The unanti-cipated oxidation of a tertiary amine in a tetra-cyclic glyoxal-cyclam condensate yielding zinc(II) coordinated to a sterically hindered amine oxide.

ABSTRACT: The complex, tri-chlorido-(1,4,11-tri-aza-8-azonia-tetra-cyclo-[6.6.2.0^4,16.0^11,15]hexa-decane 1-oxide-κO)zinc(II) monohydrate, [ZnCl₃(C₁₂H₂₃N₄O)]·H₂O, (I), has monoclinic symmetry (space group P2₁/n) at 120 K. The zinc(II) center adopts a slightly distorted tetra-hedral coordination geometry and is coordinated by three chlorine atoms and the oxygen atom of the oxidized tertiary amine of the tetra-cycle. The amine nitro-gen atom, inside the ligand cleft, is protonated and forms a hydrogen bond to the oxygen of the amine oxide. Additional hydrogen-bonding inter-actions involve the protonated amine, the water solvate oxygen atom, and one of the chloro ligands.

SUBMITTER: Hubin DJ 

PROVIDER: S-EPMC10993591 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature