✦ LIBER ✦

The Effective Electron-Transfer Distance in Dinuclear Ruthenium Complexes Containing the Unsymmetrical Bridging Ligand 3,5-Bis(2-pyridyl)-1,2,4-triazolate

✍ Scribed by Deanna M. D’Alessandro; Peter H. Dinolfo; Joseph T. Hupp; Peter C. Junk; F. Richard Keene

Publisher: John Wiley and Sons
Year: 2006
Tongue: English
Weight: 242 KB
Volume: 2006
Category: Article
ISSN: 1434-1948
DOI: 10.1002/ejic.200500916

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Electroabsorption (Stark effect) measurements on the intervalence charge‐transfer (IVCT) transitions in the diastereoisomers of [{Ru(bpy)~2~}~2~(μ‐bpt^–^)]^4+^ [bpy = 2,2′‐bipyridine, bpt^–^ = 3,5‐bis(2‐pyridyl)‐1,2,4‐triazolate] in n‐butyronitrile glass at 77 K reveal effective charge‐transfer distances of 5.92 ± 0.03 Å for the ΔΛ/ΛΔ form and 5.44 ± 0.04 Å for the ΔΔ/ΛΛ form. These values correspond to approximately 95 and 88 %, respectively, of the geometrical metal–metal distance of 6.185(10) Å, obtained from the X‐ray crystal structure of the cation in the related complex (ΔΛ)‐{Ru(Me~2~bpy)~2~}~2~(μ‐bpt^–^)~3~. The results are consistent with a localized Class II classification for the mixed‐valence systems [{Ru(pp)~2~}~2~(μ‐bpt^–^)]^4+^, where pp = bpy, Me~2~bpy = 4,4′‐dimethyl‐2,2′‐bipyridine. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

📜 SIMILAR VOLUMES

Exchange Interactions and Covalency in D

Exchange Interactions and Covalency in Dinuclear Complexes of Iron(III) and Gallium(III) Containing the Redox-Noninnocent Ligand 1,2-Bis(3,5-di-tert-butyl-2-hydroxyphenyl)oxamide

✍ Udo Beckmann; Eckhard Bill; Thomas Weyhermüller; Karl Wieghardt 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 220 KB

Probing the Dinucleating Behaviour of a

Probing the Dinucleating Behaviour of a Bis-Bidentate Ligand: Synthesis and Characterisation of Some Di- and Mononuclear Cobalt(II), Nickel(II), Copper(II) and Zinc(II) Complexes of 3,5-Di(2-pyridyl)-4-(1H-pyrrol-1-yl)-4H-1,2,4-triazole

✍ Marco H. Klingele; Peter D. W. Boyd; Boujemaa Moubaraki; Keith S. Murray; Sally 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 292 KB

## Abstract As a probe of the dinucleating ability of the known but little studied bis‐bidentate ligand 3,5‐di(2‐pyridyl)‐4‐(1__H__‐pyrrol‐1‐yl)‐4__H__‐1,2,4‐triazole (pldpt) its reactivity towards MX~2~·6H~2~O (M = Co^II^, Ni^II^ and Zn^II^; X = ClO~4~^–^ and BF~4~^–^) as well as Cu(ClO~4~)~2~·6H~