Photochemistry and Redox Chemistry of an Unsymmetrical Bimetallic Copper(I) Complex.
The 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.
Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany.
Oliver
O
Back
Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany.
Jana
J
Leppin
Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany.
Christoph
C
Förster
Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany.
Katja
K
Heinze