Crystal structure of bis(ethylenedithio)tetrathiafulvalenium μ₂-acetato-bis[tribromidorhenate(III)] 1,1,2-trichloroethane hemisolvate

Abstract

The crystal structure of a binuclear mono­carboxyl­ato dirhenium(III) complex with a fulvalene derivative is reported. This compound represents a radical cation salt containing a cluster unit with rhenium–rhenium quadruple bond.

Resonant Raman scattering and ESR study of ET salts with rhenium‐containing anions

“…For ET 2 [Re 2 Cl 8 ] sample, one can observe some incompatibility between simulated and experimental spectrum near magnetic field range 12,140–12,160 Gs that corresponds to the g zz value. This suggests the presence of two types of ET +• radical with various g zz value for ET 2 [Re 2 Cl 8 ] salt in contrast to ET[Re 2 Br 6 CH 3 COO]⋅0.5(C 2 H 3 Cl 3 ) and it is consistent with the structural data …”

“…In the structure of both salts presented in Figure , the ET molecules are arranged into dimers separated by the rhenium‐containing anions and (in the case of ET[Re 2 Br 6 CH 3 COO]⋅0.5(C 2 H 3 Cl 3 )) the solvent molecules . The distances within the dimers differs in both salts as well as the mutual position of the ET molecules in the dimers.…”

“…In the ET 2 [Re 2 Cl 8 ], the ET molecules are packed in an almost “bond over the bond” manner whereas in ET[Re 2 Br 6 CH 3 COO]⋅0.5(C 2 H 3 Cl 3 ) it is more “bond over the ring” position. Additionally, for the latter salt that have longer intradimer distances there are short sulphur–sulphur contacts (3.412 Å) between the neighbouring dimers . On the other hand, in the structure of ET 2 [Re 2 Cl 8 ], there are two types of crystallographically independent ET molecules in contrast to the second salt.…”

“…The crystals of ET 2 [Re 2 Cl 8 ] and ET[Re 2 Br 6 CH 3 COO]⋅0.5(C 2 H 3 Cl 3 ) have been synthesized by electrocrystallization as described in Golichenko et al. The synthesis of the ET[Re 2 Br 6 CH 3 COO]⋅0.5(C 2 H 3 Cl 3 ) salt and ET 2 [Re 2 Cl 8 ] was performed by galvanostatic anodic oxidation of ET (0.002 mol/l) in a two electrode U‐shaped glass cell with platinum electrodes separated by a glass frit.…”

“…On the other hand, among this variety of anions used for the synthesis of CT salts, there are only a few containing metal–metal bond . It starts to change recently because some new CT salts with the metal–metal bonded anions have been synthesized . There is still little known about the properties of such salts, so we decide to take a look on their spectral properties.…”