Research Article: Redetermination of tetra­methyl tetra­thia­fulvalene-2,3,6,7-tetra­carboxyl­ate

Date Published: August 01, 2012

Publisher: International Union of Crystallography

Author(s): Felix Katzsch, Edwin Weber.


An improved crystal structure of the title compound, C14H12O8S4, is reported. The structure, previously solved using the heavy-atom method (R = 7.1%), has now been solved using direct methods. Due to the improved quality of the data set an R value of 2.06% could be achieved. In the crystal, C—H⋯S and C—H⋯O contacts link the mol­ecules.

Partial Text

For the first structure determination of the title compound, see: Belsky & Voet (1976 ▶). For a previously reported experimental procedure and physical data, see: Yoneda et al. (1978 ▶). For C—H⋯O hydrogen bonds, see: Desiraju & Steiner (1999 ▶); Katzsch et al. (2011 ▶); Fischer et al. (2011 ▶). For C—H⋯S hydrogen bonds, see: Mata et al. (2010 ▶); Novoa et al. (1995 ▶); Lu et al. (2005 ▶); Saad et al. (2010 ▶). For a description of ring motifs, see: Bernstein et al. (1995 ▶); Petersen et al. (2007 ▶). For several steps of the synthetic procedure, see: Degani et al. (1986 ▶); O’Connor & Jones (1970 ▶); Nguyen et al. (2010 ▶). For general background to the electroconductive behaviour of tetra­thia­fulvalene derivatives, see: Takase et al. (2011 ▶).




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