Structural Trends in Potential Organic Conductors Based on (Donor–CH2)2 Tetracyanoquinodimethane Molecules

J. Y. Becker, J. Bernstein, S. Bittner, J. A.R.P. Sarma, S. S. Shaik

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The stoichiometry of electron donor-acceptor (EDA) complexes with potential electrical conductivity may be predetermined by preparing compounds in which D(s) and A(s) are chemically linked. The structural properties of three compounds comprised of two identical Ds bonded to one A (TCNQ; i.e., D…A…D) are reported here. The three compounds are isostructural; monoclinic, space group P21/a, Z = 2. D = C6H5: a = 13.999 (6), b = 10.760 (2), c = 6.970 (2) Å, β = 102.51 (3)°. D = p–C6H4OCH3: a = 16.887 (6), b = 10.235 (6), c = 7.172 (4) Å, β = 107.80 (4)°. D = β-naphthyl: a = 16.93 (4), b = 11.676 (8), c = 7.093 (9) Å, β = 114.3 (1)°. The structure of the last compound has also been determined at 93 K: a = 16.816 (5), b = 11.438 (4),c = 7.086 (1) Å,β = 115.21 (3)°. The outstanding common structural feature is the tendency to form infinite segregated stacks of A along the c axis, thus achieving a condition necessary for electrical conductivity. The charge-transfer interaction is achieved by the formation of previously not observed D…A…D triplets along both the A stacks and linking screw-related stacks. Details of the interactions leading to this unusual architecture are investigated with the aid of lattice energy calculations.

Original languageEnglish
Pages (from-to)412-420
Number of pages9
JournalChemistry of Materials
Volume1
Issue number4
DOIs
StatePublished - 1 Jul 1989

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Materials Chemistry

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