresponding acid bromides.

    Another instance is the Hell–Volhard–Zelinsky reaction, which is an organic reaction used to convert a carboxylic acid to a halomethyl ketone. Each variation of the Hunsdiecker Reaction adds another level of depth and understanding to this beautifully choreographed molecular dance.

    Buried within each of these reactions, the spirit of the Hunsdiecker Reaction, with its clever use of resources and its elegant simplification of complex transformations, continues to inspire and pave the way for exciting new advancements in the realm of organic chemistry.

    Exploring Hunsdiecker Reaction Examples

    It is often said that examples help us understand theoretical concepts better. The Hunsdiecker Reaction, an intricate part of organic chemistry, can be best apprehended when broken down into specific examples. Looking closely at how this reaction works in various scenarios helps in gaining a more profound understanding of its mechanics.

    Study of Different Hunsdiecker Reaction Examples

    A positive approach towards the learning of chemical reactions lies in the study of different examples that provide a practical insight into how they work. To understand the Hunsdiecker Reaction in all its vastity, consider a wide range of examples.

    The unique silver salt used in the Hunsdiecker Reaction can be in many forms. For example, the reaction of silver benzoate with bromine. In this case, the silver carboxylate used is silver benzoate, and the halogen applied is bromine. The result of this reaction is the formation of a bromobenzene with carbon dioxide and silver bromide produced as byproducts.

    In this equation, in pure LaTeX formatting, it would look as follows: \[ \text{C}_7\text{H}_5\text{COOAg} + \text{Br}_2 \rightarrow \text{C}_6\text{H}_5\text{Br} + \text{CO}_2 + \text{AgBr} \]

    Another interesting example is the reaction of Silver Propionate with Chlorine, where silver propionate reacts with chlorine gas, providing a chloropropane. The reaction scheme would look like this:

    \[ \text{CH}_3\text{CH}_2\text{COOAg} + \text{Cl}_2 \rightarrow \text{CH}_2\text{CH}_2\text{Cl} + \text{CO}_2 + \text{AgCl} \]

    Case Studies: Hunsdiecker Reaction Examples

    Moving beyond individual instances, let us dig deeper into the practical illustrations of the Hunsdiecker Reaction. Various case studies illustrate how the reaction takes place in different situations, furthering our understanding of this chemical reaction.

    Consider the pharmaceutical industry, where the Hunsdiecker Reaction has been used extensively, especially in the synthesis of certain drugs. A vital component in drug manufacturing, the reaction is employed in producing organic compounds that are critical to drug development.

    Erythromycin, an antibiotic widely used to treat bacterial infections, is one such example. By utilising the Hunsdiecker Reaction, various halogenated derivatives of Erythromycin are made, enhancing the drug's antibiotic properties.

    Another noteworthy case lies in the field of pesticide manufacturing. The reaction helps in producing various halogenated organic compounds that make for effective pesticides. These pesticides, once synthesized, can then be used to protect crops from harmful pests.

    An example here is the production of the pesticide, chloropicrin. This is achieved through the Hunsdiecker Reaction by reacting trichloronitromethane with silver acetate, which results in the formation of the pesticide with the release of carbon dioxide and silver nitrate.

    In the chemical equation, it would be represented like this:

    \[ \text{CCl}_3\text{NO}_2 + \text{CH}_3\text{COOAg} \rightarrow \text{CCl}_3\text{NO}_2 + \text{AgNO}_3 + \text{CO}_2 \]

    The above examples and case studies show that the Hunsdiecker Reaction has a wide range of examples and case studies where it is applied, showcasing its versatility and relevance in various fields. These case studies further elucidate the importance of this organic reaction not just in an academic sense, but also in understanding its industrial and practical applications.

    Practical Hunsdiecker Reaction Applications

    Despite its relatively simple base, the Hunsdiecker Reaction holds powerful applications. Its utility ranges from the synthesis of pharmaceutical products to the creation of efficient pesticides. The beauty of this reaction lies not only in its elegant mechanics but also its far-reaching practical implications.

    Examination of Hunsdiecker Reaction Applications

    A deep dive into the practical applications of the Hunsdiecker Reaction exemplifies its crucial role in day-to-day chemistry. Here, we look at its application in two major industrial sectors namely, the pharmaceutical industry and the agricultural sector.

