Photochemistry and Redox Chemistry of an Unsymmetrical Bimetallic Copper(I) Complex
dataset
posted on 2016-09-13, 14:34 authored by Oliver Back, Jana Leppin, Christoph Förster, Katja HeinzeThe bimetallic copper(I)
complex Cu2L2 (cis-1) is formed with high diasteroselectivity
from [Cu(NCCH3)4][BF4] and HL (4-tert-butyl phenyl(pyrrolato-2-yl-methylene)amine)
in a kinetically controlled reaction. cis-1 features a rather short Cu···Cu distance
of 2.4756(6) Å and is weakly emissive at room temperature in
solution. Oxidatively triggered disproportionation of cis-1 yields elemental copper and the
mononuclear copper(II) complex CuL2 (trans-2). One-electron reduction
of trans-2 gives cuprate [2]– with a bent bis(pyrrolato)
coordinated copper(I) entity. The imine donor atoms of [2]– can insert an additional copper(I)
ion giving exclusively the bimetallic complex cis-1 closing the oxidation–elimination–reduction–insertion
cycle.
