Low temperature 1H-, 19F-, and 31P-PGSE diffusion measurements.: Applications to cationic alcohol complexes

被引：41

作者：

Martínez-Viviente, E ^{[1
]}

Pregosin, PS ^{[1
]}

机构：

[1] ETH, Inorgan Chem Lab, CH-8093 Zurich, Switzerland

来源：

HELVETICA CHIMICA ACTA | 2003年 / 86卷 / 07期

关键词：

D O I：

10.1002/hlca.200390190

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The problems associated with low-temperature pulsed-gradient spin-echo (PGSE) NMR diffusion measurements are discussed. The influence of convection is overcome by employing a coaxial insert inside a normal 5 mm NMR tube. By means of this configuration, correct diffusion constants and temperature-independent hydrodynamic radii can be obtained. Low-temperature H-1-, F-19-, and P-31-PGSE measurements on unstable cationic alcohol complexes of palladium and tungsten (in MeOH and CH2Cl2) are reported. For [W(Cp)(adamant-1-ol)(CO)(3)](CF3SO3), a strong hydrogen bond between the alcohol OH group and the trifluoromethanesuffonate anion is demonstrated.

引用

页码：2364 / 2378

页数：15

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