What is the name of the following compound?
(A) 1,2-difluoro-1-chloroethane
(B) 1,2-difluoro-2-chloroethane
(C) 1-chloro-1,2-difluoroethane
(D) 2-chloro-1,2-difluoroethane - HSC - SSCE Chemistry - Question 13 - 2005 - Paper 1
Question 13
What is the name of the following compound?
(A) 1,2-difluoro-1-chloroethane
(B) 1,2-difluoro-2-chloroethane
(C) 1-chloro-1,2-difluoroethane
(D) 2-chloro-1,2-difluor... show full transcript
Worked Solution & Example Answer:What is the name of the following compound?
(A) 1,2-difluoro-1-chloroethane
(B) 1,2-difluoro-2-chloroethane
(C) 1-chloro-1,2-difluoroethane
(D) 2-chloro-1,2-difluoroethane - HSC - SSCE Chemistry - Question 13 - 2005 - Paper 1
Step 1
Identify the Structure of the Compound
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Answer
The compound has two fluorine atoms and one chlorine atom attached to a two-carbon chain. Each carbon atom is bonded to hydrogen atoms in addition to the halogens.
Step 2
Determine the Locants for the Halogens
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Answer
Starting from the end of the carbon chain that gives the first substituent (chlorine) the lowest possible number, assign locants:
The chlorine is on the first carbon (C-1).
The fluorines are on the first and second carbons (C-1 and C-2).
Step 3
Compile the Name of the Compound
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Answer
Following the IUPAC naming conventions, the name should include the substituents in alphabetical order: the name of the compound is 1-chloro-1,2-difluoroethane.
Step 4
Select the Correct Option
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Answer
From the given options, the correct name is (C) 1-chloro-1,2-difluoroethane.
