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Which of the following names are correct as per IUPAC norms? 2,6,6-trimethyloctane 3,3,7-trimethyloctane Pent-4-en-2-yne Diethyl ether

Which of the following names are correct as per IUPAC norms?
  1. 2,6,6-trimethyloctane
  2. 3,3,7-trimethyloctane
  3. Pent-4-en-2-yne
  4. Diethyl ether


3 Answers

Havishma Haranath
32 Points
7 years ago
The second compound would be the right answer as first one and the third violates the lowest sum rule and the last one is a common name.
Harihara Narayanan
16 Points
7 years ago
Lowest locant rule is violated in compunds one and third,fourth is common name and not IUPAC name,hence second compound is the correct answer
40 Points
7 years ago
3 and 4 are incorrect. But in case of 1& 2, 1 is given correct in a book reasoning first locant (here methyl group) should get lowest number (3) whereas in 2nd first locant gets 3 which is greater than 2. hence 1 is correct.
Also 2 is given correct in another book reasoning lowest sum rule (3+3+7
But I think 2nd is the correct naming.
Which of the above explanation is correct?

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