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Stoeckli-Evans, Helen
Nom
Stoeckli-Evans, Helen
Affiliation principale
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Professeur.e émérite
Email
helen.stoeckli-evans@unine.ch
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Voici les éléments 1 - 2 sur 2
- PublicationMétadonnées seulementReactions of the cluster anion [HRu3(CO)(11))](-) with dicyclohexylphosphine: Synthesis and molecular structure of H2Ru3(CO)(8)(PCy2)(2) and H2Ru3(CO)(6)(PCy2)(2)(HPCy2)(2)(2001)
; ;Godefroy, Isabelle ;Faure, Matthieu ;Neels, AntoniaThe cluster anion [HRu3(CO)(11)](-) (1) reacts with dicyclohexylphosphine in THF solution to give the anionic derivative [HRu3(CO)(8)(PCy2)(2)](-) (2), protonation of which yields the neutral cluster H2Ru3(CO)(8)(PCy2)(2) (3) and, in the presence of excess phosphine, HRu3(CO)(7)(PCy2)(3) (4). In protic methanol as reaction medium, the reaction of 1 with HPCy2 gives directly the neutral complex H2Ru3(CO)(6)(PCy2)(2)(HPCy2)(2) (5). together with 4. The single-crystal structure X-ray analysis of 3 shows a closed triangular Ru, framework. Tho electron count is in accordance with the EAN rule, but the structure analysis of 5 reveals an open, almost linear Ru, skeleton, which is electron-deficient with respect to the EAN rule. - PublicationMétadonnées seulementElectron-deficient triruthenium clusters: synthesis and molecular structure of the anion [HRu3(CO)(7)(PCy3)(2)](-), a second example of an Ru-3 cluster presenting an electron count of 44 electrons(1999)
;Godefroy, Isabelle; The reaction of [HRu3(CO)(11)](-) (1) with an excess of PCy3 in refluxing THF gives the electron-deficient anion [HRu3(CO)(7)(PCy3)(2)](-) (2) which has the rare electron count of 44e. As evidenced by the H-1 and P-31 NMR spectra, 2 exists in solution in the form of two isomers 2a and 2b, one of which crystallises from acetone as the tetraethylammonium salt. The single-crystal X-ray analysis shows a closed Ru, framework with the hydride ligand bridging the metal-metal bond between a phosphine-substituted and a phosphine-free ruthenium atom (isomer 2b). (C) 1999 Elsevier Science S.A. All rights reserved.