TTF and TCNQ adducts of trimeric perfluoro-ortho-phenylene mercury

Combination of trimeric perfluoro-ortho-phenylene mercury (1) with TTF and TCNQ in a 1: 1 mixture of CH2Cl2 and CS, followed by slow evaporation of the solvent leads to the formation of orange needles of [(1)2.TTF] (2) and light yellow needles of [(1)(2)(.)TCNQ] (3), respectively. The structure of both complexes has been determined by X-ray analysis. The solid-state structure of 2 consists of centrosymmetrical supramolecules of [(1)2.TTF], in which the TTF molecule is sandwiched by two molecules of 1. This supramolecule is held by multiple (HgS)-S-... secondary interactions ranging from 3.467(5) Angstrom to 3.533(5) Angstrom. The solid state of 3 also consists of centrosymmetrical molecules of [(1)(2).TCNQ]. In this case, however, the TCNQ molecule is approximately perpendicular to the neighboring molecules of 1 with which it interacts by coordination of two nitrile groups. Examination of the atomic connectivity indicates the simultaneous coordination of the coordinated nitrile nitrogen atoms to the three mercury centers of 1. The resulting (HgN)-N-... distances range from 3.102(11) to 3.134(11)Angstrom. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved.