氮杂环卡宾银碘化物[Ag(MEIm)2]+[AgI2]-的合成、结构与催化性能(MEIm=1-methy1-3-ethy1-imidazolyl).pdf

第28卷第1期
无机化学学报
Vol 28 No.1
2012年1月
CHINESE JOURNAL OF INORGANIC CHEMISTRY
191-194
氮杂环卡宾银碘化物[Ag(MEIm)][AgI】的合成、结构与催化性能
(MEIM=1-methyl-3-ethyl-imidazolyd)
王志国*边清泉黄宝美邓榖刘思曼
(绵阳师范学院化学与化学工程学院,绵621000
摘要:常温下(MEIm)T(MIm=1- methyl-3- ethyl-imidazolyl与Ag:0按照物质的量比为12在DMSO中反应成功的合成了线型氮
杂环卡宾银碘化物[Ag( MELM) Ag2,化合物通过了元素分析,HNMR,X-may行射表征。配合物属于单斜晶系,空间群为C2/m,
=1.5925(4)nm,b=0.67907(14)nm,c-0.9271(2)nm,3=10.247(5)°,V=-0.9407(4)nm,M-=689.86,7=8,D.=2.436g-cem3,l(MoKa)=
5.36mm1,f(000=-640,R=-0.036,1R=-0.105。配合物由阴阳离子对构成,配阳离子中2个卡宾碳原子与银原子呈线型结构。目标
化合物对L- lactid的聚合具有高的催化活性。
关键词:氮杂环;卡宾;银;晶体结构;催化性能
中图分类号:0614.122
文献标识码:A
文章编号:1001-4861(2012)01-0191-04
Synthesis, Crystal Structure and Catalytic Behavior of Linear N-heterocyelie
Carbene Silver [Ag(MEIM)2] [ Agi, I(MEIM=1-methyl-3-ethyl-imidazolyl)
WANG ZHI-GUO*BIAN Qin-quan HUANG Bao-mei DENG Yi LU Si-man
( Department of Chemistry and Che mical Engineering, Mianyang Normad liniversity, Miryang, Sichuan 621000, China)
Astract: The ite mplex A ME m) A l I(MEM=l-methyl-3-eth 1-imidazolyl )has been synthesized
reaction of Ag0 with (MEIM)"I in a 1 2 molar ratio at room temperature in DMSO, and characterized by
elemental analysis, H NMR and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic system,
space group C2/ m with a=1.5925(4)nm,b=0.67907(14)nm,c=0.9271(2)nm,B=110.247(5)°,V=0.9407(4)nm,
M=68986, Z=8 D =2. 436 g m, (M K) =5. 36 mm and F(000)=640. The structure was refined to R=0.0366
and WR=0.1426 for 728 observed reflections with 1>20(1. The cation has a typical linear conformation of
Eagetimg] with a C-ag-c angle of 180. The catalytic behavior of the tie complex has been investigated, the
results indicate the title complex has a highly catalytic activation for L-jactide polymerization. CCDC: 843657
Key words: N-heterocyelic carbene; carbene; silver; crystal structure; catalytic behavior
Silver and other transition metal N-heterocyelic published by Arnold, Lin and Vasam2. The product
carbene complexes have been played important role in molecular structure differs depending upon reaction
the development of metal carbene systems for conditions and the imidazolium salt used. T'o date, a
transmetalation reactions. The silver oxide is the most variety of structures of N-heterocyclic carbene silver
commonly used metal base for the purposes. Recent complexes have been reported, which include
review dealing with silver N-heteroeyelic carbenes were mononuclear complexes with one or two carbenes
收稿日期:2011-04-29。收修政稿目期:2011-08-27。
四川省科技厅应用基础基金(2009Y0075资助项目。
*通讯联系人。E-mail:wangzhiguo224865@163.com