【Abstract】 The complex Cu2(μ dppb)2(μ Cl)2 has been synthesized from the reaction of CuCl, dppb and (n Bu)4NCl. The crystal belongs to the triclinic with space group . The unit cell parameters are: a=9.939(4)?, b=10.083(6)?, c=14.104(5)?, α=76.46(3)°, β=71.02(2)°, γ=70.87(5)°. The single crystal X ray diffraction analysis reveals that it has a bi ring structure with a symmetry center at the middle of two Copper atoms. The outer ring is a 14 membered ring of Cu dppb Cu dppb, and the inner ring is a 4 membered ring composed of two Cl- and two Cu?. Investigation of third order optical nonlinearity shows that it exhibits considerable nonlinear absorptive and self defocusing effect with α2=1.75×10-13m·W-1 and n2=3.19 ×10-18m2·W-1. CCDC: 193113.更多还原