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Synthesis of Palladium and Platinum Complexes with an NH, NEt‐substituted Benzimidazolin‐2‐ylidene Ligand
Author(s) -
Hervé Alexandre,
Jahnke Mareike C.,
Pape Tania,
Hahn F. Ekkehardt
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300481
Subject(s) - platinum , chemistry , palladium , ligand (biochemistry) , medicinal chemistry , stereochemistry , oxidative addition , molecule , catalysis , organic chemistry , receptor , biochemistry
The compound 2‐chloro‐ N ‐ethylbenzimidazole 1 was synthesized and was reacted with complexes of type [ M (PPh 3 ) 4 ] ( M = Pd, Pt) in the presence of NH 4 BF 4 as proton source. This reaction leads via an oxidative addition to complexes of type [ M Cl(NH, NEt‐NHC)(PPh 3 ) 2 ]BF 4 ( M = Pd, [ 3 ]BF 4 ; M = Pt, [ 4 ]BF 4 ). In case of M = Pd, only compound trans ‐[ 3 ]BF 4 was obtained, while for M = Pt two isomeric platinum complexes cis ‐[ 4 ]BF 4 and trans ‐[ 4 ]BF 4 were obtained in a ratio of 78:22. The molecular structures of the square‐planar complexes trans ‐[ 3 ](BF 4 ) and cis ‐[ 4 ]BF 4 were determined by X‐ray diffraction.