The (NHEt3) [Rh(C6Cl2O4) (CO)(2)] complex: an example of the adverse counterion influence in the formation of metallic stacks

The synthesis and complete characterisation of the chloroanilato anionic rh odium complexes (NHEt3) [Rh(C6Cl2O4) (COD)] (1) and (NHEt3) [Rh(C6Cl2O4)(CO )(2)] (2) an reported. Ln these complexes the chloroanilate dianion chelate s the metal through the 1,2 oxygen atoms. The crystal structure of complex (NHEt3) [Rh(C6Cl2O4) (CO)(2)] (2) reveals the adverse influence of the coun terion in the formation of metal-columnar stacking.;Although the molecules exhibit intermetallic interactions between the planar mononuclear units, th e presence of secondary hydrogen bonding between NHEt3+ and the anionic rho dium complexes prevents the formation of an infinite stacked structure. (C) 1999 Published by Elsevier Science S.A. All rights reserved.