determined for the isomerization of the linkage isomers (OC)5W[κ1-PPh2CH2P(p-tolyl)2] (5) and (OC)5W[κ1-P(p-tolyl)2CH2PPh2] (6). It is proposed that this intramolecular exchange involves a nucleophilic attack of the pendant phosphine on a cis carbonyl group, followed by ring opening and a 1,2-shift.
平衡常数和速度已被确定为键异构体的异构化(OC)5 W [κ 1 -PPh 2 CH 2 P(p -
甲苯基)2 ](5)和(OC)5 W [κ 1 -P(
对甲苯基)2 CH 2 PPh 2 ](6)。提出这种分子内交换涉及侧基膦对顺式羰基的亲核攻击,然后开环和1,2-移位。