Jump to main content
Jump to site search

Issue 1, 2014
Previous Article Next Article

Hydrogen-bond-supported dimeric boron complexes of potentially tetradentate β-diketiminate ligands

Author affiliations

Abstract

Two dimeric boron complexes of potentially tetradentate and trianionic β-diketiminate ligands bearing phenol substituents were prepared and characterized. The synthetic routes employed were designed to circumvent the undesirable formation of β-ketimines and 2-methylbenzoxazoles observed when traditional synthetic routes toward the target β-diketiminate ligands were attempted. The title complexes were isolated via demethylation of β-diketimine ligands and boron difluoride complexes bearing 2-anisole N-aryl substituents using boron tribromide. The resulting complexes were found to contain a unique hydrogen-bond-supported boron–oxygen–boron bridge, as confirmed by X-ray crystallography. The stability of the resulting dimeric structures relative to the corresponding monomeric, tetradentate boron complexes was studied computationally, and theory confirmed that the dimeric structures were strongly favored. The absorption spectra of the dimers were red-shifted relative to the parent β-diketimine ligands. The complexes were irreversibly oxidized and reduced electrochemically and were weakly emissive at low concentrations (Stokes shifts between 23 and 31 nm), showing little solvent dependence.

Graphical abstract: Hydrogen-bond-supported dimeric boron complexes of potentially tetradentate β-diketiminate ligands

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 10 Aug 2013, accepted on 24 Sep 2013 and first published on 07 Oct 2013


Article type: Paper
DOI: 10.1039/C3DT52188E
Citation: Dalton Trans., 2014,43, 240-250
  •   Request permissions

    Hydrogen-bond-supported dimeric boron complexes of potentially tetradentate β-diketiminate ligands

    S. M. Barbon, V. N. Staroverov, P. D. Boyle and J. B. Gilroy, Dalton Trans., 2014, 43, 240
    DOI: 10.1039/C3DT52188E

Search articles by author