Synthesis and characterization of an unexpected asymmetric binuclear copper(I) complex containing 4‐vinyl‐pyridine

The asymmetric binuclear copper(I) complex [Cu 2 (dppm) 2 (C 7 H 7 N)(μ‐HCOO)](NO 3 ) (dppm=Ph 2 PCH 2 PPh 2 , C 7 H 7 N=4‐vinyl‐pyridine) has been prepared and characterized by physicochemical and spectroscopic methods. The complex is photoluminescent at room temperature. It crystallizes in triclinic system, space group P‐ 1 with a= 1.2719(3) nm, b =1.8637(4) nm, c =1.1656(2) nm, a =97.16(3)°, β= 104.94(3)″, γ=89.39(3)°, V=2.648.1(9) nm 3 , D c = 1.390 g.m −3 , Z=2, μ=0.974 mm −1 , R =0.0483 for 5716 independently observed reflections with I>2δ( I ). The structure consists of [Cu 2 (dppm) 2 (C 7 H 7 N)(μ‐HCOO)] + cations and nitrate anions. The copper atoms show different coordination modes: Cu(1) displays a distorted trigonal and Cu(2) a tetrahedred geometry.