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Molecular Recognition Utilizing Complexes with NH,NR‐Stabilized Carbene Ligands
Author(s) -
Meier Nicole,
Hahn F. Ekkehardt,
Pape Tania,
Siering Carsten,
Waldvogel Siegfried R.
Publication year - 2007
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/ejic.200601258
Subject(s) - chemistry , carbene , transmetalation , rhodium , ligand (biochemistry) , titration , substrate (aquarium) , medicinal chemistry , hydrogen bond , tungsten , polymer chemistry , catalysis , stereochemistry , organic chemistry , molecule , biochemistry , oceanography , receptor , geology
Tungsten complex [W(NHC)(CO) 5 ] ( 1 ) (NHC=NH,N‐ethyl‐substituted benzimidazolin‐2‐ylidene ligand) was prepared by transmetallation of lithiated 1‐ethylbenzimidazole with the pentacarbonyltungsten complex fragment. The hydrogen‐bonding ability of the carbene‐NH group to substrates with carbonyl groups was investigated by NMR titration. Structural analogues to 1 with a catalytically active rhodium center show a distinct substrate‐selective hydrogenation behaviour.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)