Determine the configuration of each of the following as Z or E as appropriate:(a) (b) (c)...

Determine the configuration of each of the following as Z or E as appropriate:

(a)

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(b)

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(c)

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(d)

Sample Solution (a) One of the doubly bonded carbons bears a methyl group and a hydrogen. According to the Cahn–Ingold–Prelog sequence rules, methyl outranks hydrogen. The other carbon atom of the double bond bears a methyl and a —CH₂OH group. The —CH₂OH group is of higher priority than methyl.

Higher ranked groups are on the same side of the double bond; the configuration is Z.