Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ

Hassan S. Bazzi; Adel Mostafa; Siham Y. AlQaradawi; El Metwally Nour

doi:10.1016/j.molstruc.2006.12.005

Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ

Hassan S. Bazzi^*
, Adel Mostafa
, Siham Y. AlQaradawi
, El Metwally Nour

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

79 Citations (Scopus)

Abstract

Molecular charge-transfer complexes of the donor 2,6-diaminopyridine (2,6-DAPY) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tetrachloro-p-benzoquinone(chloranil) were studied spectrophotometrically in chloroform at room temperature. All formed complexes exhibit well resolved charge-transfer bands in the regions where neither donor nor acceptors have any absorption. The stoichiometries of the reactions were determined from photometric titration methods. The results obtained show the formed CT complexes have the structures [(2,6-DAPY)(TCNE)₃], [(2,6-DAPY)(DDQ)₂], and [(2,6-DAPY)(chloranil)]. These three complexes were isolated as solids and further characterized by elemental analysis and infrared measurements.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Molecular Structure
Volume	842
Issue number	1-3
DOIs	https://doi.org/10.1016/j.molstruc.2006.12.005
Publication status	Published - 15 Oct 2007
Externally published	Yes

Keywords

2,6-Diaminopyridine
CT-complexes
Chloranil
DDQ
Spectra
TCNE

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10.1016/j.molstruc.2006.12.005

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@article{8254577f88c44c3c83c40d8dfc16c925,

title = "Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ",

abstract = "Molecular charge-transfer complexes of the donor 2,6-diaminopyridine (2,6-DAPY) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tetrachloro-p-benzoquinone(chloranil) were studied spectrophotometrically in chloroform at room temperature. All formed complexes exhibit well resolved charge-transfer bands in the regions where neither donor nor acceptors have any absorption. The stoichiometries of the reactions were determined from photometric titration methods. The results obtained show the formed CT complexes have the structures [(2,6-DAPY)(TCNE)3], [(2,6-DAPY)(DDQ)2], and [(2,6-DAPY)(chloranil)]. These three complexes were isolated as solids and further characterized by elemental analysis and infrared measurements.",

keywords = "2,6-Diaminopyridine, CT-complexes, Chloranil, DDQ, Spectra, TCNE",

author = "Bazzi, \{Hassan S.\} and Adel Mostafa and AlQaradawi, \{Siham Y.\} and Nour, \{El Metwally\}",

year = "2007",

month = oct,

day = "15",

doi = "10.1016/j.molstruc.2006.12.005",

language = "English",

volume = "842",

pages = "1--5",

journal = "Journal of Molecular Structure",

issn = "0022-2860",

publisher = "Elsevier B.V.",

number = "1-3",

}

Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ. / Bazzi, Hassan S.; Mostafa, Adel; AlQaradawi, Siham Y. et al.
In: Journal of Molecular Structure, Vol. 842, No. 1-3, 15.10.2007, p. 1-5.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ

AU - Bazzi, Hassan S.

AU - Mostafa, Adel

AU - AlQaradawi, Siham Y.

AU - Nour, El Metwally

PY - 2007/10/15

Y1 - 2007/10/15

N2 - Molecular charge-transfer complexes of the donor 2,6-diaminopyridine (2,6-DAPY) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tetrachloro-p-benzoquinone(chloranil) were studied spectrophotometrically in chloroform at room temperature. All formed complexes exhibit well resolved charge-transfer bands in the regions where neither donor nor acceptors have any absorption. The stoichiometries of the reactions were determined from photometric titration methods. The results obtained show the formed CT complexes have the structures [(2,6-DAPY)(TCNE)3], [(2,6-DAPY)(DDQ)2], and [(2,6-DAPY)(chloranil)]. These three complexes were isolated as solids and further characterized by elemental analysis and infrared measurements.

AB - Molecular charge-transfer complexes of the donor 2,6-diaminopyridine (2,6-DAPY) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tetrachloro-p-benzoquinone(chloranil) were studied spectrophotometrically in chloroform at room temperature. All formed complexes exhibit well resolved charge-transfer bands in the regions where neither donor nor acceptors have any absorption. The stoichiometries of the reactions were determined from photometric titration methods. The results obtained show the formed CT complexes have the structures [(2,6-DAPY)(TCNE)3], [(2,6-DAPY)(DDQ)2], and [(2,6-DAPY)(chloranil)]. These three complexes were isolated as solids and further characterized by elemental analysis and infrared measurements.

KW - 2,6-Diaminopyridine

KW - CT-complexes

KW - Chloranil

KW - DDQ

KW - Spectra

KW - TCNE

UR - https://www.scopus.com/pages/publications/34548319746

U2 - 10.1016/j.molstruc.2006.12.005

DO - 10.1016/j.molstruc.2006.12.005

M3 - Article

AN - SCOPUS:34548319746

SN - 0022-2860

VL - 842

SP - 1

EP - 5

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

IS - 1-3

ER -

Synthesis and spectroscopic structural investigations of the charge-transfer complexes formed in the reaction of 2,6-diaminopyridine with π-acceptors TCNE, chloranil, and DDQ

Abstract

Keywords

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