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Ruthenium piano-stool complexes bearing imidazole-based PN ligands


Kunz, Peter C; Thiel, Indre; Noffke, Anna Louisa; Reiss, Guido J; Mohr, Fabian; Spingler, Bernhard (2012). Ruthenium piano-stool complexes bearing imidazole-based PN ligands. Journal of Organometallic Chemistry, 697(1):33-40.

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)(2)Cl]. 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 kappa P-1-monodentate, kappa P-2,N-, kappa N-2,N- and kappa N-3,N,N-chelating and mu-kappa P:kappa N-2,N-brigding. The solid-state structures of CpRu(1a)(2)Cl]center dot H2O (5 center dot H2O) and {CpRu(mu-kappa(2)-N,N-kappa('1)-P-2b)}(2)](C6H5PO3H)(2)(C6H5PO3H2)( 2), a hydrolysis product of the as well determined {CpRu(2b)} (2)](PF6)(2)center dot 2CH(3)CN (7b center dot 2CH(3)CN) 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. (C) 2011 Elsevier B. V. All rights reserved.

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)(2)Cl]. 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 kappa P-1-monodentate, kappa P-2,N-, kappa N-2,N- and kappa N-3,N,N-chelating and mu-kappa P:kappa N-2,N-brigding. The solid-state structures of CpRu(1a)(2)Cl]center dot H2O (5 center dot H2O) and {CpRu(mu-kappa(2)-N,N-kappa('1)-P-2b)}(2)](C6H5PO3H)(2)(C6H5PO3H2)( 2), a hydrolysis product of the as well determined {CpRu(2b)} (2)](PF6)(2)center dot 2CH(3)CN (7b center dot 2CH(3)CN) 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. (C) 2011 Elsevier B. V. All rights reserved.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:January 2012
Deposited On:19 Oct 2012 10:58
Last Modified:07 Dec 2017 15:24
Publisher:Elsevier
ISSN:0022-328X
Publisher DOI:https://doi.org/10.1016/j.jorganchem.2011.10.006
Other Identification Number:ISI:000297258400005

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