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Abstract.[Cu2(CsH6N2)3(C104)](C104) , Mr=716"4, monoclinic, P2~, a=8.952 (2), b= 14.573 (4), c= 9.912 (3)/~, fl= 94.61 (2) ° , V= 1288.9 (5)/~3 Om = 1.846 (5), D x = 1.85 gcm -3, Z = 2, ,;I,(Mo Ka) = 0.71069,/k, g(MoKa)=19.3cm -1, F(000)=720, T = 295 K, final refinement on F [2520 data with Fo> 6a(Fo), 20max= 55.00] • R =0.048, wR =0.049. The polymeric structure of the title compound consists of a three-dimensional net with all three quinoxaline molecules and one perchlorate ion forming bridges between Cu atoms. The coordination sphere of both Cu atoms is a distorted tetrahedron. The IR spectrum shows bands typical for bridging quinoxaline and perchlorate.

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