Abstract
Complexation of dimethyl-6,6′-(2-hydroxy-5-methyl-1,3-phenylene)bis(methylene)bis((2-hydroxyethyl)azanediyl)bis(methylene)dipicolinate (Me2H3L4) and 2,2′-(2-hydroxy-5-methyl-1,3-phenylene)bis(methylene)bis(((6-methylpyridin-2-yl)methyl)azanediyl)diethanol (H3L5) with Zn(II) afforded the complexes [Zn2(H2L4)(H2O)2](ClO4) and [Zn2(H2L5)(CH3CO2)(H2O)](PF6)2·2H2O, which were characterized by 1H and 13C NMR spectroscopy, mass spectrometry, microanalysis, and the former by X-ray crystallography. Functional studies of the zinc complexes with the substrate bis(2,4-dinitrophenyl)phosphate (BDNPP) showed the complexes to be competent catalysts with kcat=3.52±0.03×10−4 and 1.27±0.04×10−3s−1 (Km=6.7±0.9; 13.8±1.5mM), with catalytically relevant pKas of 9.4 and 6.6, respectively. The pKa values are discussed with respect to the potential nucleophilic species and the effect of the donor environment.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
