Classes Of Functional Groups
Organic Chemistry deals mostly with carbon and hydrogens, also called hydrocarbons, but those groups which replace hydrogen and bonds with carbon to give a characteristic nature, unique of their own, to the hydrocarbon they are attached to, are called functional groups. All the compounds belonging to a functional group undergo reactions in a similar pattern and are known to have similar physical and chemical properties.
Characteristics Of Functional Groups
In organic chemistry, we encounter a number of special substituent groups which are attached to the hydrocarbon backbone. These groups impart certain characteristics to the molecule of which it is a part of and thus, become the highlight of that particular molecule.
IUPAC Nomenclature
In Chemistry, IUPAC stands for International Union of Pure and Applied Chemistry which suggested a systematic naming approach for the organic and inorganic compounds, as in the beginning stage of nomenclature one single chemical compound was named in many ways by which lead to confusion. The need for this approach aroused as the number of chemical compounds newly discovered were increasing (approximately 32 million compounds) and the basic concept of nomenclature i.e. the trivial nomenclature and the derived system of nomenclature failed to overcome the challenge. It is an important task to name a chemical compound systematically and unambiguously which reduces lots of confusion about the newly reported compounds.
![**Problem 33 of 50: Electron-Pushing in Reactions**
Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic steps.
Be sure to account for all bond-breaking and bond-making steps.
**Instructions:**
- **Diagram Explanation:** The initial diagram shows a molecule with a bromine (Br) atom bonded to a carbon chain. The reagent, CH₃ONa in CH₃OH, is used with heat. The final product is not specified in the text but would show the result of the reaction.
- **Interactive Feature:** There is a prompt to "Select to Add Arrows," which likely indicates an interactive element where curved arrows can be placed to demonstrate electron flow.
- **Reagents and Conditions:** The reaction involves sodium methoxide (CH₃ONa) in methanol (CH₃OH) under heat, which typically suggests a substitution or elimination reaction.
Ensure to visualize and account for the movement of electrons, particularly those involved in bond-breaking (e.g., C-Br bond) and bond-making processes (e.g., C-O bond formation).
**Note:** Electron-pushing (curly arrow) notation is essential in understanding organic reaction mechanisms, showing how electrons are transferred or shared during chemical processes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F083854d5-9571-4a34-84bb-4b781be4a0c1%2F015655a0-28a8-4d47-88f3-0d9a730f0673%2F4qikq6_processed.jpeg&w=3840&q=75)
![**Problem 33 of 50**
In this exercise, you're given a chemical reaction mechanism to explore the modification of a molecule through substitution processes. The reaction begins with a brominated alkane and involves the addition of sodium methoxide in methanol under heat.
**Diagram Explanation:**
1. **Initial Structure**: The first frame shows a brominated alkane with sodium methoxide (Na⁺ OCH₃⁻) approaching. The alkane has a bromine (Br) atom attached to one of its carbon atoms. This is the substrate for a substitution reaction.
2. **Intermediate Step**: The instructions indicate "Select to Add Arrows," implying a mechanism where you identify the flow of electrons. Sodium methoxide is a nucleophile ready to attack the electrophilic carbon atom attached to bromine.
3. **Reaction Conditions**: Below the initial setup, it specifies the presence of CH₃ONa (sodium methoxide) and CH₃OH (methanol) along with heat. These conditions facilitate a nucleophilic substitution reaction.
4. **Final Structure**: The outcome is shown at the bottom. It details the new molecular structure where Br⁻ leaves, replaced by the OCH₃ group, forming a methoxy alkane. The diagram also shows Na⁺ and Br⁻ as separated ions.
This entire sequence demonstrates a classic SN2 reaction mechanism, where the nucleophile attacks and displaces the leaving group in a single concerted step.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F083854d5-9571-4a34-84bb-4b781be4a0c1%2F015655a0-28a8-4d47-88f3-0d9a730f0673%2Fq5ecyp_processed.jpeg&w=3840&q=75)
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