17000-31-6Relevant articles and documents
Five-coordination. VII. Diamagnetic nickel(II) complexes with polydentate phosphines containing sulfur and selenium donor atoms
Workman, Marcus O.,Dyer,Meek, Devon W.
, p. 1543 - 1548 (2008/10/08)
The tridentate ligand bis(o-methylthiophenyl)phenylphosphine (DSP, I) forms three types of five-coordinate nickel(II) complexes illustrated by the formulas [Ni(DSP)X2], [Ni(DSP)2](ClO4)2, and [Ni(DSP)(bidentate)] (ClO4)2. The bidentate ligand diphenyl(o-methylthiophenyl)phosphine (SP, II) gives four-, five-, and six-coordinate nickel(II) complexes, exemplified by the formulas [Ni(SP)Cl2], [Ni(SP)2Br]ClO4, and [Ni(SP)2Cl2], respectively. The analogous selenium-phosphine ligand diphenyl(o-methylselenophenyl)phosphine (SeP, III) functions similarly. The properties of the SP and SeP complexes, especially the electronic absorption spectra, are compared with those of the phosphorus-arsenic ligand, diphenyl(o-diphenylarsinophenyl)phosphine. The spectrochemical series for the different donor groups is established as R2Se 2S 3As 3P, whereas the absorption band intensities, which may be related to the covalent character of the nickel-ligand bond, produce a different order: S Se As.