We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Reactions of Ethyne with Some Ruthenium Cluster Complexes Containing dppm.
- Authors
Bruce, Michael I.; Pyke, Simon M.; Zaitseva, Natasha N.; Skelton, Brian W.; White, Allan H.
- Abstract
Reactions of ethyne with [Ru3( μ-dppm)(CO)10] have given isomeric complexes [Ru3( μ3-C6H6)(CO)6(dppm)], one of which, 2, contains the dppm chelating an Ru-atom, together with a hexatrienetriyl ligand attached to the Ru3 cluster to form a methylideneruthenacyclohexadiene system. The second isomer 3 contains the dppm bridging an Ru−Ru bond, with the C6H6 ligand forming a vinylruthenacyclopentadiene system. Also isolated was the open-chain Ru3 complex 4 containing a ruthenacyclopentadiene attached to the central Ru-atom; the other Ru−Ru vector is bridged by a PPh2CHPPh2C4H5 ligand, formed by a novel insertion of two ethyne molecules into an Ru−P bond. The reaction of ethyne with [Ru3( μ-H)( μ3-C2H2)(CO)9] proceeded by attack at the coordinated alkyne and at the cluster to give a cluster-bonded PPh2CH2PPh2CCH system in 7. Thermolysis of [Ru3( μ-H)( μ3-C2SiMe3)( μ-dppm)(CO)7] ( 8; refluxing MeOH) in the presence of KF gave [Ru6( μ-CCH2)2( μ-dppm)2(CO)12] ( 9; 80%); similar reactions carried out with [RuClCp(PPh3)2] also present gave 9 (67%) together with [Ru3( μ-H)( μ3-C2H)( μ-dppm)(CO)6(PPh3)] ( 11; 23%). The molecular structures of 2, 3, 4, 7, 9, and 11, some as differently solvated forms, have been determined by single-crystal X-ray studies.
- Publication
Helvetica Chimica Acta, 2001, Vol 84, Issue 10, p3197
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/1522-2675(20011017)84:10<3197::AID-HLCA3197>3.0.CO;2-S