Preparation, properties, and X-ray crystal structure of a 1:1 complex of tetrathiafulvalene and p-dinitrobenzene

Abstract

A crystalline complex of tetrathiafulvalene and p-dinitrobenzene has been prepared and characterised by esr and ir spectroscopy, bulk magnetic susceptibility, dc conductivity, and an X-ray diffraction analysis. It is a neutral 1: 1 complex which is an insulator at room temperature, o,, = 2.5 x ohm-' cm-I. The complex crystallizes in the triclinic system, space group P 1 with cell constants a Ona prkpark un complexe cristallin du tttrathiafulvalbne et dup-dinitrobenzene et onl'a caracttrist par la rpe, la spectroscopie ir, la susceptibilitk magnktique de groupe, la conductivitk cd, et par l'analyse de diffraction de rayons X. C'est un complexe neutre 1: 1 qui est un isolant 2 la temptrature ambiante, o , , = 2,s x ohm-' cm-I. Le complexe cristallise dans le systkme triclinique et appartienta~grouped'es~ace P i a v e c a = 6,915

X-Ray crystal structure of tetra-acetatobis(tetrathiafulvalene)dirhodium(II) and the properties of its iodine-doped complex

“…a = 12.496 (3), b = 14.41 3 (3), c = 8.296(2) A, p = 104.27(2)", and Z = 2. The structure was solved by a standard heavy-atom method and refined, o n the basis of 1 734 [IF,/ > 3 s ( F ) ] observed data, to an R value of 0.082.…”

4,4′,5,5′-Tetramethyltetrathiafulvalene–1,4-dinitrobenzene (1/1)

“…1). In this respect, (I) differs from the 1:1 complex (II) between unsubstituted TTF and DNB (Bryce et al, 1982), where mixed stacks also exist, but the overlap between adjacent molecules is only partial. Alternatively, the motif of (I) can be described as layers, parallel to the (010) plane.…”

Charge transfer complexes of Schiff bases derived from 2-aminobenzothiazole with some acidic and nonacidic acceptors

“…The choice of Schiff bases as donors was mainly because they contain the azomethine group, the same group that occurs in rhodopsin, the visual pigment extracted from rod cells (13), while pyridoxal forms Schiff bases with various amino compounds found in the cell, including natural substrates of many B6 enzymes (14). The CTC's of aromatic nitro compounds have been studied with various aromatic donor compounds (15)(16)(17)(18), while few studies have been concerned with CTC's of benzylidene derivatives (19,20). On the other hand, the behaviour of Schiff bases as donors towards acceptors other than the aromatic nitro compounds was the subject of several investigations (21)(22)(23).…”