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Spin-Spin Splitting

1.What splitting pattern in the 1H nmr spectrum would you expect for the hydrogen atom(s) colored red in the compounds shown below?
Your choices are:s singlet d doublet t triplet q quartet m multiplet. Enter the appropriate letter in the answer box to the right of each formula.
Do not enter punctuation (eg. commas or semicolons) or spaces.

A
Cumene (isopropylbenzene), benzene ring bearing a CH(CH3)2 group with the methine H highlighted 		B
Structure of CH3-O-CH2-N(CH3)2, methoxymethyl dimethylamine, with the OCH2N hydrogens highlighted 		C Para-bromonitrobenzene with the two ring H ortho to nitro highlighted red
D
tert-Butyl ethyl ether, (CH3)3C-O-CH2CH3, with the OCH2 hydrogens highlighted 		E
Structure of (CH3O)2CH-CH2CH3, propanal dimethyl acetal, with the acetal CH highlighted 		F Oxetane, four-membered ring of O and three CH2 groups, with the central CH2 hydrogens highlighted

2. Which of the following compounds would be expected to show spin-spin splitting in their 1H NMR spectra? (Check the appropriate button).

Compound Splitting No Splitting
Compound
Splitting
No Splitting

(CH3)3C-O-CH3
(CH3)2CH-O-CH3

Br-CH2CH2CH2-Br
 Br-CH2CH2-Br
Para-xylene, benzene ring with two methyl groups in 1,4 positions Para-dibromobenzene, benzene ring with bromine atoms in 1,4 positions
1,4-Cyclohexanedione, cyclohexane ring with two carbonyl groups at 1 and 4 1,3-Cyclohexanedione, cyclohexane ring with two carbonyl groups at 1 and 3

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