Universität zu Köln

Hegemann, Corinna, Heidemann, Tim, Pantenburg, Ingo and Mathur, Sanjay (2018). Influence of Metal Fragment Mobility and Solution Dynamics on Cationic Rearrangements in Multimetallic Alkoxide Frameworks. ChemistrySelect, 3 (1). S. 5 - 11. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 2365-6549

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Abstract

Multimetallic alkoxides show manifold dynamics in solution comprising ligand switching among different sites (terminal, doubly or triply bridging), coordination lability of alkoxometallate units ({M(OR)(x)(-)}) and rearrangement of metal centers. Solution behavior and structural investigations of heterobimetallic iodide isopropoxides [IM{Ce-2(OPri)(9)}](2) (M=Cd (1), Ba (2)) and corresponding potassium alkoxometallates of Sr and Al revealed equilibrium of several interconverting species that rearrange to form stable monomeric or dimeric trimetallic frameworks. Quantitative formation of dimeric heterotrimetallic alkoxides [{Cd(OPri)(3)}Sr{Ce-2(OPri)(9)}](2) (3), [{Cd(OPri)(3)}Ba{Ce-2(OPri)(9)}](2) (4) and monomeric [{Al(OPri)(4)}(HOPri)Ba{Ce-2(OPri)(9)}] (5) confirmed the tendency of metallo-fragments to rearrange themselves for achieving the maximum possible coordination number for constituent metals. Multinuclear NMR spectroscopy, elemental analysis, mass spectrometry and X-ray diffraction analyses verified the potential of electronically and sterically unsaturated alkoxometallate units in initiating the redistribution of metal centers.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hegemann, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Heidemann, Tim UNSPECIFIED UNSPECIFIED UNSPECIFIED Pantenburg, Ingo UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-198994
DOI:	10.1002/slct.201702252
Journal or Publication Title:	ChemistrySelect
Volume:	3
Number:	1
Page Range:	S. 5 - 11
Date:	2018
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	2365-6549
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MOLECULAR-STRUCTURE; HETEROMETALLIC ALKOXIDES; CHEMICAL ROUTES; PRECURSORS; CRYSTAL; OXIDE; CERIA; REACTIVITY; NANOPARTICLES; SUBSTITUTION Multiple languages Chemistry, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19899