Influence of the nature of organic ligands on the character of thermal decomposition products of CoII and NiII pivalate complexes with amino derivatives of pyridine
Formation of amidine ligands in coordination spheres of Co<sup>II</sup>and Ni<sup>II</sup>atoms
作者:T. B. Mikhailova、E. V. Pakhmutova、A. E. Malkov、I. F. Golovaneva、A. A. Sidorov、I. G. Fomina、G. G. Aleksandrov、V. N. Ikorskii、V. M. Novotortsev、I. L. Eremenko、I. I. Moiseev
DOI:10.1023/b:rucb.0000011865.18994.5c
日期:2003.10
Reactions of polynuclear cobalt and nickel pivalates with amines in MeCN afforded compounds containing the amidine ligands (MeC(NHR)=NH). The reactions with 2,6-diaminopyridine yielded the Ni(Me3CCOO)(2)H2N(C5H3N)NHC(Me)=NH}, Co-2(Me3CCOO)(4)H2N(C5H3N)NHC(Me)=NH},Co(Me3CCOO)(2)H2N(C5H3N)NHC(Me)=NH} complexes and the solvate of the latter with Me3CCOH and C6H6. The reaction with S-(-)-alpha-methylbenzylamine gave rise to the ionic chiral compound with composition [PhCH(Me)NHC(Me)NH2](+)[Co-2(Me3CCOO)(5)](-) as a diastereomeric salt. According to the results of X-ray diffraction analysis, the asymmetric carbon atom in the cation and the asymmetric cobalt atom in the binuclear anion of this salt have the S absolute configuration.* The Compounds were characterized by elemental analysis data and the results of IR and electronic spectroscopy. Their structures were established by X-ray diffraction analysis. The chiroptical properties of the ionic compound in solution were studied by circular dichroism spectroscopy.