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

Autor:	Adel Mostafa, El-Metwally Nour, Hassan S. Bazzi, Siham Y. AlQaradawi
Rok vydání:	2007
Předmět:	Chloroform 2 6-Diaminopyridine Chloranil Infrared Organic Chemistry Spectra Tetracyanoethylene DDQ Photochemistry Benzoquinone CT-complexes Analytical Chemistry Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry TCNE Titration Absorption (chemistry) Spectroscopy Stoichiometry
Zdroj:	Journal of Molecular Structure. 842:1-5
ISSN:	0022-2860
DOI:	10.1016/j.molstruc.2006.12.005
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73a071225a00eae350e5138b0e2646ce https://doi.org/10.1016/j.molstruc.2006.12.005 Zobrazit plný text záznamu Full Text from ScienceDirect