    In the pharmaceutical industry, the Hunsdiecker Reaction is commonly used in synthesising organic compounds, which serves as the basis for numerous medicines. For instance, Halogenated derivatives of the drug erythromycin, a widely used antibiotic, can be produced using this reaction. Further, the Hunsdiecker Reaction forms the basis for the synthesis of other important pharmaceutical compounds as well.

    Let's explore an everyday occurrence. A doctor prescribes erythromycin to a patient suffering from a bacterial infection. The medicine consumed by the patient is a product of the Hunsdiecker Reaction – without this crucial chemical process, the antibiotic couldn't have been created, and the patient couldn't have been treated.

    Moving to the agricultural sector, the Hunsdiecker Reaction aids in the production of effective pesticides. By facilitating the synthesis of halogenated organic compounds, this reaction allows for the easy creation of substances lethal to pests. For instance, the pesticide chloropicrin is a product of this reaction.

    Imagine a crop field infested with pests. The farmer uses a pesticide to eliminate these pests, preserving the health of his crops and ensuring a successful harvest. The pesticide used in this situation could very well have been synthesized through the Hunsdiecker Reaction, showcasing the reaction's wide-ranging impact.

    Usage of Hunsdiecker Reaction in Everyday Chemistry

    The Hunsdiecker Reaction's importance extends beyond the laboratory, seeping into everyday life scenarios. The beauty of this reaction lies in its ubiquity – it's all around us, even if we might not directly perceive it.

    The reaction’s importance in daily life can be seen through its fundamental role in the production of several everyday materials. For example, the Hunsdiecker Reaction forms the basis for the synthesis of PVC (polyvinyl chloride) materials, which are ubiquitous in construction and crafting industries.

    Consider the PVC piping fitted in your house, or maybe the PVC crafting materials your kids use for their school projects. Without the Hunsdiecker Reaction, the production of these common PVC materials would be impossible.

    Beyond PVC materials, this reaction also plays a crucial role in the production of certain types of plastics. Plastics like CFCs (chlorofluorocarbons) are often made using processes dependent on this reaction. While the use of CFCs has diminished due to environmental concerns, they still find usage in various areas, showcasing the reaction’s importance.

    Plenty of items around you, from the plastic pens you use, the remotes for your televisions, to the containers holding your packed food – all these could be products of the Hunsdiecker Reaction. Although this might seem surprising, it further exemplifies the pervasive influence of this reaction in our daily lives.

    Overall, the Hunsdiecker Reaction's fascinating complexity, historical significance, wide-ranging applications, and its everyday implications truly underline its importance in the world of chemistry.

    The Hunsdiecker Reaction Mechanism Explained

    When diving into the Hunsdiecker Reaction, understanding its mechanism offers an essential framework. This process, integral for synthesising haloalkanes from silver or thallium salts, encompasses a three-step sequence that's both intriguing and educationally rewarding.

    Unveiling the Hunsdiecker Reaction Mechanism

    The fundamental pillars of the Hunsdiecker Reaction mechanism include a series of steps that shuck away complexity to reveal the essence of this vital process.

    The initiation of the Hunsdiecker Reaction begins with a halogenation process. This involves the addition of a halogen like chlorine or bromine to the silver carboxylate compound. The addition of the halogen generates a relatively unstable silver carboxylate halogen molecule.

    In the world of LaTeX equations, this phase can be represented as follows: \[ \text{RCOOAg} + \text{X}_2 \rightarrow \text{RCOOX} + \text{AgX} \] Where: - \( \text{R} \) represents the alkyl group, - \( \text{COOAg} \) indicates the silver carboxylate component, - \( \text{X}_2 \) signifies the halogen, and - \( \text{AgX} \) denotes the formation of silver halides.

    For instance, consider an example where the alkyl group is methyl (CH3), and the halogen used is bromine (Br2). The representation would look like this:

    \[ \text{CH}_3\text{COOAg} + \text{Br}_2 \rightarrow \text{CH}_3\text{COOBr} + \text{AgBr} \]

    The second phase of the Hunsdiecker Reaction is decarboxylation, which witnesses the breaking down of the unstable molecule formed in the first step. This results in the creation of the desired haloalkane compound as well as the release of carbon dioxide.

    Again, in LaTeX equations, this stage can be scribed as: \[ \text{RCOOX} \rightarrow \text{RX} + \text{CO}_2 \] Where: - \( \text{RX} \) denotes the haloalkane product, and - \( \text{CO}_2 \) signifies the release of carbon dioxide.

