Question

Match the following columns.

Column I(Metal ion configuration in strong ligand field)		Column II$(CFSE{\Delta }_o$ value $)$
A	$d^4$	1	$-2.4$
B	$d^5$	2	$-2.0$
C	$d^6$	3	$-1.8$
D	$d^7$	4	$-1.6$

• A. $A-(4),B-(2),C-(1),D-(3)$
• B. $A-(1),B-(2),C-(3),D-(4)$
• C. $A-(3),B-(4),C-(2),D-(1)$
• D. $A-(2),B-(3),C-(4),D-(1)$

Answer 1

Answer: (A)

$A\to 4,B\to 2,C\to 1,D\to 3$

$\text{ For }{d}^5,\text{ CFSE }=-5\times 0.4=-2.0$
$\text{ For }{d}^6,\text{ CFSE }=-6\times 0.4=-2.4$
$\text{ For }{d}^7,\text{ CFSE }=-6\times 0.4+1\times 0.6$
$=-2.4+0.6=-1.8$