六羰基铬(Cr(CO)5 L,LP(C 6 H 5)3,P(C 4 H 9)3,P(OCH 3)3,P(OC 6 H 5)单取代衍生物的配体解离)3和As(C 6 H 5)3)
摘要:
由LP(C 6 H 5)3,P(OC 6 H 5)3,P(OCH 3)3和As(C )确定了独特配体与Cr(CO)5 L的解离速率通过与CO反应,得到6 H 5)3。在80140℃下研究了反应,并确定了活化参数。速率数据与确定配体L的解离速率完全一致。配体不稳定性的顺序为As(C 6 H 5)3 > P(C 6 H 5)3> P(OC 6 H 5)3 > P(OCH 3)3。对于LP(C 4 H 9)3,观察到平衡,并在140和170℃下评估平衡常数。该平衡极大地有利于作为产物的Cr(CO)5 P(C 4 H 9)3。这些研究使得可以定量比较这些复合物的配体结合。已经注意到室内光激活了CrP键。
Abstract Studies are reported of the electro-optical Kerr effect, electric dipole moments and IR carbonyl stretching frequencies of the nine EPh 3 (CO) 5 complexes (E P, As or Sb and M Cr, Mo or W). The experimental results are applied in conjunction with molecular mechanics calculations and data from X-ray crystal structure analysis, to explore the stereostructural preferences of the EPh 3 M(CO) 5 molecules