Spectroscopic characterization and thermal structural analysis of the charge-transfer complexes formed in the reaction of 1-methylpiperazine with sigma- and pi-acceptors
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Charge-transfer complexes between 1-methylpiperazine (1MPIPZ) as a donor with the -acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), 2,3,5,6-tetrachloro-1,4-benzoquinone (chloranil = CHL) and -acceptor iodine (I2) have been studied spectrophotometrically in chloroform at room temperature by electronic and infrared spectra as well as elemental and thermal analysis. The obtained results indicate the formation of 1:3 M ratio for 1MPIPZ with TCNQ and TCNE, and 1:1 M ratio for 1MPIPZ with DDQ, CHL, and I 2. Based on the obtained data, the formed charge-transfer complexes were formulated as [(1MPIPZ)(TCNQ)3], [(1MPIPZ) (TCNE)3], [(1MPIPZ)(DDQ)], [(1MPIPZ)(CHL)] and [(1MPIPZ)2I]+ I3-. 2010 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR STRUCTURE
author list (cited authors)
Fakhro, A., Bazzi, H. S., Mostafa, A., & Shahada, L.
complete list of authors
Fakhro, Amina||Bazzi, Hassan S||Mostafa, Adel||Shahada, Lamis