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Novel charge transfer salts of BEDT-TTF with metal oxalate counterions

Novel charge transfer salts of BEDT-TTF with metal oxalate counterions
Novel charge transfer salts of BEDT-TTF with metal oxalate counterions
The preparation, crystal structures and properties of three new BEDT-TTF, bis(ethylenedithio)tetrathiafulvalene, (ET for short), charge transfer salts beta " (ET)(4).[(H3O)Cr(C2O4)(3)].C6H5NO2 I, beta " (ET)(4).[(H3O)Fe(C2O4)(3)].C6H5NO2 II and (ET)(4). Fe-2(C2O4)(5)] III are reported. The structures of I and II consist of alternating layers of ET and an approximately hexagonal network formed by H3O+ and the metal with the solvent molecule, C6H5NO2, occupying hexagonal cavities in the anion layer. Both C6H5NO2 salts are superconducting, the iron salt having a T-c of 6.2 K and the chromium salt having a T-c of 5.8 K. The structure of(ET)(4)Fe-2(C2O4)(5)] consists of an iron oxalate bridged dimer, (Fe-Fe distance 5.472 Angstrom), interspersed with ET in a "checker board" arrangement. It is monoclinic and crystallises in the P2(1)/n space group. At 150 K a = 16.8068 (3) Angstrom, b = 10.9556 (2) Angstrom, c = 19.4109 (3) Angstrom, beta = 102.1593 (9) degrees and V = 3493.92 (10) Angstrom (3). Squid measurements show short range antiferromagnetic ordering.
electrocrystallisation, magnetic measurements, transport measurements, organic superconductorsmolecular superconductor, physical-properties, crystal-structure, bis(ethylenedithio)tetrathiafulvalene, ions
985-986
Rashid, S.
def6a870-c532-4b51-a2f9-7a7019c72872
Turner, S. S.
5fac7326-12c8-49e0-b494-24834da76f5e
Day, P.
369f0667-c086-47c2-b22c-7b07afd64354
Light, M. E.
cf57314e-6856-491b-a8d2-2dffc452e161
Hursthouse, M. B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da
Guionneau, P.
3a822ea8-ff7f-4093-b356-abbe1881ac61
Rashid, S.
def6a870-c532-4b51-a2f9-7a7019c72872
Turner, S. S.
5fac7326-12c8-49e0-b494-24834da76f5e
Day, P.
369f0667-c086-47c2-b22c-7b07afd64354
Light, M. E.
cf57314e-6856-491b-a8d2-2dffc452e161
Hursthouse, M. B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da
Guionneau, P.
3a822ea8-ff7f-4093-b356-abbe1881ac61

Rashid, S., Turner, S. S., Day, P., Light, M. E., Hursthouse, M. B. and Guionneau, P. (2001) Novel charge transfer salts of BEDT-TTF with metal oxalate counterions. Synthetic Metals, 120 (1-3), 985-986. (doi:10.1016/S0379-6779(00)00856-0).

Record type: Article

Abstract

The preparation, crystal structures and properties of three new BEDT-TTF, bis(ethylenedithio)tetrathiafulvalene, (ET for short), charge transfer salts beta " (ET)(4).[(H3O)Cr(C2O4)(3)].C6H5NO2 I, beta " (ET)(4).[(H3O)Fe(C2O4)(3)].C6H5NO2 II and (ET)(4). Fe-2(C2O4)(5)] III are reported. The structures of I and II consist of alternating layers of ET and an approximately hexagonal network formed by H3O+ and the metal with the solvent molecule, C6H5NO2, occupying hexagonal cavities in the anion layer. Both C6H5NO2 salts are superconducting, the iron salt having a T-c of 6.2 K and the chromium salt having a T-c of 5.8 K. The structure of(ET)(4)Fe-2(C2O4)(5)] consists of an iron oxalate bridged dimer, (Fe-Fe distance 5.472 Angstrom), interspersed with ET in a "checker board" arrangement. It is monoclinic and crystallises in the P2(1)/n space group. At 150 K a = 16.8068 (3) Angstrom, b = 10.9556 (2) Angstrom, c = 19.4109 (3) Angstrom, beta = 102.1593 (9) degrees and V = 3493.92 (10) Angstrom (3). Squid measurements show short range antiferromagnetic ordering.

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Published date: 15 March 2001
Keywords: electrocrystallisation, magnetic measurements, transport measurements, organic superconductorsmolecular superconductor, physical-properties, crystal-structure, bis(ethylenedithio)tetrathiafulvalene, ions

Identifiers

Local EPrints ID: 19607
URI: http://eprints.soton.ac.uk/id/eprint/19607
PURE UUID: 58f9368f-c21a-46c7-897a-a82bfcbc649a
ORCID for M. E. Light: ORCID iD orcid.org/0000-0002-0585-0843

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Date deposited: 14 Feb 2006
Last modified: 03 Dec 2019 01:55

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Contributors

Author: S. Rashid
Author: S. S. Turner
Author: P. Day
Author: M. E. Light ORCID iD
Author: P. Guionneau

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