Further reactions of some bis(vinylidene)diruthenium complexes |
| |
Authors: | Michael I Bruce Benjamin G Ellis Allan H White |
| |
Institution: | a Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia b Department of Chemistry, University of Western Australia, Crawley, WA 6009, Australia |
| |
Abstract: | Whereas {Ru(dppm)Cp*}2(μ-CCCC) (2) is the only product formed by deprotonation of {Ru(dppm)Cp*}2{μ(CCHCHC)}]+ with dbu, a mixture of 2 with Ru{CCCHCH(PPh2)2RuCp*]}(dppm)Cp* (3) and {Cp*Ru(PPh2CHCCH-)}2 (4) is obtained with KOBut. A similar reaction with {Ru(dppm)Cp*}2{μ(CCMeCMeC)}]+ (5) gave Ru{CCCMeCH(PPh2)2RuCp*]}(dppm)Cp* (6). X-ray structures of 4, 5 and 6 confirm the presence of the 1-ruthena-2,4-diphosphabicyclo1.1.1]pentane moiety, which is likely formed by an intramolecular attack of the deprotonated dppm ligand on C(1) of the vinylidene ligand. Protonation of {Ru(dppe)Cp*}2(μ-CCCC) (8-Ru) regenerates its precursor {Ru(dppe)Cp*}2{μ(CCHCHC)}]2+ (7-Ru). Ready oxidation of the bis(vinylidene) complex affords the cationic carbonyl Ru(CO)(dppe)Cp*]PF6 (9) (X-ray structure). |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|