was solved by conventional heavy-atom methods from 2 152 independent reflections and refined to R= 0.053 (R′= 0.064). One osmium atom has been incorporated with the eight carbon atoms of the original cyclo-octatetraene ring to form a planar osmaindenyl system. The second osmium atom is bonded to the first [Os–Os = 2.754(2)Å] and is also η4-bonded to the four carbon atoms of the 5-membered ring, thereby
[Os(MMe 3)2(CO)4 ](M = Si或Ge)或[Os(SiMe 3)(CO)4 } 2 ]用环
辛烯(COT)处理主要得到1,2, 3,3a,6a-η-1,4,5,6-四氢
戊烯基配合物[Os(MMe 3)(CO)2(C 8 H 9)],少量形成[Os 2(CO)6(C 8 H 10)]和未确定的COT二聚体[Os(CO)2(C 16 H 16)]和[Os(CO)3(C 16 H 16))]。后者也是在
辛烷中用COT加热[Os 3(CO)12 ]时形成的。在紫外线照射下,从[Os(SiMe 3)(CO)4 } 2 ]和COT中获得[Os(CO)3(C 8 H 8)]的中等产率。二甲基(四羰基)和环
辛酸酯提供了一种复杂的混合物,从该混合物中,η-(1,1,1-三羰基-1-osmainden-1-yl)三羰基os(Os – Os),[Os 2(CO)6(C得到8 H 6)],并通