Coordination compound.

Explanation

Coordination compound : This is a compound which consists of a central metal atom or metal ion linked by coordinate covalent bonds to a number of oppositely charged ions (anions), or neutral molecules (ligands) and exhibits the properties different than the properties of constituents of the compound. For example,
`K_(4)[Fe(CN)_(6)], [Co(NH_(3))_(6)]Cl_(3),` etc.
`K_(4)[Fe(CN)_(6)] rarr 4K^(+)+[Fe(CN)_(6)]^(4-)`