Skip to main content

Research Repository

Advanced Search

Unexpected linkage isomerism in chiral tetranuclear bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) grids

Hegarty, Isabel N.; Dalton, Hannah L.; Henwood, Adam F.; Hawes, Chris S.; Gunnlaugsson, Thorfinnur


Isabel N. Hegarty

Hannah L. Dalton

Adam F. Henwood

Thorfinnur Gunnlaugsson


The synthesis of a chiral bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) ligand is described and its coordination chemistry with Cu(NO3)2 and [Cu(MeCN)4]PF6 is explored in the crystalline phase as well as in solution. Chiral [2 × 2] tetranuclear square grid complexes [Cu4(H21)4](NO3)8 and [Cu4(H1)4](PF6)4 were observed, and crystallographically analysed, these being linkage isomers with N4O2 and N5O coordination spheres, respectively. These come about by an unusual in situ amide deprotonation and coordination, which accompanies a CuI ? CuII oxidation process.

Acceptance Date Jul 15, 2019
Publication Date Aug 18, 2019
Journal Chemical Communications
Print ISSN 1359-7345
Publisher Royal Society of Chemistry
Pages 9523-9526
Publisher URL