Synthesis and Characterisation of (Alkoxybenzimidazolin‐2‐ylidene)palladium Complexes: The Effect of Ancillary Ligands on the Behaviour of Precatalysts
作者:Murray V. Baker、David H. Brown、Peter V. Simpson、Brian W. Skelton、Allan H. White
DOI:10.1002/ejic.200801154
日期:2009.5
A series of new N-heterocyclic carbene (NHC)–palladium(II) complexes bearing electron-rich benzimidazolin-2-ylidene ligands are described and structurally and spectroscopically characterised. These (benzimidazolin-2-ylidene)palladiumcomplexes bear butoxy groups to increase the solubility and perhaps influence the catalytic activity by increasing the electron density around the metal centre. The effect
Azolium-Linked Cyclophanes: Effects of Structure, Solvent, and Counteranions on Solution Conformation Behavior
作者:Murray V. Baker、David H. Brown、Charles H. Heath、Brian W. Skelton、Allan H. White、Charlotte C. Williams
DOI:10.1021/jo801860d
日期:2008.12.5
of some xylyl-linked imidazolium and benzimidazolium cyclophanes decorated with alkyl or alkoxy groups. The addition of alkyl/alkoxy chains to the cyclophanes allows for studies in chlorinated solvents, whereas previous solution studies of azolium cyclophanes have generally required highly polar solvents. The azolium cyclophanes may exist in a syn/syn conformation (azolium rings mutually syn, arene rings