Deuterium isotope effects on P-31 NMR parameters: Hydrogen bonding in a solid urea phosphoric acid adduct

被引:9
|
作者
Lagier, CM [1 ]
Apperley, DC [1 ]
Scheler, U [1 ]
Olivieri, AC [1 ]
Harris, RK [1 ]
机构
[1] UNIV DURHAM, DEPT CHEM, DURHAM DH1 3LE, ENGLAND
关键词
D O I
10.1039/ft9969205047
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
Long-range deuterium isotope effects on the P-31 NMR shielding tensor were studied for the perdeuteriated urea-phosphoric acid adduct (ND2)(2)CO . D3PO4. This complex contains a short hydrogen bond linking its molecular components, for which a single-minimum potential energy well has been suggested. The results indicate that (sigma(11) - sigma(iso)) decreases and (sigma(33) - sigma(iso)) increases for the deuteriated complex with respect to the undeuteriated adduct. This fact is consistent with the hypothesis of a single-minimum potential energy surface for the short hydrogen bond.
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页码:5047 / 5050
页数:4
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