Abstract: The present study indicates EXAFS direct structural data obtained for zirconium ethoxide, iso- and n-propoxide are alike those for zirconium n-butoxide complexes. This is evident for agreement of structural units of abovementioned alkoxides complexes. Our group developed structural model of n-butoxide earlier. Six interconnected tetramers assemble a structural unit of the alkoxides under study. The tetramers build of zirconium atoms in the highly flattened pyramid corners. Four zirconium atoms are bonded in series by double bridges through oxygen atoms of alkoxide ligands. Two of the four zirconium atoms are bias bonded by single ligand bridges. The distances between pairs of zirconium atoms inside the tetramer are 3.3 and 3.5 Å. Tetramers are linked together also by a single ligand bridges. The distance between zirconium atoms of the two neighbor tetramers is 3.9 Å. Primary particles (tetramer sextet) form aggregates in a solution. Possible shapes of the anisotropically sized aggregates is a large diameter cylinder with small height (a disk), or a small diameter cylinder with large height (a rod). Primary particles composed through ligands. The distance between the neighbor zirconium atoms of different primary particles is 4.8 or 5.1 Å depending on the coordination nature and the neighboring particles number.

Cite: Kanazhevskiy V.V. , Chesalov Y.A. , Kotsarenko N.S. , Kochubey D.I.
Steric Factor in Ligand Displacement of Zirconium Alkoxides Dissolved in Alcohols
Journal of Organometallic Chemistry. 2011. V.696. N9. P.1879-1886. DOI: 10.1016/j.jorganchem.2011.02.030 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Dec 14, 2010
Accepted:	Feb 25, 2011
Published online:	Mar 4, 2011
Published print:	May 1, 2011

Identifiers:

Web of science:	WOS:000290019300025
Scopus:	2-s2.0-79955020003
Elibrary:	16995336
Chemical Abstracts:	2011:516244
Chemical Abstracts (print):	155:28464
OpenAlex:	W2077871260

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