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Chiral Radical-Cation Salts of BEDT-TTF Containing a Single Enantiomer of Tris(oxalato)aluminate(III) and -chromate(III)

Lookup NU author(s): Dr Ross Harrington, Professor William Clegg

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Abstract

Radical-cation salts of BEDT-TTF with chiral anions provide the opportunity to combine chirality with conductivity in the same molecular material. We report here two salts, (BEDT-TTF)(3)NaAl(C2O4)(3)nitromethane and (BEDT-TTF)(3)(NH4)(0.83)Cr-1.17(C2O4)(3)nitromethane. The former crystallises in space group P2(1) and the latter in P2(1)2(1)2(1). The use of nitromethane alone as the electrolyte for electrocrystallisation produces no crystals, but the addition of chiral (R)-(-)-carvone yields crystals of these two new chiral radical-cation salts of BEDT-TTF through chiral induction from racemic tris(oxalato)aluminate(III) and tris(oxalato)chromate starting materials. The honeycomb anion layers in these salts contain a single enantiomer of tris(oxalato)metallate and creates hexagonal cavities that are smaller than those found in the superconducting salts in this tris(oxalate)metallate family, which gives preference for smaller solvents to be included, such as nitromethane. The chromium salt has a non-stoichiometric composition of the anion layer, which provides an electron doping effect to the donor layer.

Publication metadata

Author(s): Martin L, Akutsu H, Horton PN, Hursthouse MB, Harrington RW, Clegg W

Publication type: Article

Publication status: Published

Journal: European Journal of Inorganic Chemistry

Year: 2015

Volume: 2015

Issue: 11

Pages: 1865-1870

Print publication date: 01/04/2015

Online publication date: 06/03/2015

ISSN (print): 1434-1948

ISSN (electronic): 1099-0682

Publisher: Wiley - V C H Verlag GmbH & Co. KGaA

URL: http://dx.doi.org/10.1002/ejic.201500092

DOI: 10.1002/ejic.201500092

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