Pattanayak, Sujay ; Pramanik, Kausikisankar ; Bag, Nilkamal ; Ghosh, Prasanta ; Chakravorty, Animesh (1997) Valence specific chelation of ruthenium to Schiff mono-bases of 2,6-diformyl-4methylphenol : synthesis and structure of trivalent salicylaldiminato species of coordination type RuN2O2PCl Polyhedron, 16 (17). pp. 2951-2956. ISSN 0277-5387
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S02775...
Related URL: http://dx.doi.org/10.1016/S0277-5387(97)00057-0
Abstract
The reaction of Schiff mono-bases, HRL (R = Me, Et), of 2,6-diformyl-4-methylphenol with K2 RuCl,(H2O) has afforded RuIII(RL)2(PPh3)Cl. The X-ray structure of the R = Et complex has revealed metal chelation at the salicylaldimine segment of RL-, the two phenolic oxygen and azomethine nitrogen atoms lying in mutually trans and cis positions, respectively. The trivalent state of the metal is stabilized in Ru(RL)2(P-Ph3)Cl, the ruthenium (III)/ruthenium(II) E1/2 being ~0.40 V vs SCE. These distorted low-spin (t25) complexes display rhombic EPR spectra and are characterized by a pair of ligand field transitions (in the near-IR region) within the split t2 shell. The complexes provide a striking contrast with the ruthenium(II) organometallics arising from the reaction of HRL with RuII(PPh3)3Cl2.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Trivalent Ruthenium Salicylaldimines; Valence Specific Chelation |
| ID Code: | 6860 |
| Deposited On: | 26 Oct 2010 05:20 |
| Last Modified: | 31 Jan 2011 06:56 |
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