The reaction of LiP(H)Tipp (2a) and KP(H)Tipp (2b, Tipp = C6H2‐2,4,6‐iPr3), which are accessible via metalation of Tipp‐PH2 (1), with bis(4‐tert‐butylphenyl)phosphinic chloride yields Tipp‐P=P(OM)Ar2 [M = Li (3a) and K (3b)]. These complexes show characteristic chemical 31P shifts and large 1JPP coupling constants. These compounds degrade with elimination of the phosphinidene Tipp‐P: and the alkali
LiP(H)Tipp(2a)和KP(H)Tipp(2b,Tipp = C 6 H 2 -2,4,6- i Pr 3)的反应,可通过Tipp-PH 2(1),使用双(4-
叔丁基苯基)次膦酰
氯可产生Tipp-P = P(OM)Ar 2 [M = Li(3a)和K(3b)]。这些配合物显示出特征性的31 P位移和1 J PP较大的偶联常数。这些化合物通过消除次膦基Tipp-P和碱
金属二芳基
次膦酸酯M–O–PAr 2而降解[M = Li(4a)和K(4b)]。次膦通过二次插入新形成的Tipp-的P-H键形成二次降解产物(如
二膦Tipp-P(H)-P(H)Tipp(5)的内消旋和R,R / S,S-异构体。PH 2),而[Tipp-P = P(OLi)Ar 2 · Li
OPAr 2 · LiCl · 2Et 2 O] 2(即[ 3a·4a· LiCl · 2Et 2 O] 2)的结晶是从
乙醚中进行的。LiP(Si