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Synthesis and Single‐Crystal X‐ray Diffraction Studies of New Cyclometallated Phenylimidazole Palladium(II) Compounds
Author(s) -
Lousame Mariela,
Fernández Alberto,
LópezTorres Margarita,
VázquezGarcía Digna,
Vila José M.,
Suárez Antonio,
Ortigueira Juan M.,
Fernández Jesús J.
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200009)2000:9<2055::aid-ejic2055>3.0.co;2-4
Subject(s) - chemistry , palladium , crystal structure , medicinal chemistry , x ray crystallography , ligand (biochemistry) , chloride , single crystal , chelation , x ray , bridging ligand , stereochemistry , crystallography , organic chemistry , diffraction , catalysis , receptor , physics , optics , biochemistry , quantum mechanics
Cyclometallation of 1,4,5‐trimethyl‐2‐phenylimidazole, L , with Pd(OAc) 2 gave exclusively the dinuclear anti isomer with bridging acetate ligands, 1 . Subsequent treatment of 1 with sodium chloride gave the corresponding dinuclear compound with bridging chloride ligands, 2 . Treatment of 2 with mono or diphosphanes led to partial or total bridge‐splitting reactions, yielding mono or polynuclear compounds, 3−9 , depending on the palladium/phosphane ratio and the nature of the phosphane. The structure of 7 has been determined by X‐ray diffraction analysis. Compounds 1 and 2 react with triphos to give the mononuclear compound, 10 , in which the phosphane acts as a terdentate ligand. The crystal structure of 10 confirms the pentacoordination of the palladium(II) centre, involving a long Pd−N interaction.