What is the IUPAC name of the following compound?
CH3-CH-C---C-CH2-CH-CH3
CH3-CH2 CH2-CH3
(a) 2,6-diethyl-3-nonyne
(b) 2,5-diethyl-3-nonyne
(c) 3,7-dimethyl-5-nonyne
(d) 3,7-dimethyl-4-nonyne
(e) 2,6-diethyl-3-heptyne

In this case, considering the attached picture on which you can see that the main chain has nine carbon atoms, one tripe bond at the fourth carbon and two methyl radicals at the third and seventh carbons respectively, by following the IUPAC rules, the name would be: (d) 3,7-dimethyl-4-nonyne since the chain must start at the side closest to the first triple bond due to its priority and subsequently considering the present radicals.

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What is the IUPAC name of the following compound? CH3-CH-C---C-CH2-CH-CH3 CH3-CH2 CH2-CH3 (a) 2,6-diethyl-3-nonyne (b) 2,5-diethyl-3-nonyne (c) 3,7-dimethyl-5-nonyne (d) 3,7-dimethyl-4-nonyne (e) 2,6-diethyl-3-heptyne

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What is the IUPAC name of the following compound?
CH3-CH-C---C-CH2-CH-CH3
CH3-CH2 CH2-CH3
(a) 2,6-diethyl-3-nonyne
(b) 2,5-diethyl-3-nonyne
(c) 3,7-dimethyl-5-nonyne
(d) 3,7-dimethyl-4-nonyne
(e) 2,6-diethyl-3-heptyne