TRITIUM NUCLEAR MAGNETIC-RESONANCE SPECTROSCOPY .11. FURTHER CONSIDERATION OF REFERENCING, ISOTOPE EFFECTS AND COUPLING-CONSTANTS - PREPARATION OF [TETRAMETHYLSILANE-H-3

被引：43

作者：

BLOXSIDGE, JP ^{[1
]}

JONES, JR ^{[1
]}

MANE, RB ^{[1
]}

SALJOUGHIAN, M ^{[1
]}

ELVIDGE, JA ^{[1
]}

机构：

[1] UNIV SURREY,DEPT CHEM,GUILDFORD GU2 5XH,SURREY,ENGLAND

来源：

ORGANIC MAGNETIC RESONANCE | 1979年 / 12卷 / 10期

关键词：

D O I：

10.1002/mrc.1270121006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Small discrepancies between 3H and 1H chemical shifts in organic compounds led to the finding that the ratio of Larmor frequencies ωT/ωH depends on the carbon‐hydrogen bond hybridisation. The ‘best’ ratio for ghost referencing of 3H NMR spectra was then determined from measurements on purified partially tritiated TMS as 1.066639738±2 × 10−9. Some 3H isotope effects on chemical shifts are listed and the 3H isotope effect on the methylene geminal coupling constant in benzyl methyl sulphoxide is measured. Use of 2H in the measurement of 2J(HH) coupling constants has inherent disadvantages, overcome by use of 3H substitution. Copyright © 1979 Heyden & Son Ltd.

引用

页码：574 / 578

页数：5

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