Fast H-1 NMR relaxation in some ruthenium hydrides

Authors
Castellanos, A Ayllon, JA Sabo-Etienne, S Donnadieu, B Chaudret, B Yao, WB Kavallieratos, K Crabtree, RH
Citation
A. Castellanos et al., Fast H-1 NMR relaxation in some ruthenium hydrides, CR AC S IIC, 2(5-6), 1999, pp. 359-368
Citations number
32
Categorie Soggetti
Chemistry
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE
ISSN journal
13871609 → ACNP
Volume
2
Issue
5-6
Year of publication
1999
Pages
359 - 368
Database
ISI
SICI code
1387-1609(199905/06)2:5-6<359:FHNRIS>2.0.ZU;2-O
Abstract
We report here the synthesis of the new hydride complexes (C5H4CH(CH2CH2)(2 )NMe)RuH(PPh3)(2) (1) and [(C5H4CH(CH2CH2)(2)NHMe)-RuH(PPh3)(2)] (BF4) (2), the X-ray crystal structures of 1 and 2, and an unprecedented observation of extremely short relaxation times in a monohydride complex as well as in the reaction of CpRuH(PPh3)(2) with a variety of acidic proton donors. The relaxation is much faster than expected for a dipole-dipole process involvi ng the two dihydrogen-bonded protons, but no origin for the effect could be suggested. (C) Academie des sciences/Elsevier, Paris.