Mononuclear nickel(ii)–flavonolate complexes of tetradentate tripodal 4N ligands as structural and functional models for quercetin 2,4-dioxygenase: structures, spectra, redox and dioxygenase activity† † Electronic supplementary information (ESI) available. CCDC 1956984 and 2039217. For ESI and crystallographic data in CIF or other electronic format see DOI: https://doi.org/10.1039/d3ra04834a

ABSTRACT: Three new nickel(ii)-flavonolate complexes of the type [Ni(L)(fla)](ClO4) 1–3, where L is the tripodal 4N ligand tris(pyrid-2-ylmethyl)amine (tpa, L1) or (pyrid-2-ylmethyl)bis(6-methylpyrid-2-ylmethyl)amine (6-Me2-tpa, L2) or tris(N-Et-benzimidazol-2-ylmethyl)amine (Et-ntb, L3), have been isolated as functional models for Ni(ii)-containing quercetin 2,4-dioxygenase. Single crystal X-ray structures of 1 and 3 reveal that Ni(ii) is involved in π-back bonding with flavonolate (fla−), as evident from enhancement in C

SUBMITTER: Ajaykamal T 

PROVIDER: S-EPMC10436029 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature