Chromium complexes supported by phenanthrene-imine derivative ligands: synthesis, characterization and catalysis on isoprenecis-1,4 polymerization†
Abstract
Reactions of CrCl2(THF)2 with N-aryl-9,10-iminophenanthraquinone in CH2Cl2 give the monoimine chromium complexes ArIPQCrCl2(THF)2 (1, Ar = 2,6-Me2C6H3; 2, Ar = 2,6-Et2C6H3; 3, Ar = 2,6-iPr2C6H3). Molecular structures of 1 and 3 were revealed to be monomeric with the chromium atoms in distorted octahedral geometries. Similar reactions of CrCl2(THF)2 with N,N-bis(arylimino)phenanthrene