丁基咪唑盐银配合物的合成与结构

The synthesis and structure of imidazolium silver complex [[(CH_3CH_2CH_2CH_2{(CHNCHCHN) }CH_2]_2]_n^(2+)[(Ag_2Br_4) ]_n^(2-)

桥联咪唑盐溴化物[[(CH_3CH_2CH_2CH_2{(CHNCHCHN)}CH_2]_2]^(2+)2Br-与Ag_2O按照摩尔比2:1在DMSO溶液中高温回流成功合成1,2亚乙基-3,3’-二丁基-二咪唑基四溴化银离子金属配合物[[(CH_3CH_2CH_2CH_2{(CHNCHCHN)}CH_2]_2]n^(2+)[(Ag_2Br_4)]n^(2-).配合物通过了元素分析,1H NMR和X-ray衍射表征.晶体的结构表明晶体属于单斜晶系,空间群为P2(1)/c,化学式为C_(16)H_(28)Ag_2Br_4N_4,化合物晶胞参数为α=90.00°,β=96.363 0(10)°,γ=90.00°,a=0.668 00(5)nm,b=1.873 64(15)nm,c=1.891 35(16)nm,Z=4,F(000)=1 544.00,最终R=0.143 7,WR2=0.374 9.化合物由阴阳离子构成,阳离子是桥联双咪唑离子,阴离子是由Br离子和Ag离子交替形成四元环,再通过Ag-Ag键相互作用将四元环联接起来,从而形成聚合阴离子,其中的阴离子采取扭曲的四面体构型.

The title complex [[（CH_3CH_2CH_2CH_2{（CHNCHCHN）}CH_2]_2]-（2＋）2Br-与Ag_2O has been synthesized by the reaction of the bridged imidazolium bromide [[（CH_3CH_2CH_2CH_2{（CHNCHCHN）}CH_2]_2]n-（2＋）[（Ag_2Br_4）]n-（2-）with Ag20 in a 1：2 molar ratio at refluxing in DMSO. The compound has been characterized by elemental analysis, 1 H NMR and single - crystal X - ray diffraction. The crystal belongs to monoclinic system with space group P2（ 1 ）/c, with a =90.00% ,β =96. 3630（10） ° ,y =90.00° ,a =0.66800（5） nm,b = 1. 87364 （15） nm,c=1.89135（16） nm,Z=4,F（000） = 1544.00, R=0.1437,WR2 =0.3749. The complex is com- posed of anions and Cation. The Cation is a bridged imidazolium, the anion is a four - member ring structure bridged by Ag and Br. The Ag atom adopts a tetrahedral structure.