Complex 'X' of composition of \(\mathrm{Cr}{({\mathrm{H}}_{2}\mathrm{O})}_{6}{\mathrm{Cl}}_{\mathrm{n}}\) has a spin onl…

Complex 'X' of composition of \(\mathrm{Cr}{({\mathrm{H}}_{2}\mathrm{O})}_{6}{\mathrm{Cl}}_{\mathrm{n}}\) has a spin only magnetic moment of \( 3.83 \mathrm{~BM} \). It reacts with \( \mathrm{AgNO}_{3} \) and shows geometrical isomerism. The IUPAC nomenclature of X is :

[JEE Main 2020, 9 Jan (Shift 1)]