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Stepwise Charge Transfer Complexation of Some Pyrimidines with σ-Acceptor Iodine Involving a New Unconventional Acceptor by Usama. M. Rabie; Ramadan. A. Mohamed; Moustafa. H. Abou-El-Wafa is a Chemistry article available to read on EtoBox.

What is Stepwise Charge Transfer Complexation of Some Pyrimidines with σ-Acceptor Iodine Involving a New Unconventional Acceptor about?

Interactions of some pyrimidine derivatives, 4-amino-2,6-dimethylpyrimidine, kyanmethin, (4AP), 2-amino-4,6-dimethylpyrimidine (2AP), 2-aminopyrimidine (AP), 2-amino-4-methylpyrimidine (AMP), 2-amino-4-methoxy-6-methylpyrimidine (AMMP), and 4-amino-5-chloro-2,6dimethylpyrimidine (ACDP) as electron donors, with iodine (I 2 ), as a typical -electron acceptor, have been studied. Electronic absorption spectra of these interactions in several organic solvents of different polarities have performed instant appearance of clear charge transfer (CT) bands. Formation constants (K CT ), molar absorption coefficients (ε CT ) and thermodynamic properties, H, S, and G, of these interactions have been determined and discussed. Electronic absorption spectra of the solutions of the synthesized pyrimidines-iodine, P-I 2 , CT complexes have shown the characteristic bands of the triiodide ion, I 3 -. UV/vis spectral tracking of these interactions have shown that by lapse of time the first formed CT complex, P-I 2 , is transformed to the corresponding triiodide complex, P + I.I 3 -, then, the later interacts as a new unconventional acceptor and it forms a CT complex of the form (P).(P + I.I 3 -). Eleme

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Author

Usama. M. Rabie; Ramadan. A. Mohamed; Moustafa. H. Abou-El-Wafa

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Pergamon Press Ltd.; Elsevier BV (ISSN 1386-1425)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)