Abstract
The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 4-methylpiperidine (4MP) with the σ-electron acceptor iodine and π-acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5- cyclohexadienone (TBCHD) have been investigated spectrophotometrically in chloroform at 25 °C. These were characterized through electronic and infrared spectra as well as elemental and thermal analysis. The obtained results showed that the formed solid CT-complexes have the formulas [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)] and with TCNQ the adduct [TCMPQDM] is obtained through N-substitution reaction in full agreement with the known reaction stoichiometries in solution as well as the elemental measurements. The formation constant KCT, molar extinction coefficient εCT, free energy change ΔG0, CT energy ECT and the ionization potential Ip have been calculated for the CT-complexes [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)].
| Original language | English |
|---|---|
| Pages (from-to) | 498-505 |
| Number of pages | 8 |
| Journal | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
| Volume | 135 |
| DOIs | |
| Publication status | Published - 25 Jan 2015 |
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Keywords
- 4-Methylpiperidine
- DDQ
- Iodine
- Spectra
- TBCHD
ASJC Scopus subject areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics
- Instrumentation
- Spectroscopy
Cite this
Charge-transfer complexes of 4-methylpiperidine with σ- And π-acceptors. / Alqaradawi, Siham Y.; Mostafa, Adel; Bazzi, Hassan S.
In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, Vol. 135, 25.01.2015, p. 498-505.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Charge-transfer complexes of 4-methylpiperidine with σ- And π-acceptors
AU - Alqaradawi, Siham Y.
AU - Mostafa, Adel
AU - Bazzi, Hassan S.
PY - 2015/1/25
Y1 - 2015/1/25
N2 - The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 4-methylpiperidine (4MP) with the σ-electron acceptor iodine and π-acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5- cyclohexadienone (TBCHD) have been investigated spectrophotometrically in chloroform at 25 °C. These were characterized through electronic and infrared spectra as well as elemental and thermal analysis. The obtained results showed that the formed solid CT-complexes have the formulas [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)] and with TCNQ the adduct [TCMPQDM] is obtained through N-substitution reaction in full agreement with the known reaction stoichiometries in solution as well as the elemental measurements. The formation constant KCT, molar extinction coefficient εCT, free energy change ΔG0, CT energy ECT and the ionization potential Ip have been calculated for the CT-complexes [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)].
AB - The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 4-methylpiperidine (4MP) with the σ-electron acceptor iodine and π-acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5- cyclohexadienone (TBCHD) have been investigated spectrophotometrically in chloroform at 25 °C. These were characterized through electronic and infrared spectra as well as elemental and thermal analysis. The obtained results showed that the formed solid CT-complexes have the formulas [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)] and with TCNQ the adduct [TCMPQDM] is obtained through N-substitution reaction in full agreement with the known reaction stoichiometries in solution as well as the elemental measurements. The formation constant KCT, molar extinction coefficient εCT, free energy change ΔG0, CT energy ECT and the ionization potential Ip have been calculated for the CT-complexes [(4MP) I] +I- 3, [(4MP)(DDQ)2] and [(4MP)(TBCHD)].
KW - 4-Methylpiperidine
KW - DDQ
KW - Iodine
KW - Spectra
KW - TBCHD
UR - http://www.scopus.com/inward/record.url?scp=84907343647&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907343647&partnerID=8YFLogxK
U2 - 10.1016/j.saa.2014.07.050
DO - 10.1016/j.saa.2014.07.050
M3 - Article
VL - 135
SP - 498
EP - 505
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
SN - 1386-1425
ER -