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Crystal and molecular structures of the organometallic species [Rh2(bim)2(cod)2]Cl2∙2H2O [bim=bis-(1-imidazolyl)methane; cod=1, 5-cyclooctadiene]

Published online by Cambridge University Press:  01 March 2012

Norberto Masciocchi ,
Alessandro Figini Albisetti ,
Angelo Sironi ,
Claudio Pettinari  and
Alessandro Marinelli
Norberto Masciocchi
Affiliation:
Dipartimento di Scienze Chimiche e Ambientali, Università dell’Insubria, via Valleggio 11, 22100 Como, Italy
Alessandro Figini Albisetti
Affiliation:
Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, via Venezian 21, 20133 Milano, Italy
Angelo Sironi
Affiliation:
Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, via Venezian 21, 20133 Milano, Italy
Claudio Pettinari
Affiliation:
Dipartimento di Chimica, Università di Camerino, via S.Agostino 1, 62032 Camerino (MC), Italy
Alessandro Marinelli
Affiliation:
Dipartimento di Chimica, Università di Camerino, via S.Agostino 1, 62032 Camerino (MC), Italy
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Abstract

The synthesis and X-ray powder diffraction data for the organometallic [Rh2(bim)2(cod)2]Cl2∙2H2O species are reported. Its crystal and molecular structures were determined by simulated annealing and full-profile Rietveld refinement methods. [Rh2(bim)2(cod)2]Cl2∙2H2O was found to crystallize in the orthorhombic Cmca space group. The lattice parameters were determined to be a=21.3574(6), b=10.7764(3), c=14.2795(4) Å, V=3286.5(2) Å3, for Z=4. The crystal structure was found to contain dimeric [Rh2(bim)2(cod)2]2+ cations, in which the bim ligands bridge Rh(cod) fragments with an intermetallic separation of ca. 8.90 Å. The crystal structure is completed by chloride ions and hydrogen-bonded water molecules, situated in the small cavities of the large cation substructure. The conformation of the bim ligand, lying on a crystallographic mirror plane, is rigorously Cs.

Keywords

powder diffractionrhodiumcyclooctadieneRietveld refinement

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Type
Technical Articles
Information
Powder Diffraction , Volume 22 , Issue 3 , September 2007 , pp. 236 - 240
Copyright
Copyright © Cambridge University Press 2007

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