Textbook Question
The following names are all incorrect or incomplete, but they represent real structures. Draw each structure and name it correctly.
a. 2-ethylpentane
b. 3-isopropylhexane
932
views
4. Alkanes and Cycloalkanes
Alkyl Groups
5:25 minutesProblem 13c,d
Textbook Question
Give each substituent on the ten-carbon chain a common name and a parenthetical name
c. 
d. 
Verified step by step guidance1
Step 1: Identify the longest continuous carbon chain in the molecule. This will be the parent chain, and in this case, it is a ten-carbon chain.
Step 2: Number the carbon atoms in the parent chain starting from the end nearest to the first substituent. This ensures the lowest possible numbers for the substituents.
Step 3: Identify each substituent attached to the parent chain. Common substituents include alkyl groups like methyl (CH₃), ethyl (C₂H₅), propyl (C₃H₇), etc.
Step 4: Assign a common name to each substituent based on its structure. For example, a CH₃ group is commonly known as a 'methyl' group.
Step 5: Provide a parenthetical name for each substituent, which typically involves the number of carbon atoms in the substituent followed by '-yl'. For example, a two-carbon substituent is named 'ethyl' and parenthetically as '(C₂H₅)'.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
5mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Substituents in Organic Chemistry
Substituents are atoms or groups of atoms that replace hydrogen atoms in a hydrocarbon chain. They can significantly influence the chemical properties and reactivity of the molecule. Common examples include alkyl groups, halogens, and functional groups. Understanding how to identify and name these substituents is crucial for proper nomenclature.
Recommended video:
Guided course
00:56
What is an organic molecule?
IUPAC Nomenclature
The International Union of Pure and Applied Chemistry (IUPAC) provides a systematic method for naming organic compounds. This includes rules for identifying the longest carbon chain, numbering the chain, and naming substituents based on their position. Familiarity with IUPAC nomenclature is essential for accurately conveying the structure of organic molecules.
Recommended video:
Guided course
03:43The different parts of an IUPAC name
Common vs. Parenthetical Names
In organic chemistry, common names are often simpler and more widely recognized, while parenthetical names follow IUPAC rules and provide a systematic description of the compound. For example, 'ethyl' is a common name, while 'ethane' is its parenthetical name. Understanding the distinction between these naming conventions is important for clear communication in chemical literature.
Recommended video:
Guided course
06:06Monosaccharides - Common Structures
Related Videos
Related Practice