Bulky pyrazole as ligands in rhodium(I) complexes. Crystal structure of chlorodicarbonyl (3- p-methoxyphenylpyrazole)rhodium(I)

A new family of complexes containing bulky pyrazoles substituted in the 3 or the 3 and 5 positions, [RhCl(L 2)(Hpz R′,R″)] (L 2  NBD, 2CO; R′  Bu t, Ph, p-CH 3OC 6H 4 (An), R″  H; R′  Bu t, Ph, R″  CH 3; R′  R″  H, CH 3), has been obtained. A dynamic behaviour has been observed only in comple...

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Bibliographic Details
Published in:Polyhedron 1995-05, Vol.14 (9), p.1139-1147
Main Authors: Cano, Mercedes, Campo, Jose A, Heras, Jose V, Lafuente, Javier, Rivas, Carmen, Pinilla, Elena
Format: Article
Language:English
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Summary:A new family of complexes containing bulky pyrazoles substituted in the 3 or the 3 and 5 positions, [RhCl(L 2)(Hpz R′,R″)] (L 2  NBD, 2CO; R′  Bu t, Ph, p-CH 3OC 6H 4 (An), R″  H; R′  Bu t, Ph, R″  CH 3; R′  R″  H, CH 3), has been obtained. A dynamic behaviour has been observed only in complexes with the less demanding pyrazole ligands, relating with a metallotropic equilibrium when R′  R″  H, Me, or a diolefin reorientation when R′  Bu t, Ph, An, R″  H. The X-ray crystal structure of [RhCl(CO) 2(Hpz An)] has been solved, showing a molecular stacking with a RhRh separation of 3.398(3) Å along the one-dimensional chain.
ISSN:0277-5387
DOI:10.1016/0277-5387(94)00382-O