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Studies on TMPD:TCNB; a Donor-Acceptor with Room Temperature Paramagnetism and (n-π) Interaction



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


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) ', b} = 7.6772(11) ', c} = 8.0764(15) ', 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.


Charge transfer complex, Donor-Acceptor, magnetism


Ghalsasi, P. , Cage, B. and Yarger, J. (2004), Studies on TMPD:TCNB; a Donor-Acceptor with Room Temperature Paramagnetism and (n-π) Interaction, Molecules (Accessed July 24, 2024)


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Created November 30, 2004, Updated October 12, 2021