New examples of chelating triketone-like ligands that promote formation of binuclear complexes / Pestov Alexander V.,Khamidullina Liliya A.,Sosnovskikh Vyacheslav Y.,Slepukhin Pavel A.,Puzyrev Igor S. // POLYHEDRON. - 2016. - V. 106, l. . - P. 75-83.

ISSN/EISSN:

0277-5387 / нет данных

Type:

Article

Abstract:

The present work is to investigate of binding properties of chelating triketone-like ligands, which are able to forming of binuclear complexes. The studied compounds are able to exist in cyclic or `close form' (phenyl substituted or unsubstituted 2-hydroxy-2-(trifluoromethyl)chroman-4-ones) as well as in their associated `open form' (phenyl substituted or unsubstituted 1,1,1-trifluoro-4-(2-hydroxyphenyl)butan-2,4-diones). In this paper there is good evidence for the compounds are being in solid in `close form' (pre-ligands), whereas in basic solutions and when involved in metal ion coordination sphere they are being in `open form' (ligands). Protolytic equilibria of the compounds in aqueous ethylene glycol solutions were studied. Schemes of acid-base equilibria of these compounds were proposed. Apparent ionization constants of compounds containing electron-donor and electron-acceptor substituents in the benzene ring were determined using spectrophotometric method. The binding properties of 1,1, 1-trifluoro-4-(2-hydroxyphenyl)butan-2,4-dione towards Cu(II), Ni(II) and Co(II) were studied. The formation of 2:2 metal-ligand complexes was observed. X-ray analysis gives evidence the formation of complexes in which the ratio metal to ligand can be 1:2 and 2:2. Similar to beta-triketones the studied ligands tends to formation of binuclear complexes with transition metal ions. (C) 2016 Elsevier Ltd. All rights reserved.

Author keywords:

Chroman-4-ones; Binuclear complexes; Triketone-like ligands; Transition metal complexes; Crystal structure MAGNETIC-PROPERTIES; NICKEL(II) COMPLEXES; COPPER(II) COMPLEXES; MONONUCLEAR; MIXTURES

DOI:

10.1016/j.poly.2015.12.056

Web of Science ID:

ISI:000371100500011

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB 26
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	MAGNETIC-PROPERTIES; NICKEL(II) COMPLEXES; COPPER(II) COMPLEXES; MONONUCLEAR; MIXTURES
Research-Areas	Chemistry; Crystallography
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Crystallography
Author-Email	igor.puzyrev@gmail.com
Funding-Acknowledgement	Russian Federation {[}MK-7702.2015.3]
Funding-Text	This research was supported by the grant of the President of the Russian Federation MK-7702.2015.3.
Number-of-Cited-References	38
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	8
Journal-ISO	Polyhedron
Doc-Delivery-Number	DF1LF