Co-Ordination Compounds Question 296
Question: The correct order of ligands in the trans-directing series is
Options:
A) $ C{N^{-}}>CH_3^{-}>NO_2^{-}>B{r^{-}} $
B) $ C{N^{-}}>B{r^{-}}>NO_2^{-}>CH_3^{-} $
C) $ B{r^{-}}>NO_2^{-}>C{N^{-}}>CH_3^{-} $
D) $ CH_3^{-}>C{N^{-}}>NO_2^{-}>B{r^{-}} $
Show Answer
Answer:
Correct Answer: A
Solution:
The trans-effect may be defined as the labelization of ligands trans- to the other trans-directing ligand.
[Note: The order of ligands in the trans- directing series is as follows: $ C{N^{-}}\tilde{\ }~CO\tilde{\ }NO\tilde{\ }{H^{-}}>CH_3^{-}\tilde{\ }SC{{(NH_2)}_2}\tilde{\ } $
$ PR_3>SO_3H>NO_2^{-}\tilde{\ }{I^{-}}\tilde{\ }SC{N^{-}}>B{r^{-}}> $
$ C{l^{-}}>Py>RNH_2\tilde{\ }NH_3>O{H^{-}}>H_2O] $
