Studies on TMPD:TCNB; a donor-acceptor with room temperature paramagnetism and n-π interaction

Prasanna S. Ghalsasi, Brant Cage, J. L. Yarger

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A donor-acceptor compound based on N,N,N′N′-tetramethyl-p- phenylenediamine and 1,2,4,5-tetracyanobenzene (TMPD:TCNB) has been synthesized. The crystal structure of the black 1:1 complex formed between TMPD and TCNB has been determined by single crystal X-ray diffraction at room temperature. The compound crystallizes in the triclinic space group P-1 with cell dimensions: a = 7.4986(15) Å, b = 7.6772(11) Å, c = 8.0764(15) Å, α = 78.822(12)°, β = 83.3779(19)°, γ = 86.289(17)°. TMPD and TCNB molecules are stacked alternately in infinite columns along the a-axis. The structure does not seem to show the usual π-π interaction between the two aromatic rings, but indicates an n-π interaction localized between the nitrogen atoms of the donor and the cyano groups of the acceptor.

Original languageEnglish (US)
Pages (from-to)808-814
Number of pages7
Issue number9
StatePublished - Sep 2004
Externally publishedYes


  • Charge transfer complex
  • Donor-Acceptor
  • Magnetism

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry


Dive into the research topics of 'Studies on TMPD:TCNB; a donor-acceptor with room temperature paramagnetism and n-π interaction'. Together they form a unique fingerprint.

Cite this