acetylides. Protonation of these derivatives yields the vinylidene complexes [RuCC(H)C(C⋮CR)Ph2}(η5-C9H7)(PPh3)2][BF4] (12a−14a). The crystal structure of [RuC⋮CC(C⋮CH)Ph2}(η5-C9H7)(PPh3)2] (11a) was determined by X-ray diffraction methods. In the structure the alkynyl chain is nearly linear (Ru−C(1)−C(2) = 175.0(2)°) with Ru−C(1) and C(1)−C(2) distances of 1.993(2) and 1.209(3) Å, respectively. The monosubstituted
所述diphenylallenylidene络合物的[Ru(C ^ C ^器CPh 2)(η 5 -C 9 ħ 7)L- 2 ] [PF 6 ](L = PPH 3,L 2 = 1,2-二(
二苯基膦基)
乙烷(dppe),双(
二苯基膦基)
甲烷(
DPPM))(1一- C ^)用NaOMe反应以得到methoxyalkynyl衍
生物的[Ru C⋮CC(OME)PH 2 }(η 5 -C 9 ħ 7)L- 2 ](3一- C)。这些物质的质子化返回起始的亚烯基衍
生物。在C区域选择性增加γ时也观察到1成一个,b与LIR(R = Me中,处理过的Ñ卜),得到炔基络合物的[Ru C⋮CC(R)PH 2 }(η 5 -C 9 ħ 7)L- 2 ](图4a,b,5一个,b)。亚
乙烯基衍
生物的[Ru Ç C(H)C(R)PH 2 }(η 5 -C 9 ħ 7)(PPH 3)2[BF 4 ](6a,7a)可以通过用HBF