Three-dimensional Copper (I) Halide Based Coordination Networks with Asymmetrically Substituted Bridging N-Donor Ligands

摘要

The discrete complex [(CuI)_2(pyzCN)_4] (1) and the coordination polymers _(infinity)~1[(CuI)(pyzCN)] (2) and _(infinity)~3[(CuX)_3(pyzCN)_2] (3, 4; X = Br, Cl) may be prepared from the respective copper (I) halide CuX and 2-cyanopyrazine (pyzCN) by self-assembly in acetonitrile solution at 100-120 deg C. Whereas 2 exhibits _(infinity)~1[CuI] staircase double chains as its characteristic substructure, the three-dimensional networks of 3 and 4 contain single zigzag CuX strings. The influence of the copper (I) halide on both the connectivity pattern and the dimensionality of a resulting coordination network is particularly apparent for the 1:1 complexes _(infinity)~1[(CuI)(pymMe)] (5), _(infinity)~3[(CuBr)_3(pymMe)_3]. (6) and _(infinity)~2[(CuCl)_2(pymMe)] (7), which were generated by reaction of CuX with 4-methylpyrimidine (pymMe) under reaction conditions similar to those above.