What 1H coupling patterns (singlets, doublets, triplets,etc) would you expect from the following compounds?

Question

#C_1-CH_2-CH_2-CH_2-C_1#
#(CH_3)_2-CH-CO-CH_3#

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Answer 1 · 2016-06-25T16:47:43

For the alkyl chain, I would expect a mess. For the carbonyl, a doublet (6H), a septet (1H), and a singlet (3H).

For your #C_1CH_2CH_2CH_2C_1# fragment I don't know. Are the #C_1's# the same?

For #(H_3C)_2CHC(=O)CH_3#, we would first integrate the spectrum, and get a #6:1:3# integrand ratio, a doublet, a septet, and singlet.