Crystal Structure of the Monoprotonated Tripodal Ligand Tris(2,2’- bipyrid-6-yl) Methanol

Cuhananthan W. Sathiyajith*, James C. Knight, Benson M. Kariuki, Peter G. Edwards, Angelo J. Amoroso*
School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK

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© Sathiyajith et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the School of Chemistry Cardiff University Main Building, Park Place, Cardiff CF10 3AT UK; Tel: +44 (0)29 208 74077; Fax: +44 (0)29 208 74030; E-mails: and


The tripodal bipyridine-based ligand tris(2,2’-bipyrid-6-yl) methanol (L 1 ) was shown in our previous work to have a strong steric preference for trigonal prismatic co - ordination environments with a series of transition metals. We now report the crystal structure of the ligand framework, isolated in its monoprotonated form with a perchlorate counterion. The structure was solved in a monoclinic space group C2/c with cell parameters, a = 21.5885(3), b = 11.7485(3), c = 24.6939(6) Å, α = 90°, β = 110.790(1) °, γ = 90°, volume = 5855.4(2) Å3 , Z = 8. The 1H NMR of the protonated ligand is similar to the parent ligand and showed the compound retained its 3-fold symmetry and all bipyridine groups were equivalent.

We report the crystal structure of the protonated form a tripodal bipyridine-based ligand framework with a strong steric preference for trigonal prismatic co-ordination environments.

Keywords: Bipyridine, crystal structure, trigonal prismatic, tripodal ligand.