Physical image vs. structure relation, 5.: Multinuclear NMR structural study on some hydrazones of O,O-dialkyl 1-oxoalkanephosphonates

被引：0

作者：

Nazarski, RB ^{[1
]}

Gralak, DK ^{[1
]}

Kudzin, ZH ^{[1
]}

机构：

[1] Univ Lodz, Dept Organ Chem, PL-90136 Lodz 1, Poland

来源：

BULLETIN OF THE POLISH ACADEMY OF SCIENCES-CHEMISTRY | 2000年 / 48卷 / 01期

关键词：

NMR; J(HP) and J(CP); C-13 satellite spectra; C-12/C-13 isotope effects; stereochemistry; hydrazones; 1-oxoalkanephosphonates; E/Z isomerisations; intramolecular H-bonding; scalar couplings across H-bond;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An unambiguous method for determination of the configuration of any single O,O-dialkyl 1-oxoalkanephosphonate hydrazones based on H-1, C-13, P-31 NMR data has been elaborated; the use of (1)J(CP) (P-C=N) couplings is the most fruitful. The C-12/C-13 isotope effects on the 31P chemical shifts of selected compounds have been measured. For primary hydrazones the E/Z isomerisation with stabilisation of their Z forms through an intramolecular R-bonding has been proven. In addition, for the latter stereoisomers small scalar couplings between II-blinded groups N-H...O=P have been found, J(HP) 2.4-3.4 Hz. The possibility of the across IT-bridge transfer of spin-spin interactions in these forms is also discussed.

引用

页码：27 / 33

页数：7

共 24 条

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