Positional Isomerism in the N^N Ligand: How Much Difference Does a Methyl Group Make in [Cu(P^P)(N^N)]+ Complexes?

ABSTRACT: The synthesis and structural characterization of 5,6'-dimethyl-2,2'-bipyridine (5,6'-Me2bpy) are reported, along with the preparations and characterizations of [Cu(POP)(5,6'-Me2bpy)][PF6] and [Cu(xantphos)(5,6'-Me2bpy)][PF6] (POP = bis(2-(diphenylphosphanyl)phenyl)ether, xantphos = 4,5-bis(diphenylphosphanyl)-9,9-dimethyl-9H-xanthene). Single-crystal X-ray structure determinations of [Cu(POP)(5,6'-Me2bpy)][PF6] and [Cu(xantphos)(5,6'-Me2bpy)][PF6] confirmed distorted tetrahedral copper(I) coordination environments with the 5-methylpyridine ring of 5,6'-Me2bpy directed towards the (C6H4)2O unit of POP or the xanthene unit of xantphos. In the xantphos case, this preference may be attributed to C-H…π interactions involving both the 6-CH unit and the 5-methyl substituent in the 5-methylpyridin

SUBMITTER: Brunner F 

PROVIDER: S-EPMC7356218 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature