coordination geometry to that of Rh(η3-CH2CHCHX)(CO)(PPh3)2. An equimolar reaction of phenylacetylene with Ir(η3-CH2CHCHC6H4Me-p)(CO)(PPh3)2 gives a mixture of trans-Ir(CCPh)(CO)(PPh3)2 and trans,trans-IrH(CCPh)2(CO)(PPh3)2 accompanied by the liberation of 1-(4-methylphenyl)-1-propene. The Ir(III) acetylide complex is obtained separately from the reaction of excess phenylacetylene with the π-allyliridium(I)
Arylallenes如(4-甲基苯基)
丙二烯,phenylallene,和(4-
溴苯基)
丙二烯与IRH(CO)(PPH反应3)3,得到的πallyliridium(I)络合物,
铱(η 3 -CH 2 CHCHAr) (CO)(PPh 3)2(Ar = C 6 H 4 Me- p,Ph和C 6 H 4 Br- p)。该复合物的晶体学研究表现出相似的配位几何形状到的Rh(η的3 -CH 2 CHCHX)(CO)(PPH 3)2。
苯乙炔与
铱等摩尔反应(η 3 -CH 2CHCHC 6 H 4 Me- p)(CO)(PPh 3)2得到反式-Ir(CCPh)(CO)(PPh 3)2和反式-反式-IrH(CCPh)2(CO )(PPh 3)2伴随着1-(4-甲基苯基)-
1-丙烯的释放。Ir(III)
乙炔化物络合物是通过过量的苯基
乙炔与π-烯丙基
铱(I)络合物的反应单独获得的。这些配合物的各自的平