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Copper(I) Complexes of Phenanthro‐Annulated N‐Heterocyclic Carbenes: Synthesis and Transmetalation Reactions
Author(s) -
Mormul Jaroslaw,
Steimann Manfred,
Nagel Ulrich
Publication year - 2014
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.201301499
Subject(s) - transmetalation , chemistry , rhodium , carbene , copper , acetonitrile , chloroform , medicinal chemistry , polymer chemistry , aqueous solution , organic chemistry , inorganic chemistry , catalysis
Copper(I) complexes with phenanthro‐annulated N‐heterocyclic carbene ligands were prepared by reaction of imidazolium salts with copper(I) oxide. Transmetalation of the copper complexes with [RhCl(cod)] 2 in usual solvents like CH 2 Cl 2 led to an equilibrium between the reactants and the products. For rhodium complexes 4 and 5 this equilibrium could be shifted to the product side by carrying out the reaction in acetonitrile. The ester functionalized rhodium complex 6 was prepared in a two phase mixture of chloroform and aqueous CaCl 2 starting from copper complex 3c . The rhodium complexes were characterized by NMR and X‐ray measurements.