Co^(2+)(aq)+SCN^(-)(aq)toComplex (X) Ni^(2+)(aq.)+"Dimethylglyoxime"overset(NH_4OH)toComplex (Y). The coordination number of cobalt and nickel in compleses X and Y are four. Select the correct statement for the complexes (X) and (Y).

Co^(2+)(aq)+SCN^(-)(aq)toComplex (X) Ni^(2+)(aq.)+"Dimethylglyoxime"o

1.	Co^(2+)(aq)+SCN^(-)(aq)toComplex (X) Ni^(2+)(aq.)+"Dimethylglyoxime"overset(NH_4OH)toComplex (Y). The coordination number of cobalt and nickel in compleses X and Y are four. Select the correct statement for the complexes (X) and (Y).
Answer» (X) is PARAMAGNETIC with two UNPAIRED electrons (Y) is diamagnetic and shows intermolecular H-bonding (X) is paramagnetic with three unpaired electrons and (Y) is diamagnetic (X) and (Y) both are diamagnetic Solution :`(X)=[Co(SCN)_4]^(2-)`, cobalt in +2 OXIDATION state and `SCN^-` is weak field ligand.So, `Y=[Ni(dmg)_2]`:Nickel is in +2 oxidation state and dmg is chelating ligand.So, `[Ni(dmg)_2]` shows INTRA molecular H-bonding as shown below. Reaction involved: `Co^(2+)(aq)+4SCN^(-)(aq)to[Co(SCN)_4]^(2-)(aq.)` blue COLOUR complex.