四溴合铜(Ⅱ)-对溴苄基吡啶鎓盐的合成和晶体结构

Synthesis and crystal structure of a tetrabromocuprate(Ⅱ)-p-bromobenzylpyridinium salt

通过CuBr2和[4-BrBzPy]Br([4-BrBzPy]+为1-(4'-溴苄基)吡啶鎓离子;Py为吡啶)直接在含氢溴酸的乙腈中反应得到了一种新的吡啶鎓盐[4-BrBzPy]2[CuBr4]。用元素分析、红外光谱、电子喷雾质谱和X-射线衍射表征了其组成和结构。所合成的吡啶鎓盐由1个四面体形的[CuBr4]2-阴离子和和2个[4-BrBzPy]+阳离子组成。其中阳离子通过苯环之间的π…π堆积作用形成准一维的柱,并通过C-H…Br氢键与[CuBr4]2-阴离子相连。

A new salt,[4-BrBzPy]2in which[4-BrBzPy]＋,was prepared by the direct reaction of CuBr2 and[4-BrBzPy]Br in MeCN acidized by hydrobromic acid.The composition and structure of the salt were characterized by elemental analysis,IR,ESI-MS,and single crystal X-ray diffraction.The salt consists of two[4-BrBzPy]＋ cations and a tetrahedral2-anion.The cations form a quasi-one-dimensional column throughπ…πstacking interactions between the phenyl ring,and link with the2-anions through C-H…Br hydrogen bonds.