Complexes of uracil (2,4-Dihydroxypyrimidine) Derivatives. Part I. Cu(II), Ca(II) and MG(II) Coordination with Uracil and Related Compounds in Aqueous Solution

Kufelnicki, A.; Kupińska, I.; Jezierska, J.; Ochocki, J.

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Complexes of uracil (2,4-Dihydroxypyrimidine) Derivatives. Part I. Cu(II), Ca(II) and MG(II) Coordination with Uracil and Related Compounds in Aqueous Solution

Autorzy

Kufelnicki A. , Kupińska I. , Jezierska J. , Ochocki J.

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Warianty tytułu

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Abstrakty

Potentiometric pH studies were carried out on proton and metal (Cu(II), Ca(II) and Mg(II)) complexes of HL = uracil, thymine (5-methyluracil), 6-chloromethyluracil, 5-hydroxymethyluracil, 6-methyluracil and a diethyl 6-uracilmethylphosphonate derivative. For Cu(II) additional spectroscopic (absorption and EPR) measurements were carried out. The results have been compared with the literature data accessible only for uracil and thymine. A deprotonation of the ML complexes in a more basic solution was indicated, thus, extending the coordination mode proposed up to now for uracil and thymine. An electron withdrawing effect of substituents has been found for 6-chloromethyluracil and diethyl 6-uracilmethylphosphonate.

Słowa kluczowe

copper calcium magnesium uracil ligands coordination modes subsstituent effects

Wydawca

Polskie Towarzystwo Chemiczne

Czasopismo

Polish Journal of Chemistry

Rocznik

2002

Tom

Vol. 76 / nr 11

Strony

1559--1570

Opis fizyczny

Bibliogr. 32 poz., rys.

Twórcy

autor

Kufelnicki A.

Laboratory of Physical and Biocoordination Chemistry, Medical University of Łódź, 1 Muszyński Str., 90-151 Łódź, Poland

autor

Kupińska I.

Laboratory of Physical and Biocoordination Chemistry, Medical University of Łódź, 1 Muszyński Str., 90-151 Łódź, Poland

autor

Jezierska J.

Faculty of Chemistry, University of Wroclaw, 14 Joliot-Curie Str., 50-383 Wrocław, Poland

autor

Ochocki J.

Laboratory of Bioinorganic Chemistry, Medical University of Łódź, 1 Muszyński Str., 90-151 Łódź, Poland

Bibliografia

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Bibliografia

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