Abstract
This chapter presents the design and analysis of the microscopic features of binary solvent systems formed by ionic liquids, particularly room temperature ionic liquids with molecular solvents. Protic ionic liquids, ethylammonium nitrate and 1-n-butyl-3-methylmidazolium (bmim)-based ILs, were selected considering the differences in their hydrogen-bond donor acidity. The molecular solvents chosen were aprotic polar (acetonitrile, dimethylsulphoxide and N,N-dimethylformide) and protic (different alcohols). The empirical solvatochromic parameters E NT , π*, α and β were employed in order to analyse the behaviour of each binary solvent system. The study focuses on the identification of solvent mixtures of relevant solvating properties to propose them as ‘new solvents’. Kinetic study of aromatic nucleophilic substitution reactions carried out in this type of solvent systems is also presented. On the other hand, this is considered as a new approach on protic ionic liquids. Ethylammonium nitrate can act as both Brönsted acid and/or nucleophile. Two reactions (aromatic nucleophilic substitution and nucleophilic addition to aromatic aldehydes) were considered as model reactions.
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Acknowledgement
This work received financial supports from Universidad Nacional del Litoral (U.N.L), C.A.I + D 2009 (projects: 56-270 and 56-272), CONICET (project PIP 2010 N°140) and National Agency of Research and Development (proyects PICTO N° 36189 and PICT 2008 N° 1214).
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Mancini, P.M.E., Bravo, M.V., Fortunato, G.G., Adam, C.G. (2012). Ionic Liquids as Binary Mixtures with Selected Molecular Solvents, Reactivity Characterisation and Molecular-Microscopic Properties. In: Mohammad, A., Inamuddin, D. (eds) Green Solvents II. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2891-2_13
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