1- Hexyl-3-methylimidazolium tetrafluoroborate

Tomida D, Kenmochi S, Tsukada T, Qiao K, Bao Q, Yokoyama C (2012) Viscosity thermal conductivity of 1-hexyl-3-methylimidazolium tetrafluoroborate and l-octyl-3-methylimi-dazolium tetrafluoroborate at pressures up to 20 MPa. Int J Thermophys 33 959-969... 

Letcher, T. M. Reddy, P. (2005). Ternary (liquid + liquid) equilibria for mixtures of 1-hexyl-3-methylimidazolium (tetrafluoroborate or hexafluoroborate)+ benzene+an alkane atT=298.2 K andp=0.1 MPa, /, Chem. Thermodyn. 37,415-421, ISSN 0021-9614. Letcher, T. M. Deenadayalu, N. Soko, B. Ramjugernath, D. Naicker, P. K. (2003). Ternary liquid-liquid equilibria for mixtures of l-methyl-3-octylimida-zolium chloride + an alkanol + an alkane at 298.2 K and 1 bar. /. Chem. Eng. Data, 48, 904-907, ISSN 1520-5134. 

Letcher, T.M. and Reddy, R, Ternary liquid-liquid equilibria for mixtures of l-hexyl-3-methylimidazolium (tetrafluoroborate or hexafluoroborate) + benzene + an alkane at T = 298.2 K and 1 atm, /. Chem. Thermodyn., 37, 415,2005. 

Letcher, T.M. et al.. Determination of activity coefficients at infinite dilution of solutes in the ionic liquid l-hexyl-3-methylimidazolium tetrafluoroborate using gas-liquid chromatography at the temperatures 298.15 K and 323.15 K, /. Chem. Eng. Data, 48, 1587, 2003. 

The aldol reactions were also p>erformed in ionic liquid solvents namely N,N-diethyl-N -hexyl-N -methyl-N",N"dipropylguanidinimn iodide and the commercially available 1-butyl-3-methylimidazolium tetrafluoroborate [bmimJpFJ (Shah, Khan et al. 2009). Equimolar ratios of cyclohexanone and 4-bromobenzaldehyde were used and the reaction mixture was extracted with diethyl ether. The guanidinium salt gave improved results than the neat reaction. Application of the commercially available [bmimjpFJ resulted in a rapidly diminishing enantioselectivity for the recycling. 

The beneficial effects of several ionic liquids as mobile phase additives in HPLC using an electrochemical detection for the determination of heterocyclic aromatic amines have been evaluated (2). The tested ionic liquids were l-butyl-3-methyhmidazolium tetrafluoroborate, l-hexyl-3-methylimidazolium tetrafluoroborate, and... 

The compounds l-ethyl-3-methylimidazolium tetrafluoroborate ([EMlm][BF4]), l-butyl-3-methylimidazolium tetrafluoroborate ([B-Mlm][BF4]), l-hexyl-3-methylimidazolium tetrafluoroborate ([H-Mlm][BF4]) and l-butyl-3-methylimidazolium bromide ([BMlm]-[Br]) were used as ionic liquids. Some of these compounds are shown in Figure 1.7. Some properties are summarized in Table 1.3. 

Modified graphene oxide was prepared using alkyl imidazol-ium ionic liquids (l-butyl-3-methylimidazolium tetrafluoroborate, l-butyl-3-methylimidazolium hexafluorophosphate and l-hexyl-3-methyhmidazolium bis(trifluoromethylsulfonyl) amide via an epoxide ring-opening reaction, cation-p stacking, or van der Waals interactions, with modified graphene exfoliated from a graphite rod by a moderate electrochemical method as a a comparative material (3). 

Ionic liquids l-ethyl-3-methylimidazolium diethylphosphate EMIMDEP, l-butyl-3-methylimidazolium hexafluorophosphate EMIMPF6, l-hexyl-3-methylitnidazolium chloride HMIMCl, l-butyl-3-methylimidazolium trifluoromethanesulfonate BMIM OTf, l-butyl-3-methylimidazolium tetrafluoroborate EMIMEF4, trihexyltetradecylphosphonium chloride HPCl, and l-butyl-3-methylimidazolium chloride EMIMCl were sup>plied by Alrdich. Composition of a typical elastomer mixture rubber - 100 phr, DCP - 2 phr, TAC - 0.5 phr, ZnO - 5 phr, MET - 2 phr, S - 2 phr, Ionic liquids - 3 phr, filler 20-100 phr. 

A series of dinitrophenylated amino-acids was studied in biphasic systems based on 1-decyl-3-methylimidazolium tetrafluoroborate and l-hexyl-3-methylimidazolium tetrafluoroborate at slightly basic conditions fixed at 7.4 using sodium phosphate buffer (Rodriguez et al., 2007). Authors observed that amino-acids distribute preferentially to the ionic liquid phase according to the length of their chain. 

Beigi AAN, Abdouss M, Yousefi M, Pourmortazavi AM, Vahid A (2013) Investigation on physical and electrochemical properties of three imidazolium based ionic liquids (l-hexyl-3-methylimidazolium tetrafluoroborate, l-ethyl-3-methylimidazolium bis(trifluoromethyl-sulfonyl) imide and l-butyl-3-methylimidazolium methylsulfate). J Mol Liq 177 361-368... 

Costantini, M Toussaint, V. A. Shariati, A. Peters, C. J. Kikic, 1. (2005). High-pressure phase Behavior of systems with ionic liquids Part IV. Binary system carbon dioxide+l-hexyl-3-methylimidazolium tetrafluoroborate. /. Chem. Eng. Data, 50, 52-... 

When Br0nsted acidic ILs l-hexyl-3-methylimidazolium tetrafluoroborate [HMIM]BF4 (Lu et al., 2007) and N-methyl-pyrrolidonium tetrafluoroborate [HNMP]Bp4 (Zhao et al., 2007) were used for desulfurization in the presence of H2O2, sulfur compounds can be deeply removed due to formation of hydroxyl radicals. For [HMIM]BF4the DBT remotion was 93% when a mixture of 3.2 mL of model oil and 5.0 mL of the IL were stirring at 90 °C during 6 h. In the case of [HNMP]BF4 the efficiency of sulfur extraction was 99.4% for fuel diesel (total sulfur 3240 ppm) at ratio of 1 1 and 2 h of reaction time at 60 °C. The IL was recycled 7 times without a significant decrease in desulfurization. 

---