The correct increasing order of trans-effect of the following species is:
$N H_{3} > C N^{-} > B r^{-} > {C_{6} H_{5}}^{-}$
$C N^{-} > {C_{6} H_{5}}^{-} > B r^{-} > N H_{3}$
$B r^{-} > C N^{-} > N H_{3} > {C_{6} H_{5}}^{-}$
$C N^{-} > B r^{-} > C_{6} H_{5}^{-} > N H_{3}$

Question

The correct increasing order of trans-effect of the following species is-NH-3 - CN- - Br- - -C-6 H-5-CN- - -C-6 H-5- - Br- - NH-3Br- - CN- - NH-3 - -C-6 H-5-CN- - Br- - C-6H-5- - NH-3

Toppr Admin · Accepted Answer

Trans effect can be defined as the effect of a ligand towards substitution on other ligand which is trans to it.
(weak) $F^{-} < H O^{-} < H_{2} O < N H_{3} < p y < C l^{-} < B r^{-} < I^{-} < S C N^{-} < N O_{2}^{-} < S C (N H_{3})_{2} < P h^{-}$ $< S O_{3}^{2 -} < P R_{3} < A s R_{3} < S R_{2} < H_{3} C^{-} < H^{-} < N O < C O < N C^{-} < C_{2} H_{4}$ (strong).
Trans effect is nothing but those ligands which are trans directing. That means, which prefer a trans structure. Mostly in Square planar complexes.
Hence option D is correct.

The correct increasing order of trans-effect of the following species is:NH3>CN−>Br−>C6H5−CN−>C6H5−>Br−>NH3Br−>CN−>NH3>C6H5−CN−>Br−>C6H−5>NH3

The correct increasing order of trans-effect of the following species is:
$N H_{3} > C N^{-} > B r^{-} > {C_{6} H_{5}}^{-}$
$C N^{-} > {C_{6} H_{5}}^{-} > B r^{-} > N H_{3}$
$B r^{-} > C N^{-} > N H_{3} > {C_{6} H_{5}}^{-}$
$C N^{-} > B r^{-} > C_{6} H_{5}^{-} > N H_{3}$