Hydrogen bonds determine the signal arrangement in 13C NMR spectra of nicotinate

被引:3
|
作者
Gamov, G. A. [1 ]
Kuranova, N. N. [1 ]
Pogonin, A. E. [1 ]
Aleksandriiskii, V. V. [1 ,2 ]
Sharnin, V. A. [1 ]
机构
[1] Ivanovo State Univ Chem & Technol, Res Inst Thermodynam & Kinet Chem Proc, Ivanovo, Russia
[2] Russian Acad Sci, GA Krestov Inst Solut Chem, Moscow, Russia
关键词
Nicotinate; H-1-N-15; HMBC; H-1-C-13; HSQC; NMR; Hydrogen bond; AQUEOUS-SOLUTIONS; ACID; WATER; ETHANOL; SOLVATION; THERMODYNAMICS; TEMPERATURES; SOLVENTS;
D O I
10.1016/j.molstruc.2017.10.086
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Present work reports on studies of sodium nicotinate solutions in water and aqueous ethanol by means of H-1, C-13, N-15 NMR spectroscopy. The H(2) nucleus was observed to be the least shielded among pyridine ring protons whilst C(6) signal placed in the lowest field in relation to the other pyridine carbons. The hydrogen bonds formation between nicotinate and water molecules was shown to be probable reason of signal arrangement in C-13 NMR spectra of nicotinate. The heteronitrogen of nicotinate is less prone to the hydrogen bonding with water molecules than that of nicotinamide. The data on the change in the Gibbs energy of the nicotinate transfer and the results of the 13C NMR experiment are compared. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:565 / 569
页数:5
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