Central metal ion in complex compound acts as

Explain the types of valencies shown by a central metal atom of a complex compound.

The primary valency of the central transition metal ion in a complex compound (Cr(NH_(3))_(4)Cl_(2)]Cl

How do you determine the hybridisation of the central metal ion of a complex from its magnetic moment?

The co - ordination number of the central metal ion in a complex is determined by

Complex ion [FeN_(3)(O_(2))(SCN)_(4)]^(4-) is named as : (coordination number of central metal ion in complex is six )

Complex ion [FeN_(3)(O_(2))(SCN)_(4)]^(4-) is named as : (coordination number of central metal ion in complex is six )

Which molecule/ion among the following cannot act as a ligand in complex compounds ?