The reaction of H2 with [RP-W(CO)5] (R = Ph, Me) above 120 °C leads, first, to the secondary diphosphine complex (RPH-PHR)(W(CO)5)2 and then to the primary phosphine complex (RPH2)(W(CO)5). On the basis of DFT calculations, the mechanism most likely involves the addition of H2 to the P–W bond, followed by the formation of the radical [RPH-W(CO)5]• by homolysis of the W–H bond. In the case of [PhNHP-W(CO)5]
H 2与[RP-W(CO)5 ](R = Ph,Me)在120°C以上的反应首先导致仲
二膦配合物(RPH-PHR)(W(CO)5)2,然后到初级膦配合物(RPH 2)(W(CO)5)。根据DFT计算,该机理最可能涉及在P–W键中添加H 2,然后通过W–H键均化形成自由基[RPH-W(CO)5 ] •。在[PhNHP-W(CO)5 ]的情况下,氢解发生在
PN键上,并最终产生仲二
氨基膦配合物((PhNH)2 PH)(W(CO)5)。