aproticadj.
/eɪˈprəʊtɪk/ Chemistry.
Of a liquid, esp. a solvent: having little or no tendency to accept or donate protons; neither protogenic nor protophilic.
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aprotic1931
1931 Chem. Rev. 8 194 A solvent of opposite or aprotic character is represented by benzene, which neither gives up nor takes up protons to any considerable extent.
1940 S. Glasstone Text-bk. Physical Chem. xii. 958 For convenience solvents are divided roughly into three categories according as the molecules are (a) proton acceptors, i.e., basic, or protophilic, (b) proton donors, i.e., acidic, or protogenic, or (c) neither donors nor acceptors, i.e., aprotic.
1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. xv. 556 In ‘aprotic’ solvents the acid-base concept may be extended to regard those substances which generate the solvent cation (e.g. NO+ in NOCl..) as ‘Lewis’ acids, and those which generate the solvent anion (e.g. Cl− in NOCl..) as ‘Lewis’ bases.
1973 E. J. King in A. K. Covington & T. Dickinson Phys. Chem. Org. Solvent Syst. iii. 333 Each broad class in turn is sub-divided into hydrogen-bonded and non-hydrogen-bonded solvents. The term protic is frequently used for the first sub-division, aprotic for the second.
1983 Chem. Week 25 May 37/1 The aprotic solvents are expensive and the purification equipment that is necessary to recover them entails a considerable capital investment.
This entry has not yet been fully updated (first published 1989; most recently modified version published online June 2018).
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adj.1931