1-Ethyl-3-methylimidazolium Based Ionic Liquids Containing Cyano Groups: Synthesis, Characterization, and Crystal Structure
- 20 January 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 43 (4) , 1458-1462
Abstract
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···π interionic interactions between cations construct zigzag chains in the cationic two-dimensional layer. Close Ag··Ag interionic contacts of 3.226(1) Å were observed in the one-dimensional anionic chain, and the relatively high melting point among the EMI salts with a monoanion appears to be governed essentially by these direct Ag···Ag interactions.Keywords
This publication has 33 references indexed in Scilit:
- Physicochemical Properties of 1,3-Dialkylimidazolium Fluorohydrogenate Room-Temperature Molten SaltsJournal of the Electrochemical Society, 2003
- Ionic liquids based on imidazolium, ammonium and pyrrolidinium salts of the dicyanamide anionGreen Chemistry, 2002
- Room temperature molten fluorometallates: 1-ethyl-3-methylimidazolium hexafluoroniobate(V) and hexafluorotantalate(V)Journal of Fluorine Chemistry, 2002
- Pulsed-Gradient Spin−Echo 1H and 19F NMR Ionic Diffusion Coefficient, Viscosity, and Ionic Conductivity of Non-Chloroaluminate Room-Temperature Ionic LiquidsThe Journal of Physical Chemistry B, 2001
- Room temperature ionic liquids of alkylimidazolium cations and fluoroanionsJournal of Fluorine Chemistry, 2000
- A Room-Temperature Molten Salt Prepared from AuCl3 and 1-Ethyl-3-methylimidazolium ChlorideInorganic Chemistry, 1999
- Hydrophobic, Highly Conductive Ambient-Temperature Molten SaltsInorganic Chemistry, 1996
- Evidence for hydrogen bonding in solutions of 1-ethyl-3-methylimidazolium halides, and its implications for room-temperature halogenoaluminate(III) ionic liquidsJ. Chem. Soc., Dalton Trans., 1994
- Synthesis and structure of Rb[Cd{Ag(CN)2}3] containing three independent, interpenetrating α-polonium-related netsJournal of the Chemical Society, Chemical Communications, 1994
- Upon the structure of room temperature halogenoaluminate ionic liquidsJournal of the Chemical Society, Chemical Communications, 1986