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Issue 24, 2015
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Imido-pyridine Ti(IV) compounds: synthesis of unusual imido–amido heterobimetallic derivatives

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Abstract

The reaction of lithiated picolines and [TiCl35-C5Me5)] leads to several bridging or terminal imido compounds, each of which can be selectively formed by controlling the stoichiometry and temperature. Specifically, the dinuclear imido-bridged [TiCl(η5-C5Me5)(μ-NR)]2 (1a, NR = 2-imido-3-picoline; 1b, NR = 2-imido-5-picoline) species and the unusual Ti–Li imido–amido heterobimetallic complex [{Li(THF)}{Ti(η5-C5Me5)(NR)(NHR)2}] (2a, NR = 2-imido-3-picoline; 2b, NR = 2-imido-5-picoline) were isolated. Compounds 2 are in effect the first structurally characterized examples of titanium(IV) coordinated to terminal imido-pyridines. DFT-D calculations for 2a denote a multiple bond character between titanium and the imido ligand and a strong polarization of the electron density by the alkali cation in spite of the lack of intermetallic bonding.

Graphical abstract: Imido-pyridine Ti(iv) compounds: synthesis of unusual imido–amido heterobimetallic derivatives

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Publication details

The article was received on 07 Apr 2015, accepted on 06 May 2015 and first published on 07 May 2015


Article type: Paper
DOI: 10.1039/C5DT01320H
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2015,44, 11119-11128
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    Imido-pyridine Ti(IV) compounds: synthesis of unusual imido–amido heterobimetallic derivatives

    S. Pedrosa, F. Vidal, L. M. Lee, I. Vargas-Baca, P. Gómez-Sal and M. E. G. Mosquera, Dalton Trans., 2015, 44, 11119
    DOI: 10.1039/C5DT01320H

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