| 释义 |
deprotonate, v. Chem.
Brit. |ˌdiːˈprəʊtəneɪt|, U.S. |diˈproʊdəˌneɪt|
[‹ de- prefix + protonate v. Compare slightly earlier deprotonation n.]
1. trans. To remove a proton (an H+ ion) from (a molecule or atom).
1952Jrnl. Amer. Chem. Soc. 74 1816 The initially formed carbonium ion..is deprotonated by a second molecule of IV. 1972Proc. National Acad. Sci. 69 115 An adjacent mechanism of the same group acts first as a general base to deprotonate the 2′-OH. 1991D. T. Sawyer Oxygen Chem. ii. 20 O2- can deprotonate acids much weaker than water. 1999Nature 18 Nov. 249/2 When Asp 61 is deprotonated, there is a dramatic 140°-rotation of the carboxy-terminal helix.
2. intr. Of a molecule or atom: to lose a proton.
1964Jrnl. Amer. Chem. Soc. 86 4772 A protonated intermediate, TBH+, which then deprotonates to form the product, BH. 1988Proc. National Acad. Sci. U.S.A. 85 21 The Schiff base nitrogen deprotonates producing M412. 1993Dyes & Pigments 21 35 The NH group of the hydrazone isomer is fairly acidic and is supposed to deprotonate first.
Derivatives. deprotonated adj.
1956Jrnl. Org. Chem. 21 1399/2 This suggests that..sodium acetate is not needed for the formation of the *deprotonated species. 1994New Scientist 15 Oct. 89/1 Tannins are polyphenolic compounds and spend most of their time with the alcohol group deprotonated. |