Ruthenium piano-stool complexes bearing imidazole-based PN ligands |
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| Authors: | Peter C Kunz Indre Thiel Anna Louisa Noffke Guido J Reiß Fabian Mohr Bernhard Spingler |
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| Institution: | 1. Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, Universitätsstr. 1, D-40225 Düsseldorf, Germany;2. Bergische Universität Wuppertal, Fachbereich C - Anorganische Chemie, Gaußstr. 20, D-42119 Wuppertal, Germany;3. Anorganisch-Chemisches Institut, Universität Zürich-Irchel, Winterthurerstr. 190, CH-8057 Zürich, Switzerland |
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| Abstract: | A variety of piano-stool complexes of cyclopentadienyl ruthenium(II) with imidazole-based PN ligands have been synthesized starting from the precursor complexes CpRu(C10H8)]PF6, CpRu(NCMe)3]PF6 and CpRu(PPh3)2Cl]. PN ligands used are imidazol-2-yl, -4-yl and -5-yl phosphines.Depending on the ligand and precursor different types of coordination modes were observed; in the case of polyimidazolyl PN ligands these were κ1P-monodentate, κ2P,N-, κ2N,N- and κ3N,N,N- chelating and μ-κP:κ2N,N-brigding. The solid-state structures of CpRu(1a)2Cl ]·H2O (5.H2O) and {CpRu(μ-κ2-N,N-κ’1-P-2b)}2](C6H5PO3H)2(C6H5PO3H2)2, a hydrolysis product of the as well determined {CpRu(2b)}2](PF6)2.2CH3CN (7b.2CH3CN) were determined (1a = imidazol-2-yldiphenyl phosphine, 2b = bis(1-methylimidazol-2-yl)phenyl phosphine, 3a = tris(imidazol-2-yl)phosphine). Furthermore, the complexes CpRu(L)2]PF6 (L = imidazol-2-yl or imidazol-4-yl phosphine) have been screened for their catalytic activity in the hydration of 1-octyne. |
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