MIXED-VALENCE PROPERTIES OF AN NEW BINUCLEAR COMPLEX, [(EDTAH)RU-IIINCRU-II(CN)(5)](4-) AND KINETIC-STUDIES OF THE AQUA SUBSTITUTION-REACTION IN RU-III(EDTA)(H2O)(-) BY RU(CN)(6)(4-)

Authors
BAJAJ HC DAS A
Citation
Hc. Bajaj et A. Das, MIXED-VALENCE PROPERTIES OF AN NEW BINUCLEAR COMPLEX, [(EDTAH)RU-IIINCRU-II(CN)(5)](4-) AND KINETIC-STUDIES OF THE AQUA SUBSTITUTION-REACTION IN RU-III(EDTA)(H2O)(-) BY RU(CN)(6)(4-), Polyhedron, 16(21), 1997, pp. 3851-3855
Citations number
43
Categorie Soggetti
Chemistry Inorganic & Nuclear",Crystallography
Journal title
Polyhedron → ACNP
ISSN journal
02775387
Volume
16
Issue
21
Year of publication
1997
Pages
3851 - 3855
Database
ISI
SICI code
0277-5387(1997)16:21<3851:MPOANB>2.0.ZU;2-1
Abstract
A new asymmetric mixed valence complex, K-4[(edtaH)(RuNCRuII)-N-III(CN )(5)]. 2H(2)O, has been synthesized by aqua substitution reaction of [ Ru(edtaH)H2O] by K4Ru(CN)(6). Kinetic studies revealed an associative mechanism for the substitution reaction with a second order rate const ant 13.8 +/- 0.6 M(-1)s(-1) at 25 degrees C and pH = 5.0. This complex shows an MMCT maximum at 682 nm in water at 25 degrees C. Thermochrom ism of the MMCT band has been discussed. On the basis of alpha(2) (gro und state delocalisation) and H-AB (coupling integral) values this com plex can be categorized as a Robin-Day class-II type complex. (C) 1997 Elsevier Science Ltd.