29743-03-1Relevant articles and documents
Equilibrium studies of phosphine and amine substitution reactions of tungsten carbonyl
Angelici, Robert J.,Ingemanson, Carol M.
, p. 83 - 86 (1969)
Equilibrium constants, K, have been determined for the reaction (Am)W(CO)5 + L ? (L)W(CO)5 + Am. For a given L group, K values increase for different amines, Am, in the order: p-CH3OC6H4NH2 3C6H4NH2 6H5NH2 6H4NH2. This trend is interpreted to mean that the strength of the W-Am bond decreases with decreasing basicity of the amine. For a given Am group, K decreases with different L groups as follows: P(n-C4H9)3 ～ P(C6H11)3 ≥ P(OCH2)3CC2H5 > P(SCH2)3CCH3 ≥ P(O-n-C4H9)3 > P(C6H5)3 > As(C6H5)3 > Sb(C6H5)3 ～ P(OC6H5)3 ～ p-CH3OC6H4NC > Bi(C6H5)3. Since this is essentially the order of decreasing basicity of the phosphorus donor ligands, the results suggest that σ bonding, not π bonding, is largely responsible for the strength of the W-L bond. Enthalpies and entropies have been determined for some of these reactions, and they support the above conclusions.
Conformational studies of EPh3M(CO)5 complexes (E = P, As or Sb; M = Cr, Mo or W)
Davies, M. S.,Allen, G. W.,Aroney, M. J.,Hambley, T. W.,Pierens, R. K.
, p. 81 - 92 (2007/10/02)
Studies are reported of the electro-optical Kerr effect, electric dipole moments and IR carbonyl stretching frequencies of the nine EPh3(CO)5 complexes (E = P, As or Sb and M = Cr, Mo or W).The experimental results are applied in conjuction with molecular
