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Synthesis, structural and physicochemical characterization of a new type Ti6-oxo cluster protected by a cyclic imide dioxime ligand

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Abstract

Reaction of the cyclic ligand (2Z,6Z)-piperidine-2,6-dione dioxime with TiCl4 and KOH yielded the hexanuclear cluster K6[TiIV63-O)22-O)3(CH3O)62–η112-Hpidiox-O,N,O′)42–η112-pidiox-O,N,O′)2]·7.5CH3OH possessing a new {Ti6O5} structural motif. The cluster core {Ti6O5} is wrapped by external tripodal imide dioxime ligands, showing good solubility and stability and thus, allowing its solution to be studied by means of electrospray ionization mass spectrometry, electrochemistry and 2D NMR, c. w. EPR and UV-vis spectroscopies. Density Functional Theory (DFT) calculations reveal that the cyclo-Ti3 metallic cores exhibit metallaromaticity which is expected to contribute to the stabilization of this system.

Graphical abstract: Synthesis, structural and physicochemical characterization of a new type Ti6-oxo cluster protected by a cyclic imide dioxime ligand

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Publication details

The article was received on 13 Feb 2019, accepted on 14 Feb 2019 and first published on 14 Feb 2019


Article type: Paper
DOI: 10.1039/C9DT00658C
Citation: Dalton Trans., 2019, Advance Article

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    Synthesis, structural and physicochemical characterization of a new type Ti6-oxo cluster protected by a cyclic imide dioxime ligand

    S. S. Passadis, S. Hadjithoma, A. G. Kalampounias, A. C. Tsipis, S. Sproules, H. N. Miras, A. D. Keramidas and T. A. Kabanos, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT00658C

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