咪唑盐四环溴化银聚合物［［（CH3CH2｛（CHNCHCHN）｝CH2］2］n2＋［（Ag2Br4）］n2﹣的合成与结构

摘要

The reaction of the NHC Precursor[CH3 CH2(CHNCHCHN)CH2 ]2 2 +[Br]2 2 ﹣ with Ag2 O in a 1:2 molar ratio at 45 ℃ in CH3 CN yields the title comPlex [[( CH3 CH2{( CHNCHCHN )}CH2 ]2 ]n2 +[(Ag2 Br4 )]n2 ﹣ . The title comPound has been characterized by 1 HNMR and single ﹣ crystal X ﹣ ray diffraction and TGA analysis. Ⅰt crystallizes in monoclinic,sPace grouP P21 / c with a = 13. 862(4)/ nm,b = 12. 822(3)m,c = 11. 447(3)/ nm,α = 90. 00°,β = 113. 277(5)°,γ = 90. 00°,V = 1869. 0(9)nm3 ,Z = 2 ,D = 2. 621 0Mg / m3 ,μ = 7. 492 / mm ﹣ 1 and F(000)= 1108. 00. The structure was refined to R1 = 0. 0296 and wR2 =0. 0765 for 1696 observed reflections with F2 ﹥ 2σ(F2). The title salt consists of a carbon ﹣ bridged imidazoli-umcation[(CH3 CH2{(CHNCHCHN)}CH2 ]2 2 + and a 4th ﹣ ring silver bromide Polymer anionic[Ag2 Br4 ]2 ﹣ .%氮杂环卡宾前体[CH3 CH2（CHNCHCHN）CH2]22＋[Br]22﹣与 Ag2 O 在45℃下在乙腈溶液中以1：2的摩尔比反应成功合成四环溴化银聚合物1，2﹣亚乙基，3，3＇﹣乙基咪唑[[（CH3 CH2｛（CHNCHCHN）｝CH2]2]n2＋[（Ag2 Br4）]n2﹣，产物通过元素分析，1 HNMR 和 X ﹣ ray 衍射及差热分析表征.晶体结构表明配合物属于单斜晶体，空间群均为 P2（1）/ c，化合物晶胞参数 a =13.862（4）nm，b =12.822（3）nm，c =11.447（3）nm，α=90.00°，β=113.277（5）°，γ=90.00°，V =1869.0（9）nm3，Z =2，F（000）=1108.00，D =2.6210 Mg/ m3，μ=7.492 mm ﹣1， R1=0.0296，wR2=0.0765.化合物由双咪唑阳离子[（CH3 CH2｛（CHNCHCHN）｝CH2]22＋和四环溴化银阴离子[Ag2 Br4]2﹣构成.