Unexpected linkage isomerism in chiral tetranuclear bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) grids
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2019Author:
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Hegarty, I.N., Dalton, H.L., Henwood, A.F., Hawes, C.S., Gunnlaugsson, T., Unexpected linkage isomerism in chiral tetranuclear bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) grids, Chemical Communications, 2019, 55, 9523-9526Abstract:
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.
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Science Foundation Ireland
13/1A/1865
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http://people.tcd.ie/gunnlaut
Author: Gunnlaugsson, Thorfinnur
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Chemical Communications;55;
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crystalline phase, oxidation process, linkage isomersDOI:
http://dx.doi.org/10.1039/c9cc03316eMetadata
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