Microwave‐assisted Synthesis, Crystal Structures, and Thermal Stability of C 11 H 10 N 2 Cu 2 Br 3 and C 22 H 20 N 4 Cu 8 I 10

Complexes of C 11 H 10 N 2 Cu 2 Br 3 ( 1 ) and C 22 H 20 N 4 Cu 8 I 10 ( 2 ) [C 22 H 20 N 4 = 1,1"‐(1,2‐ethanediyl)‐bis‐4,4′‐bipyridinium] were synthesized via the microwave‐assisted solvo‐thermal reactions of C 22 H 20 N 4 Br 2 , CuSO 4 · 5H 2 O, and NaX (X = Br, I) and characterized by XRD, FTIR, and thermogravimetric analysis. The crystal structures were determined by single‐crystal X‐ray diffraction analyses. C 11 H 10 N 2 Cu 2 Br 3 crystallized in the monoclinic space group C 2/ c (no. 15) with lattice parameters a = 24.658(3) Å, b = 6.71(9) Å, c = 17.368(9) Å, β = 98.274(1)°, V = 2847.7(1) Å 3 , whereas C 22 H 20 N 4 Cu 8 I 10 crystallized in the monoclinic space group P 2 1 / n (no. 14) with lattice parameters a = 7.392(2) Å, b = 20.809(7) Å, c = 25.412(7) Å, β = 92.06(8) °, V = 3906.6(8) Å 3 . Complex 1 showed a 2D layered structure composed of [Cu 4 Br 6 ] – chains connected via 1,1"‐(1,2‐ethanediyl)‐bis‐4,4′‐bipyridinium ligands. Complex 2 possessed a 3D framework, in which puckered [Cu 8 I 10 ] 2– layers were linked by organic ligands. The thermogravimetric analysis indicated that both two complexes were stable up to 230 °C and 170 °C, respectively.