Consider the following test for a group-IV cation.
$M^{2 +} + H_{2} S \to A$ (Black precipitate) + by product
$A +$ aqua regia $\to B + NOCl + S + H_{2} O$
$B + KNO_{2} + CH_{3} COOH \to C +$ by product
The spin-only magnetic moment value of the metal complex $C$ is______BM (Nearest integer)

Question

Consider the following test for a group-IV cation.

M^{2 +} + H_{2} S \to A

(Black precipitate) + by product

A +

aqua regia

\to B + NOCl + S + H_{2} O

B + KNO_{2} + CH_{3} COOH \to C +

by product
The spin-only magnetic moment value of the metal complex

C

is______BM (Nearest integer)

Accepted Answer

Correct answer: 0. (0) If M^+2=Co^+2 then Co^+2+ H_2 S Black\ [A] CoS+ byproduct CoS+ aqua regia [B] CoCl_2+ NOCl+ S+ H_2 O CoCl_2+ KNO_2 CH_3 COOHk_3 [ CO( NO_2)_6 ]+ byproduct [C ]= Co^+3 3d^6 ⇒NO_2 is SFL so Co+3 has zero unpaired e^- ⇒n=0 ⇒u= n (n+2 )=0B .M

$Consider the following test for a group-IV cation. M^{2 +} + H_{2} S \to A (Black precipitate) + by product A + aqua regia \to B + NOCl + S + H_{2} O B + KNO_{2} + CH_{3} COOH \to C + by product The spin-only magnetic moment value of the metal complex C is______BM (Nearest integer)$

Solution

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