
By G. Charlot
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Extra resources for Chemical Reactions in Solvents and Melts
Sample text
V (2 - x) 7 9 j j (1957)]. 2a CRS 42 CHEMICAL REACTIONS IN SOLVENTS AND MELTS Solvent pH i 6 , Solvent 7 8 - ^^/ 9 n 10 jr 11 12 13 - j S ^ ^ ml HCI FIGS. 22-24. Werner, / . Am. Chem. Soc. 50, 2367 (1928)]. The pH of half-neutralization depends on the nature of the titrating acid; the pH for a given excess of titrant depends onlthe nature of titrated base. 3. Titration of weak bases by a weak acid (or inversely): see the case where the solvent does not interact. 4. Titration of a metallic salt MA by an acid HA'.
It is the same for aliphatic amines and substituted pyridines. It is impossible at present to relate the two phenomena. Effect of Association due to Hydrogen Bonding on Acid-Base Reactions We are, most of all, interested to know how hydrogen bonds can affect acid-base reactions and how to take them into account. We suppose that B and HA, when placed together, react according to an acid-base reaction. If the reacting species are associated by hydrogen bonding, their reactivity with respect to proton transfer is modified.
CALDIN, Quart. Revs. 7, 255 (1953). COULSON, Research (London) 10, 149 (1957). MCCLELLAN, (a) The Hydrogen Bond, Freeman, 1960 (2250 references). (b) Effect of condensation and of association by hydrogen bonding on acid-base reactions. 5. HARTLEY, / . Chem. Soc. 199 (1931). 6. WALDEN and E. BIRR, Z. Physik. Chem. A163, 263, 321 (1932). 7. V . K . DOWNES, / . Am. Chem. Soc. 55, 1840 (1933). 8. HETZER, / . Res. Nat. Bur. Stand. 46, 496 (1951). 9. SINGLETERRY, / . Phys. Chem. 56, 604 (1952). 10. , / .