    If we go back to our earlier example with the methyl group and bromine, the equation of the decarboxylation step would be:

    \[ \text{CH}_3\text{COOBr} \rightarrow \text{CH}_3\text{Br} + \text{CO}_2 \]

    Detailed Study of the Hunsdiecker Reaction Mechanism

    A thorough examination of the Hunsdiecker Reaction mechanism further elucidates the finer details of this complex procedure.

    For starters, it's essential to highlight why the reaction employs silver carboxylates instead of typical acids while preparing for the reaction. Silver carboxylate salts are known to have remarkable reaction efficiencies when paired with halogens, thereby making them the preferred choice.

    In addition to the nature of the chemicals used in the reaction, the temperature also plays a crucial role in the Hunsdiecker Reaction. A carefully controlled temperature ensures that during the halogenation step, the reaction pace maintains a balance - fast enough to keep the reaction brimming but slow enough to prevent it from getting prematurely exhaustive.

    The second phase, decarboxylation, marks a pivotal turning point in the sequence. The process is unique to this reaction as it leads to the generation of the prime output - the haloalkane - and the liberation of carbon dioxide. The carbon dioxide thus released witnesses an immediate escape into the surrounding as a gas, driving the reaction's progression in the direction of the product formation

    A fascinating nuance to note here is the fact that this reaction is an exception to Markovnikov's Rule. Unlike other similar reactions, the Hunsdiecker Reaction forms an anti-Markovnikov product, meaning the halogen attaches itself to the most hydrogen-rich carbon in the compound.

    To sum up, the intricacies involved in each step of the Hunsdiecker Reaction mechanism cast a new light on this cardinal technique. By considering the choice of reagents, the movement from halogenation to decarboxylation, and the violation of Markovnikov's rule, we uncover the attributes that truly make this reaction stand out in the realm of organic chemistry.

    Delving into the Hunsdiecker-Borodin Reaction

    When exploring the realm of organic chemistry, the Hunsdiecker-Borodin Reaction, an intriguing variant of the Hunsdiecker Reaction, occupies an essential position. Providing a realistic observation of molecular evolution, this reaction accentuates the diversified chemical landscapes unveiled by different applications of carboxylic acids.

    Significance of the Hunsdiecker-Borodin Reaction

    The Hunsdiecker-Borodin Reaction, established by Alexander Borodin long before the discovery of the original Hunsdiecker Reaction, is recognised for its unique mechanistic approach. It reveals a notable pathway for the conversion of aliphatic carboxylic acids to haloalkanes, essentially promoting a reduction in carbon count. This aspect enables the innovative application of this reaction in various industries, thereby underlining its absolutely pure importance.

    Appreciating the Hunsdiecker-Borodin Reaction fundamentally involves understanding the reaction mechanics which promote the direct conversion of aliphatic carboxylic acids to alkyl halides. This process requires the carboxylic acid to first form a silver carboxylate which can react with a halogen, generating the resultant alkyl halide.

    In LaTeX equations, this would be represented as such: \[ \text{RCOOH} + \text{Ag}_2\text{O} + \text{X}_2 \rightarrow \text{RX} + \text{AgX} + \text{H}_2\text{O} + \text{CO}_2 \] Here: - \( \text{RCOOH} \) stands for the carboxylic acid, - \( \text{Ag}_2\text{O} \) denotes silver oxide, - \( \text{X}_2 \) represents the halogen - \( \text{RX} \), \( \text{AgX} \), \( \text{H}_2\text{O} \), and \( \text{CO}_2 \) indicate the products formed.

    Beyond the formula, the actual worth of the Hunsdiecker-Borodin Reaction lies in its ability to cater to multifaceted applications. Particularly, the process is valuable in industrial circles that profit from carbon-chain shortening strategies. Industries involved in the production of synthetic polymers, petrochemical products, and various categories of plastics find the reaction highly advantageous.

    Comparative Analysis: Hunsdiecker and Hunsdiecker-Borodin Reaction

    Though the Hunsdiecker and Hunsdiecker-Borodin Reaction steer towards a common goal of creating haloalkanes, they differ discernibly in terms of starting materials and the overall reaction. A closer examination reveals subtle nuances that distinguish these two closely related chemical reactions.

