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The reaction heats and PM5 semiempirical studies of complexes formed between silicon podand and monovalent cations

✍ Scribed by Bogusława Łęska; Piotr Przybylski; Joanna Wyrwał; Bogumił Brzezinski; Grzegorz Schroeder; Volodimir Rybachenko; Angelamaria Maia

Book ID
104058183
Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
333 KB
Volume
733
Category
Article
ISSN
0022-2860

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✦ Synopsis

Silicon podands (1-10) were synthesised and their complexation reaction of Na C cations were studied by calorimetric and PM5 theoretical methods. Both methods provide evidence for formation of the respective complexes with Na C cations of different stoichiometry. In most cases, only formation of the complexes of 1:1 stoichiometry has been observed. For compounds with longer oxaalkyl chains (9 and 10) the formation of 1:4 and 1:6 complexes has been found. The structures of the complexes are visualised and discussed.

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ESI MS and PM5 semiempirical studies of gossypol schiff base with (R)-tetrahydrofurfurylamine complexes and monovalent cations
✍ Piotr Przybylski; Magdalena Włodarz; Grzegorz Schroeder; Radosław Pankiewicz; Bo 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 342 KB

Complexation of monovalent cations by a new Schiff base of gossypol with (R)-tetrahydrofurfurylamine (GSTF) has been studied by ESI mass spectrometry as well as by PM5 semiempirical method. On the basis of ESI spectra it has been found that the new gossypol Schiff base forms only 1:1 complexes with