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Carboxylate versus imidobenzoate bonding for anthranilic acid derivatives. Crystal structures of [W(eta-C5Me5)Cl-3(eta2-O2CC6H4NH2-2)] and [ReCl(OEt)(PPh3)2 (NC6H4CO2)]

Lookup NU author(s): Emeritus Professor Bill Clegg, Dr Mark Elsegood


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The paramagnetic complex [W(eta -C5Me5)Cl-3 (eta (2)-O2CC6H4NH-2)] (1) has been obtained by reaction of [W(eta -C5Me5)Cl-4] with anthranilic acid [1,2-(NH2)(CO2H)C6H4]; the X-ray crystal structure shows a pseudo-octahedral geometry with a mer arrangement of chlorines and a symmetrically chelating carboxylate group containing a pendant non-coordinated NH2 group. Contrastingly, [ReCl(OEt) (PPh3)(2)(NC6H4CO2)] (2), the product of the reaction between [ReOCl3(PPh3)(2)] and anthranilic acid contains pseudooctahedral rhenium with a chelating imidobenzoate ligand and trans-phosphines which are mutually cir to the bent imido function [Re-N(1)-C(1) = 143.5(3)degrees]. The carboxylate group of the chelating ligand is trans to a chloride with the remaining site (trans to the imido function) occupied by an ethoxide ligand. (C) 2001 Elsevier Science B.V. All rights reserved.

Publication metadata

Author(s): Gibson VC, Redshaw C, Clegg W, Elsegood MRJ

Publication type: Article

Publication status: Published

Journal: Inorganic Chemistry Communications

Year: 2001

Volume: 4

Issue: 2

Pages: 95-99

ISSN (print): 1387-7003

ISSN (electronic): 1879-0259

Publisher: Elsevier BV


DOI: 10.1016/S1387-7003(00)00216-1


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