NDLI: Tetraalkyl- and dialkyl-substituted BEDT-TTF derivatives and their cation-radical salts: synthesis, structure, and properties

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Tetraalkyl- and dialkyl-substituted BEDT-TTF derivatives and their cation-radical salts: synthesis, structure, and properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Hsien-Hau Geiser, Urs Williams, Jack M. Parakka, James P. Dudek, James D. DiNino, Ernest Kini, Aravinda M. Rivas, Felix Thomas, Seddon
Copyright Year	1999
Abstract	Tetraalkyl and dialkyl derivatives, where alkyl=ethyl and propyl, of the organic electron donor molecule bis(ethylenedithio)tetrathiafulvalene, BEDT-TTF or ET, have been synthesized via the Diels-Alder approach. Several cation-radical salts of these new donors have been prepared and structurally characterized, and found to contain donor molecules in nominally higher oxidation states (+1, +1.5 and +2) than the typically observed oxidation state of +0.5 in BEDT-TTF salts. The higher solubility of the tetraalkyl and dialkyl derivatives in solvents used for crystal growth is proposed as the principal reason for this finding. Surprisingly, X-ray crystallographic studies reveal that the alkyl groups in the neutral tetraethyl-ET as well as the oxidized tetraethyl-ET and diethyl-ET molecules in their cation-radical salts adopt axial configurations, rather than the expected equatorial configurations. Electrical properties of the cation-radical salts have been found to be either insulating or semiconducting, consistent with the higher oxidation states of the donor molecules in the salts and the crystal structures.
Starting Page	883
Ending Page	892
Page Count	10
File Format	PDF
ISSN	09599428
Volume Number	9
Issue Number	4
Journal	Journal of Materials Chemistry
DOI	10.1039/a809132c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Alkyl Electron donor Tetrathiafulvalene Diels\u2013Alder reaction X-ray crystallography
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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