THE SUBSTITUTION KINETICS OF THE AQUA LIGAND BY CYANIDE IONS IN [RU(TPPS)(CO)(H2O)](4-)

Authors
PURCELL W VANDERWESTHUIZEN HJ MEYER H
Citation
W. Purcell et al., THE SUBSTITUTION KINETICS OF THE AQUA LIGAND BY CYANIDE IONS IN [RU(TPPS)(CO)(H2O)](4-), Transition metal chemistry, 21(1), 1996, pp. 77-80
Citations number
18
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Transition metal chemistry
ISSN journal
03404285 → ACNP
Volume
21
Issue
1
Year of publication
1996
Pages
77 - 80
Database
ISI
SICI code
0340-4285(1996)21:1<77:TSKOTA>2.0.ZU;2-3
Abstract
The reaction between the title compound, phonatophenyl)porphynatoaquac arbonylruthenate(II), [Ru(TPPS)(CO)(H2O)](4-), and CN- revealed that o nly the aqua ligand is substituted even in the presence of a large exc ess of the nucleophile. The pK(a1) was spectrophotometrically determin ed as 13.4(5) (at 33.2 degrees C) and kinetically as 13.44(5) (at 33.6 degrees C). The rate of aqua substitution was determined as 89(4)M(-1 ) s(-1) at 35.1 degrees C and the activation enthalpy and entropy as 5 5.44(1) kJ mol(-1) and - 27.90(4)5 K-1 mol(-1), respectively.