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Functionalized imido-bridged Ti(IV) complexes as new building blocks for supramolecular arrangements: generation of a 1D structure through a Mg–ClI–C halogen bonding interaction
Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
E-mail: martaeg.mosquera@uah.es
; Fax: +34-918854683
; Tel: +34-918854655
Dalton Trans., 2013,42, 7074-7084
DOI:
10.1039/C3DT32943G
Received
08 Dec 2012,
Accepted
25 Feb 2013
First published online
26 Feb 2013
The new functionalized aryl-imido-bridged cyclopentadienyl titanium compounds [TiCl(η5-C5Me5){μ-NR}]2, R = 4-X-C6H4 (X = CN (2a), X = Cl (2b), X = I (2c), X = (OMe) (2d)); 3,5-(OMe)2C6H3 (2e) were prepared and their appropriateness as building blocks for constructing supramolecular structures was evaluated. The presence of a functional group in the para position within the aryl-imido ligand leads to the formation of 1D arrangement for 2a, 2c and 2d through halogen bonding or hydrogen bonding interactions. In particular, the imido titanium complex 2c forms a supramolecular chain with a [MgCl2·(THF)4] unit generated in the synthesis where the metallic fragments are connected by C–ICl–Mg halogen bonding interactions (XB), being the first example within group 2 metals where the XB motif M–ClI–C appears.
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