Synthesis, physical properties and X-ray crystal structure of an oxovanadium(IV) complex of the pendant-arm macrocycle 6,13-dimethyl 1,4,8,11-tetra-azacyclotetradecane-6,13-diamine

Paul V. Bernhardt, Geoffrey A. Lawrance, Peter Comba, Lisandra L. Martin, Trevor W. Hambley

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)


The pendant-arm macrocyclic hexa-amine 6,13-dimethyl-1,4,8,11-tetra- azacyclotetradecane-6,13-diamine (L2) co-ordinates to the oxovanadium(IV) cation in a quinquedentate manner. The complex [VO(L 2)][ClO4]2 crystallises in the monoclinic space group C2/c, a = 25.220(4), b = 10.534(2), c = 16.321 (3) Å, β = 94.53(1)°. The vanadium atom is displaced by 0.397 Å above the macrocyclic plane of four nitrogens towards the oxo ligand, with a pendant amine occupying the trans site. Electron paramagnetic resonance and electronic spectra are consistent with the complex being a vanadyl penta-amine in solution as well as in the solid state.

Original languageEnglish
Pages (from-to)2859-2862
Number of pages4
Journal Journal of the Chemical Society - Dalton Transactions
Issue number9
Publication statusPublished - 1 Dec 1990
Externally publishedYes

Cite this