| Popis: |
The synthesis of 2,7-diphenyl-azo-1,8-naphthyridine (dpan) and its reaction with copper(I) are described. The X-ray study of the new entity [Cu 2 (dpan) 3 ](BF 4 ) 2 ( 1 ) reveals its molecular structure with two coppers separated by a distance of 3.526(1) A. The distorted tetrahedral environment about each copper is provided by one bridging tetradentate dpan ligand and the two remaining bidentate dpan ligands. The stabilization of the molecule may, in part, be due to a stacking interaction between the two bidentate dpan ligands. The weak interaction between. the copper(I) centers is confirmed by the electrochemical studies in CH 3 CN. 1 ·CH 2 CL 2 ,2C 6 H 6 ,CH 3 OH crystallizes in the triclinic space group P 1 (No. 2), a =15.443(7), b =19.826(7), c =13.763(6) A, α=108.90(2), β=113.21(2), γ=73.12(2)°, Z =2 and V =3599 A 3 at −100 °C. The structure was refined to R =6.6 and R w ,=10.3%, respectively, using 5876 reflections with I >3σ( I ) and 973 variables. |
