ChemistryJEE Main 28 Jan 2026, Shift 2·Q25·Numerical·Moderate

Coordination Compounds · Werner complex and t2g electron count

The number of isoelectronic species among

\ce{Sc^3+}

\ce{Cr^2+}

\ce{Mn^3+}

\ce{Co^3+}

and

\ce{Fe^3+}

is ‘n'. If ‘n' moles of AgCl is formed during the reaction of complex with formula

\ce{CoCl3(en)2NH3}

with excess of

\ce{AgNO3}

solution, then the number of electrons present in the

t_{2g}

orbital of the complex is .

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