Trans-ReOCl3(PPh3)(2) reacts with 2,3- and 2,6-dihydroxybenzoic acid (H(2)dhb) in an equimolar ratio in benzene to give the products [ReOCl(2,3-dhb)(PPh3)(2)] (1) and [ReOCl(2,6-dhb)(PPh3)(2)] (2), respectively. Elemental analysis, infrared, NMR and X-ray crystallographic results indicate that the ligand 2,3-dhb coordinates via the catecholato mode to the metal centre in 1, but 2,6-dhb functions as a salicylato-type chelate in 2. (C) 1999 Elsevier Science S.A. All rights reserved.
Coordination mode of dihydroxybenzoic acids in oxorhenium(V) complexes
BANDOLI, GIULIANO;DOLMELLA, ALESSANDRO;
1999
Abstract
Trans-ReOCl3(PPh3)(2) reacts with 2,3- and 2,6-dihydroxybenzoic acid (H(2)dhb) in an equimolar ratio in benzene to give the products [ReOCl(2,3-dhb)(PPh3)(2)] (1) and [ReOCl(2,6-dhb)(PPh3)(2)] (2), respectively. Elemental analysis, infrared, NMR and X-ray crystallographic results indicate that the ligand 2,3-dhb coordinates via the catecholato mode to the metal centre in 1, but 2,6-dhb functions as a salicylato-type chelate in 2. (C) 1999 Elsevier Science S.A. All rights reserved.
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