32370-66-4Relevant academic research and scientific papers
Direct photolytic route to trans-Cr(CO)4(AsPh3)2 and crystal structures of cis-Mo(CO)4(AsPh3)2 and cis-W(CO)4(AsPh3)2
Bergstrom, Christina L.,Luck, Rudy L.
, p. 77 - 83 (2008/10/08)
The preparation of trans-Cr(CO)4(AsPh3)2 is accomplished in reasonable yield by the direct photolysis of a solution of Cr(CO)6 and an excess of AsPh3 in heptane. The structures of cis-Mo(CO)4(AsPh3)2 and cis-W(CO)4(AsPh3)2 are reported. These are found to be isostructural and consist of distorted octahedral geometries with As-M-As angles of 102.56(2) and 102.62(2)° for M = Mo and W, respectively. The Mo-As distances of 2.6428(9) and 2.6489(9) A? are significantly longer than those in the W analogue at 2.6384(6) and 2.6361(6) A?. On the basis of a comparison to literature data, the AsPh3 ligands in these molecules can be described as extremely compressed.
Crystal Structures of , and (M = Mo or W): A Comparative Study of Structure and Bonding in Complexes (E = P, As or Sb; M = Cr, Mo or W)
Aroney, Manuel J.,Buys, Irmi E.,Davies, Murray S.,Hambley, Trevor W.
, p. 2827 - 2834 (2007/10/02)
Crystal structures have been determined for , and (M = Mo or W) as part of a systematic study of a series of nine complexes (M = Cr, Mo or W; E = P, As or Sb).Trends in bond lengths and angles are rationalised in terms of streric and electronic interactions between the bonded M(CO)5 and EPh3 fragments.Comparison is made between the solid-state geometry of the free and co-ordinated EPh3.Torsion angles defining the disposition of the EPh3 groups in relation to M(CO)5 show little variation within the series.For all nine complexes the EPh3 groups have propeller geometry with small deviations from symmetric C3 structures.The studies were extended to include other related complexes.Trends in the strutural parameters of 29 such compounds are related to the steric behaviour and ?-acceptor capacity of the ligands L.It is shown that M-P bond dimensions are not adequately explained by hybridisation changes of the phosphorus atom in the ligand L.
