Saved Bookmarks
| 1. |
Which of the following statements is/are correct ?A. `[Cr(NH_3)_6]^(3+) gt [Mn(CN)_6]^(3-) gt [V(CO)_6]^(3-) gt [Mn(CN)_6]`, with respect to magnetic moment (spin values in B.M.)B. `[Co(CN)_6]^(3-)gt[Co(NH_3)_6]^(3+) gt [Co(H_2O)_6]^(3+)` , With respect to `Delta_0` valuesC. `[Ni(CO)_4] gt [Co(CO)_4]^(-) gt [Fe(CO)_4]^(2-)`, With respect to strength of M-C, `pi`-bond (M=Ni, Co or Fe)D. `[NiCl_4]^(2-) lt [CuCl_4]^(2-) lt [ZnCl_4]^(2-)` ,With respect to stability. |
|
Answer» Correct Answer - A,B,D (A)`Cr^(3+)-3d^3` configuration `(t_(2g)^(1,1,1).e_(g)^(0,0)),Mn^(3+)-3d^(4)` configuration `(t_(2g)^(1,1,1).e_(g)^(0,0)),V-3s^5` configuration `(t_(2g)^(1,1,1).e_(g)^(0,0))` (B)`Delta_0prop` strength of ligand for same oxidation state of central metal. (C )In carbonylate anion, the metal has a greater electron density to be dispersed , with the result that M-C,`pi` bonding is enhanced in strength. hence the correct order is `[Ni(CO)_4]lt[Co(CO)_4]^(-)lt [Fe(CO)_4]^(2-)` for strength of M-C , `pi` bond (D)Chelate effect. |
|