    • Starting Materials: While the Hunsdiecker Reaction begins with silver carboxylate salts, the Hunsdiecker-Borodin Reaction uses aliphatic carboxylic acids instead. This subtle basic deviation significantly drives each reaction's distinct mechanistic approach.
    • Reaction Mechanism: The two reactions further show variance in their reaction path. The Hunsdiecker Reaction distinctly involves a silver carboxylate that undergoes halogenation, then subsequently decarboxylation. On the other hand, the Hunsdiecker-Borodin Reaction begins directly with the carboxylic acid, skipping the silver carboxylate formation.

    Given the above distinctions, a comparison of the two reactions using a table appears as follow:

    Parameter Hunsdiecker Reaction Hunsdiecker-Borodin Reaction
    Starting Materials Silver Carboxylate Aliphatic Carboxylic Acids
    Reaction Mechanism Begins with silver carboxylate, follows a process of halogenation and decarboxylation Begins directly with carboxylic acid, includes a comparative step of halogenation and decarboxylation, but omits the formation of silver carboxylate

    While both reactions showcase the power and versatility of organic chemistry, the choice of application often tends to be industry-specific. Factors such as efficiency, cost-effectiveness, and desired level of carbon-chain shortening decide whether a particular industry would prefer the Hunsdiecker Reaction or its Borodin variant.

    Still, irrespective of distinctions, both reactions uphold a common scientific truth – the dynamic nature of chemistry, that allows for ongoing exploration, discovery, and reinvention, thereby underlining the exquisite science that binds the universe together.

    Hunsdiecker Reaction - Key takeaways

    • The Hunsdiecker Reaction is an organic reaction that was first reported by a Russian chemist, Alexander Borodin, and further studied by Heinz Hunsdiecker and Cläre Hunsdiecker.
    • The reaction is utilised in various fields such as the development of pharmaceuticals and pesticides, transforming carboxylic acids into valuable halogenated products.
    • There are variations of the Hunsdiecker Reaction, including the Koch-Haaf Reaction and the Hell–Volhard–Zelinsky reaction.
    • Examples of the Hunsdiecker Reaction include the reaction of silver benzoate with bromine and the reaction of Silver Propionate with Chlorine.
    • The Hunsdiecker Reaction is used extensively in the pharmaceutical industry, notably in the production of the antibiotic Erythromycin and in the synthesis of pesticides like chloropicrin.
    • Other applications of the Hunsdiecker Reaction include the production of PVC materials and certain types of plastics, such as CFCs (chlorofluorocarbons).
    • The Hunsdiecker Reaction mechanism involves halogenation and decarboxylation processes, resulting in the formation of a desired haloalkane compound and the release of carbon dioxide.
    • The reaction uses silver carboxylates instead of typical acids because of their remarkable reaction efficiencies when paired with halogens, and also requires carefully controlled temperature for an efficient reaction pace.
    • The reaction is an exception to Markovnikov's Rule, forming an anti-Markovnikov product where the halogen attaches itself to the most hydrogen-rich carbon in the compound.
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    Frequently Asked Questions about Hunsdiecker Reaction
    What is the Hunsdiecker Reaction? Write in UK English.
    The Hunsdiecker Reaction is a named reaction in organic chemistry, used to convert carboxylic acids to the corresponding alkyl halides. Essentially, it involves the decarboxylation and halogenation of a silver carboxylate. It was first discovered by the Hunsdiecker family in the 1930s.
    What is an example of a Hunsdiecker Reaction? Write in UK English.
    An example of a Hunsdiecker Reaction is the bromination of silver benzoate. In this reaction, silver benzoate reacts with bromine to produce benzoyl bromide, by cleavage of the carbon-carbon bonds in the silver benzoate molecule.
    What is the mechanism of the Hunsdiecker Reaction? Please write in UK English.
    The Hunsdiecker Reaction mechanism involves the oxidation of a silver carboxylate by a halogen to create an unstable intermediate. This intermediate then undergoes decarboxylation to produce a carbon-halogen bond, releasing carbon dioxide and a silver halide as byproducts.
    Which of the following can be prepared by the Hunsdiecker Reaction? Write in UK English.
    In Hunsdiecker Reaction, one can prepare halocarbons (like bromocarbons or chlorocarbons) from carboxylic acids. Additionally, it can also result in the formation of carbon dioxide and a halogen atom.
    What is the Hunsdiecker Reaction of benzoic acid in UK English?
    The Hunsdiecker Reaction of benzoic acid involves the conversion of benzoic acid to benzyl chloride upon treatment with thionyl chloride (SOCl2) followed by silver nitrate (AgNO3), with carbon dioxide (CO2) and silver chloride (AgCl) as by-products.
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