Complexing properties of α-nitroketones. Complexes of nickel(II) and cobalt(II)
Donato AttanasioInes CollamatiClaudio Ercolani
Abstract
Complexes of the α-nitroketones (LH) nitroacetone, 1-nitrobutan-2-one, 3,3-dimethyl-1-nitrobutan-2-one, α-nitrodeoxybenzoin, 2-nitrocyclohexanone, and 3-nitrocamphor with NiII and CoII of the general formulae ML2Bn, where B is water (n= 2 or 3), ethanol or pyridine (n= 2), and ML2 have been prepared and are described in the present paper. It is shown that the α-nitroketonic group is always available for co-ordination to a metal ion and normally behaves as a bidentate O-donor with both the carbonyl and the nitro-group directly participating in the chelation. X-Ray powder patterns, magnetic susceptibility measurements, and diffuse-reflectance and solution spectra in the near-i.r.–visible region have been studied and a six-co-ordinate structure has been established for all the complexes examined.
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