Coordination Compounds

Consider the following test for a group-IV cation.

\(\mathrm{M}^{2+}+\mathrm{H}_2 \mathrm{S} \rightarrow \mathrm{A} \text { (Black precipitate)+ byproduct }\)

\(\mathrm{A}+\text { aqua regia } \rightarrow \mathrm{B}+\mathrm{NOCl}+\mathrm{S}+\mathrm{H}_2 \mathrm{O}\)

\(\mathrm{B}+\mathrm{KNO}_2+\mathrm{CH}_3 \mathrm{COOH} \rightarrow \mathrm{C}+\text { byproduct }\)

The spin-only magnetic moment value of the metal complex \(\mathrm{C}\) is _________ \(\mathrm{BM}\) (Nearest integer)