Sangtrirutnugul Preeyanuch, Haesuwannakij Setsiri, Sooksimuang Thanasat, Prabpai Samran, Kongsaeree Palangpon
Acta Crystallogr Sect E Struct Rep Online. 2011 Feb 5;67(Pt 3):m299-300. doi: 10.1107/S1600536811003588.
The title salt, (C(19)H(18)NO(2))(2)[Cu(2)Br(6)], was obtained from an attempt to synthesize the copper(II) complex of 2,6-bis-(2-meth-oxy-phen-yl)pyridine (L) from a reaction between CuBr(2) and one equivalent of L in CH(2)Cl(2) at room temperature. The resulting compound is the salt of the 2,6-bis-(2-meth-oxy-phen-yl)pyridinium cation and 0.5 equivalents of a hexa-bromido-dicuprate(II) dianion. Both meth-oxy groups of the cationic pyridinium moiety are directed towards the N atom of the pyridine ring as a result of intra-molecular N-H⋯O hydrogen bonds. The centrosymmetric hexabromidodicuprate dianion possesses a distorted tetra-hedral geometry at the copper ion. The Cu-Br bond lengths are 2.3385 (7) and 2.3304 (7) Å for the terminal bromides, whereas the bond length between the Cu atom and two bridging bromides is slightly longer [2.4451 (6) Å].
标题盐（C₁₉H₁₈NO₂）₂[Cu₂Br₆]是通过在室温下于二氯甲烷中使溴化铜（CuBr₂）与一当量的2,6-双（2-甲氧基苯基）吡啶（L）反应来尝试合成2,6-双（2-甲氧基苯基）吡啶铜（II）配合物时得到的。所得化合物是2,6-双（2-甲氧基苯基）吡啶鎓阳离子与0.5当量的六溴二铜酸（II）二价阴离子形成的盐。由于分子内N-H⋯O氢键的作用，阳离子吡啶鎓部分的两个甲氧基均指向吡啶环的N原子。中心对称的六溴二铜酸根二价阴离子在铜离子处具有扭曲的四面体几何构型。对于末端溴化物，Cu-Br键长为2.3385（7）和2.3304（7）Å，而Cu原子与两个桥连溴化物之间的键长稍长[2.4451（6）Å]。
