Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Issue 3, 2012
Previous Article Next Article

The first group 4 metal bis(imido) and tris(imido) complexes

Author affiliations


We report a combined experimental and computational study of the first bis(imido) and tris(imido) complexes of a group 4 metal. Reaction of [Ti(NAr)(NHAr)2(py)2] (1, Ar = 2,6-C6H3iPr2) with 3 equivs. of MeLi gave the lithium-stabilised tris(imide) [TiMe(NAr)3{Li(py)}3] (2). Reaction of 1 with 2 equivs. of MeLi in the presence of ArNH2 gave the corresponding bis(imide) [Ti(NAr)2(NHAr)2{Li(py)}2] (3). All three compounds 1, 2 and 3 have substantial Ti–Nimide multiple bond character. Orbital and Mayer bond order analysis show that the formal bond orders are best viewed as ca. 3, 2.5 and 2, respectively, with a further attenuating effect on the multiple bonding by the [Li(py)]+ ion coordination. Compounds 2 and 3 are the first examples of any group 4 metal simultaneously containing two or three multiply-bonded ligands.

Graphical abstract: The first group 4 metal bis(imido) and tris(imido) complexes

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Oct 2011, accepted on 09 Nov 2011 and first published on 09 Nov 2011

Article type: Edge Article
DOI: 10.1039/C1SC00786F
Chem. Sci., 2012,3, 819-824

  •   Request permissions

    The first group 4 metal bis(imido) and tris(imido) complexes

    A. D. Schwarz, A. J. Nielson, N. Kaltsoyannis and P. Mountford, Chem. Sci., 2012, 3, 819
    DOI: 10.1039/C1SC00786F

Search articles by author