Rhodium and Iridium Complexes with Chelating C–C′-Imidazolylidene–Pyridylidene Ligands: Systematic Approach to Normal, Abnormal, and Remote Coordination Modes
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http://dx.doi.org/10.1021/om3005096 |
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Title
Rhodium and Iridium Complexes with Chelating C–C′-Imidazolylidene–Pyridylidene Ligands: Systematic Approach to Normal, Abnormal, and Remote Coordination ModesDate
2012Publisher
American Chemical SocietyISSN
1520-6041; 0276-7333Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/pdf/10.1021/om3005096Abstract
A series of linked imidazolium−pyridinium salts
([Him-pyH](X)2
) have been used as imidazolylidene−
pyridylidene ligand precursors for the preparation of rhodium-
(III) and iridium(III) complexes. The relative ... [+]
A series of linked imidazolium−pyridinium salts
([Him-pyH](X)2
) have been used as imidazolylidene−
pyridylidene ligand precursors for the preparation of rhodium-
(III) and iridium(III) complexes. The relative configuration of
the [Him-pyH](X)2
salts determines whether the coordination
of the pyridylidene occurs through the normal, abnormal, or
remote form. In order to obtain complexes with the
imidazolylidene part of the ligand coordinated through the
abnormal form, salts with the C2 position of the imidazolium
blocked with a methyl group were used, although the products
resulting from the C−H aliphatic activation of the methyl
group or the C−C cleavage of the C2−Me bond were
obtained instead. The crystallographic study of three molecules allowed us to evaluate the relative trans influence of the normal,
abnormal, and remote coordination forms of the pyridylidene and also to compare it to the trans influence provided by the
imidazolylidene. [-]
Is part of
Organometallics, 2012, 31 (14)Rights
© 2012 American Chemical Society
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