71296-50-9Relevant academic research and scientific papers
Isomeric bis[(phenylazo)acetaldoximato]platinum(II) compounds
Bandyopadhyay, Debkumar,Bandyopadhyay, Pinaki,Chakravorty, Animesh,Cotton, F. Albert,Falvello, Larry R.
, p. 1315 - 1321 (2008/10/08)
The reaction of (phenylazo)acetaldoxime, HL, with K2PtCl4 has been shown to yield complexes of composition PtL2 in two isomeric forms, depending on reaction conditions. Under basic conditions deep green A, believed to be the trans isomer, is obtained, while under acidic conditions black B, the cis isomer, which has been X-ray crystallographically characterized, is obtained. Conditions for interconverting the A and B isomers have been defined. Both isomers have been characterized by measurements of molecular mass, mass spectra, electrochemistry, EPR spectra, and chemical reactivity. Isomer B both in the solid state and in solution is EPR active, and it is postulated that this may be due to traces of the cis-PtL2+ ion. In the crystal the asymmetric unit consists of two cis-PtL2 molecules closely associated, though they separate when B is dissolved in chloroform (and, presumably, also in other solvents). The two independent, planar cis-PtL2 units are essentially identical in structure with bond lengths and angles in accord with expected bond orders. The crystals belong to space group P1, and the unit cell dimensions are as follows: a = 10.548 (5) ?, b = 16.341 (8) ?, c = 10.550 (6) ?, α = 98.02 (4)°, β = 106.28 (4)°, γ = 99.12 (4)°, V = 1691 (2) ?3, Z = 4 (PtL2).
