A comparison of the ligating properties of the mixed P/O- and P/S-donor ligands Ph2P(CH2)2O(CH2)2O(CH2)2PPh2 and Ph2P(CH2)2S(CH2)2S(CH2)2PPh2 with Group 6 and 7 carbonyls
作者:Bjorn Heuer、Melissa L Matthews、Gillian Reid、Mark Ripley
DOI:10.1016/s0022-328x(02)01413-4
日期:2002.8
[M(CO)4(nbd)] (M=Cr or Mo) react with L1 (Ph2P(CH2)2O(CH2)2O(CH2)2PPh2) to give the trans-[Cr(CO)4(L1)] and cis-[Mo(CO)4(L1)] respectively, both of which show coordination of L1 through the P atoms only, giving 11-membered ring metallocyclic complexes. The crystal structure of [Mo(CO)4(L1)] confirms the cis-geometry of the product. The cis-[W(CO)4(L1)] is obtained similarly from [W(CO)4(TMPA)]. Prolonged
Synthesis, Characterization, and Novel Fluxional Mechanisms of Triosmium Clusters Containing the Highly Flexible Ligand Ph<sub>2</sub>PC<sub>2</sub>H<sub>4</sub>SC<sub>2</sub>H<sub>4</sub>SC<sub>2</sub>H<sub>4</sub>PPh<sub>2</sub> (PSSP)
作者:Roger Persson、Marc J. Stchedroff、Bettina Uebersezig、Roberto Gobetto、Jonathan W. Steed、Paul D. Prince、Magda Monari、Ebbe Nordlander
DOI:10.1021/om900966c
日期:2010.5.24
respect to the phosphines operates in the cluster. This type of process has not been observed previously for a bridging ligand, but has been detected in the case of corresponding triosmiumclusters with bis-monodentate phosphineligands. Oxidative decarbonylation of [Os3(CO)11}2(μ-PSSP)], 1, with Me3NO yields cluster [Os3(CO)10}2(μ-PSSP)], 4. This cluster consists of two P,S-bridged cluster units. In
在温和的条件下用[Os 3(CO)11(NCMe)]处理Ph 2 PC 2 H 4 SC 2 H 4 SC 2 H 4 PPh 2(PSSP),产生[Os 3(CO)11 } 2(μ- PSSP)],1和[Os 3(CO)11(PSSP)],2。在簇1中,配体连接两个三核簇亚基,通过其膦部分进行配位。在集群2中,配体通过膦基之一配位,而PSSP配体的其余部分以悬空模式取向。用PSSP处理[Os 3(CO)10(NCMe)2 ]产生1,2- [Os 3(CO)10(PSSP)],3。本文提供的NMR数据表明,相对于膦而言,顺式/反式的同构异构体在簇中起作用。对于桥接配体,以前尚未观察到这种方法,但是在具有双单齿膦配体的相应tri簇的情况下已检测到这种方法。[Os 3(CO)11 }的氧化脱羰2(μ-PSSP)],1,其中Me 3 NO产生簇[Os 3(CO)10 } 2(μ-PSSP)