Using Cahn-Ingold-Prelog rules, rank these substituents from highest priority to lowest priority. A) III > I > II B) II > I > III C) III > II > I D) II > III > I E) I > II > III
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.
![The image displays three chemical structures labeled I, II, and III. Here's a detailed transcription and explanation for educational purposes:
### Structure I:
- This molecule includes a hydroxyl group (OH) attached to a chain of carbons.
- The wavy lines on either side suggest the continuation of the carbon chain, indicating unspecified alkyl groups or connections to other structures.
### Structure II:
- A carbonyl group (C=O) is present, signifying this structure as an aldehyde or other carbonyl-containing compound.
- Similarly, wavy lines on both ends denote continuation or unspecified connections to other molecular segments.
### Structure III:
- Displays a thiol group (SH) attached to a carbon chain.
- Again, the continuation of the carbon chain is indicated by wavy lines on either side.
These structures are commonly encountered in studies of organic chemistry, illustrating different functional groups like hydroxyl, carbonyl, and thiol, each with distinct chemical properties and reactivity patterns.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8f844d00-6c5e-468b-9347-2d727432be7a%2Fccc13f3b-dead-4e42-adc2-3c172d2d731c%2Fo9lyzwl_processed.png&w=3840&q=75)
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