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Uncommon coordination modes of a potential heptadentate aminophenol donor
Published:
14 November 2020
by MDPI
in The 24th International Electronic Conference on Synthetic Organic Chemistry
session General Organic Synthesis
Abstract:
This work describes the synthesis, characterization and reactivity towards HoIII of a potential heptadentate N4O3 aminophenol donor. The crystal structure of the [Ho(1,1,4-H3L)(1,1,4-H6L)] complex (1,1,4-H6L = 6,6'-(2-(5-bromo-2-hydroxy -3-nitrobenzyl)-2,5,8,11-tetraazadodecane-1,12-diyl)bis(4-bromo-2-nitrophenol)) shows that the holmium atom binds two aminophenol ligands, one acting as trianionic hexadentate, and the other one as neutral monodentate. As far as we know, both coordination modes of the aminophenol are hitherto unknown for this kind of scarcely reported ligand. This leads to a coordination number of 7 for the HoIII ion, which is in a capped trigonal prism environment.
Keywords: Aminophenol; potential heptadentate donor; holmium (III)