SYNTHESIS AND SOME TRANSFORMATIONS OF COMPLEX NICKEL(II) SALTS OF BIS(3,1,2-DICARBONYLALLYL)NICKEL(III). PREPARATION OF 3-(2,2'-BIPYRIDYL)-closo-3,1,2-NICKELADICARBADODECABORANE

Article abstract of DOI:10.1016/0022-328X(85)87346-0

III>2Ni^II*4L compounds (2a,b), where Cb is ?-(3)-1,2-C2B9H11 and L is 2,2'-bipyridyl (2a) or pyridine (2b), have been prepared by the reaction of NiCl2 with III>Na (1) in the presence of the corresponding ligands L.The salt with bipyridyl (1a) forms the complex Na*2L (3).Complexes 2a and 3 decompose at 200-230 deg C to form 3-(2,2'-bbipyridyl)-closo-3,1,2-nickeladicarbadodecaborane (4).Compound 4 has also been prepared by thermal decompositin of bipyridyl complexes of bis-(1-o-carboranyl)nickel or the nickel salt of 1-o-carboranecarboxylic acid.In this case, the o-carboranic nucleus is transformed into a closo-nickelcarboranic one.