1075751-22-2Relevant academic research and scientific papers
Influence of ligand electronic effects on the structure of monovalent cobalt complexes
DuPont, Julie A.,Yap, Glenn P. A.,Riordan, Charles G.
, p. 10700 - 10707 (2008)
The syntheses, spectroscopic properties, and structures of the monovalent cobalt complexes, [PhTttBu]Co(L), 1-L {PhTttBu = phenyltris[(tert-butylthio)methyl]borate; L = PPh3, PMe3, PEt3, PMe2Ph, PMePh2, P(OPh)3, CNBut}, are described. Complexes 1-L are prepared via the sodium amalgam reduction of [PhTttBu]CoCl in the presence of L. The complexes display magnetic moments and paramagnetically shifted 1H NMR spectra consistent with triplet, S = 1, ground states. The molecular geometries, determined by X-ray diffraction methods, reveal that some of the complexes display structures in which the L donor is moved off of the inherent 3-fold axis. In the most extreme cases (e.g., 1-P(OPh)3 or 1-CNBut), the geometries can be described as cis-divacant octahedra. The origin of the geometric distortions is a consequence of the electronic characteristics of L as first deduced by Detrich et al. for [Tp Np]Co(L) (J. Am. Chem. Soc. 1996, 118, 1703). The results establish a linear correlation between the magnitude of the structural distortion and the electronic parameter of the phosphine donor.
