1-Ethyl-3-methylimidazolium Based Ionic Liquids Containing Cyano Groups: Synthesis, Characterization, and Crystal Structure
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- 作者：Yukihiro Yoshida ; Koji Muroi ; Akihiro Otsuka ; Gunzi Saito ; Masahide Takahashi ; and Toshinobu Yoko
- 刊名：Inorganic Chemistry
- 出版年：2004
- 出版时间：February 23, 2004
- 年：2004
- 卷：43
- 期：4
- 页码：1458 - 1462
- 全文大小：101K
- 年卷期：v.43,no.4(February 23, 2004)
- ISSN：1520-510X
文摘
New 1-ethyl-3-methylimidazolium (EMI) salts [EMI][C(CN)3] and [EMI][Ag(CN)2] were prepared and characterized.The C(CN)3 salt has a melting point at -11 
C and shows a low viscosity (18 cP) and a high ionic conductivity (1.8× 10-2 S cm-1) at room temperature. This conductivity is less than that of [EMI][N(CN)2] salt (2.7 × 10-2 S cm-1),possibly due to the larger molecular weight of the anion. The first EMI salt containing Ag(I) complexes [EMI][Ag(CN)2] has a higher melting point of 73 C. In the crystal, the C-H···
interionic interactions between cationsconstruct zigzag chains in the cationic two-dimensional layer. Close Ag··Ag interionic contacts of 3.226(1) Å wereobserved in the one-dimensional anionic chain, and the relatively high melting point among the EMI salts with amonoanion appears to be governed essentially by these direct Ag···Ag interactions.
C and shows a low viscosity (18 cP) and a high ionic conductivity (1.8× 10-2 S cm-1) at room temperature. This conductivity is less than that of [EMI][N(CN)2] salt (2.7 × 10-2 S cm-1),possibly due to the larger molecular weight of the anion. The first EMI salt containing Ag(I) complexes [EMI][Ag(CN)2] has a higher melting point of 73 C. In the crystal, the C-H··· interionic interactions between cationsconstruct zigzag chains in the cationic two-dimensional layer. Close Ag··Ag interionic contacts of 3.226(1) Å wereobserved in the one-dimensional anionic chain, and the relatively high melting point among the EMI salts with amonoanion appears to be governed essentially by these direct Ag···Ag interactions.