Determine whether each of the following compounds is a cis isomer or a trans isomer.
(a) (b)
(c) (d)
(e) (f)

Question

Determine whether each of the following compounds is a cis isomer or a trans isomer. (a) (b) (c) (d) (e) (f)

TestHub · Accepted Answer

On any ring carbon the axial bond points straight up or down; a substituent on the same face as that axial bond is 'up', otherwise 'down'. Two substituents on the same face = cis; on opposite faces = trans.

(a) $C H_{3}$ and $Br$ both down : cis.

(b) $Cl$ and $C H_{3}$ both up : cis.

(c) $Br$ and $Cl$ both up : cis.

(d) $C H_{3}$ up, $Cl$ down : trans.

(e) $Br$ down, $C H_{3}$ up : trans.

(f) both $C H_{3}$ groups down : cis.

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