Investigation of the electronic and atomic structure of a diene-iron tricarbonyl block copolymer and the products of its thermal transformation by x-ray emission and exafs spectroscopy

Autor:	L.M. Bronshtein, A.T. Shuvayev, P.M. Valetskii, A. V. Kozinkin, Valery G. Vlasenko, F. M. Ovsyannikov, B. Yu. Khel'mer
Rok vydání:	1991
Předmět:	Crystallography chemistry.chemical_compound Coordination sphere Extended X-ray absorption fine structure Diene chemistry Atom General Engineering Copolymer Organic chemistry Molecule Molecular orbital Electronic structure
Zdroj:	Polymer Science U.S.S.R.. 33:2054-2061
ISSN:	0032-3950
Popis:	It has been shown by X-ray emission and by EXAFS spectrosxopy that, in the diene-iron tricarbonyl block copolymer investigated, the iron atoms are coordinated by butadiene and carbonyl ligands. During heat treatment, the diene-iron tricarbonyl fragment breaks up with the formation of polymers in which the iron atoms exist in a high-spin state and are chemically combined with the molecular orbitals of the butadiene fragments of not less than two polymeric chains, there being no metal-metal bond. Quantitative data has been obtained by EXAFS spectroscopy about the atomic structure in the nearest-neighbour coordination sphere of the iron atom in the polymers investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2ca5b28ceec849b4aca57ee8795b4fd https://doi.org/10.1016/0032-3950(91)90106-z Zobrazit plný text záznamu