Question #4ca61

1 Answer
Dec 2, 2017

a) 3,4-dimethyl-7-ethyl-dec-5-yne (maybe)

b) 2-propyl-1,3-diene (maybe)

Explanation:

The first molecule nomenclature is ignoring the size of the sec-butyl substituent, so the skeleton of this molecule should be 10 atoms instead of 8. I would try:
3,4-dimethyl-7-ethyl-dec-5-yne

I think the methylene is indeed a double bound. I would use

2-propyl-1,3-diene