Nickel(II) and Palladium(II) Complexes with η(5):κ(1)(N)-Coordinated Dicarbollide Ligands Containing Pendant Pyridine Group

A series of C- and B-substituted nido-carborane derivatives with a pendant pyridyl group was prepared. The synthesized compounds were used as ligands in the complexation reactions with bis(triphenylphosphine)nickel(II) and palladium(II) chlorides to give six new metallacomplexes with unusual η(5):κ(1)(N)-coordination of the metal center. The single crystal structures of 1-(NC(5)H(4)-2′-S)-1,2-C(2)B(10)H(11), 1-(NC(5)H(4)-2′-CH(2)S)-1,2-C(2)B(10)H(11), Cs [7-(NC(5)H(4)-2′-CH(2)S)-7,8-C(2)B(9)H(11)] closo- and nido-carboranes and 3-Ph(3)P-3-(4(7)-NC(5)H(4)-2′-S)-closo-3,1,2-NiC(2)B(9)H(10) and 3-Ph(3)P-3-(4(7)-NC(5)H(4)-2′-CH(2)S)-closo-3,1,2-NiC(2)B(9)H(10) metallacarboranes were determined using single crystal X-ray diffraction.