X-Ray crystal structure of the pentagonal bipyramidal nickel(II) complex [NiII(L)(H2O)2](BF4)2 and the selective stabilisation of the nickel(I) oxidation state by a quinquedentate macrocyclic ligand
Abstract
The single crystal X-ray structure of the pentagonal bipyramidal nickel(II) complex [NiII(L)(H2O)2](BF4)2 involving the quinquedentate macrocyclic ligand L is reported; electrochemical reduction of a series of related nickel(II) complexes [NiII(L)X2](BF4)2 yields in solution d9 nickel(I) species.