Universität zu Köln

Podhorsky, Jan, Babiak, Michal, Pinkas, Jiri, Hegemann, Corinna, Mathur, Sanjay and Moravec, Zdenek (2021). New mixed-ligand organoaluminum heteroarylalkenolates. Polyhedron, 194. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-3719

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Abstract

We have successfully synthesized and structurally characterized eight novel aluminum compounds with N,O-B-heteroarylalkenolate ligands (L) containing a CF3 group. The reactions of 3,3,3-trifluoro(dimethyl1,3-oxazol-2-yl)propen-2-ol (H-DMOTFP), 3,3,3-trifluoro(pyridin-2-yl)propen-2-ol (H-PyTFP), and 3,3,3-trifluoro(1,3-benzthiazol-2-yl)propen-2-ol (H-BTTFP) with chloroalanes R2AlCl and RAlCl2 (R = Et, iBu) in dry aprotic solvents provided complexes displaying several types of molecular structures. Effects of ligand, solvent, and crystallization conditions were investigated. The most common and stable products were chloride complexes [AlCl(L)(2)] with five-coordinated aluminum centers represented by [AlCl (DMOTFP)(2)] (1) and [AlCl(PyTFP)(2)] (2). A six-coordinated aluminum complex with a coordinated THF was obtained as [AlCl(THF)(PyTFP)(2)] (2 center dot THF). Complexes with preserved alkyl groups [AlR(L)(2)] were isolated as [AlEt(BTTFP)(2)] (3) and [AliBu(DMOTFP)(2)] (4). An intermolecular rearrangement led to an ionic complex [Al(PyTFP)(2)(THF)(2)][iBuAlCl(3)] (5). In the reactions of H-BTTFP, the complex 3 with two ligands, as well as molecules [AlRCl(L)] with only one ligand attached were characterized as [AlEtCl(BTTFP)] (6) and [AliBuCl(BTTFP)] (7). The thermal properties of obtained complexes were investigated by TG/DSC and HT/XRD analyses. (C) 2020 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Podhorsky, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Babiak, Michal UNSPECIFIED UNSPECIFIED UNSPECIFIED Pinkas, Jiri UNSPECIFIED UNSPECIFIED UNSPECIFIED Hegemann, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Moravec, Zdenek UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-572690
DOI:	10.1016/j.poly.2020.114953
Journal or Publication Title:	Polyhedron
Volume:	194
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-3719
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RING-OPENING POLYMERIZATION; ALUMINUM; COMPLEXES; ALKOXIDES Multiple languages Chemistry, Inorganic & Nuclear; Crystallography Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57269