Nickel(II) complexes with boron cluster anions [BnHn]2– (n = 10, 12) and azaheterocyclic ligands L (L = Bipy, Phen, BPA, and DAB)

Abstract

The effect of the nature of azaheterocyclic ligands L (L is 1,2-diaminobenzene, 2,2’-bipyridyl-amine, 2,2’-bipyridyl, or 1,10-phenanthroline) on the composition and structure of nickel(II) coordination compounds with the [B_nH_n]^2– anions (n = 10, 12) has been studied. Conditions to isolate complexes of general formulas [NiL₂(H₂O)₂][B_nH_n] and [NiL₃][B_nH_n] have been found. The structures of [Ni(DAB)₂(H₂O)₂][B₁₀H₁₀] · H₂O, [Ni(BPA)₂(H₂O)₂][B₁₀H₁₀] · 3H₂O, [Ni(Bipy)₃][B₁₀H₁₀], [Ni(Bipy)₃][B₁₀H₁₀] · 3CH₃CN · 0.5H₂O, [Ni(Phen)₃][B₁₀H₁₀] · 4DMF · 0.32H2O[Ni(Phen)3][B12H12] · 1.5DMF · 0.25H₂O, and [Ni(Phen)₃](Et₃NH)[B₁₀H₁₀]_1.5 · 1.75CH₃CN have been determined by X-ray diffraction. Structural features of the complexes including intermolecular contacts of different elements of the structures are discussed.