Mn(III) and Cu(II) complexes of 1-((3-(dimethylamino)propylimino)methyl) naphthalen-2-ol): Synthesis, characterization, catecholase and phenoxazinone synthase activity and DFT-TDDFT study

Sengupta, Swaraj and Naath Mongal, Binitendra and Das, Suman and Panda, Tarun K and Mandal, T K and Fleck, Michel and Chattopadhyay, Shyamal K and Naskar, Subhendu (2018) Mn(III) and Cu(II) complexes of 1-((3-(dimethylamino)propylimino)methyl) naphthalen-2-ol): Synthesis, characterization, catecholase and phenoxazinone synthase activity and DFT-TDDFT study. Journal of Coordination Chemistry, 71 (8). pp. 1214-1233. ISSN 0095-8972

Full text not available from this repository. (Request a copy)

Abstract

Two new complexes, [MnL2](ClO4) (1) and [CuL2] (2) (where LH=(E)-1-((3-(dimethylamino)propylimino)methyl)naphthalen-2-ol), have been synthesized and characterized by spectroscopic techniques and their molecular structures are established by single-crystal X-ray diffraction study. Complex 1 adopts an octahedral geometry around the central manganese atom which is in+3 oxidation state, whereas in complex 2, the Cu+2 ion preferred a square pyramidal environment around it through the ligand donor atoms. Both complexes were tested for catecholase and phenoxazinone synthase activity. Complex 1 catalyzes the oxidation of 3,5-ditertiary-butyl catechol with a k(cat) value of 6.8424x10(2)h(-1) in acetonitrile whereas the same for complex 2 is 3.7485x10(2)h(-1) in methanol. Phenoxazinone synthase activity was shown only by complex 2 having k(cat)=74.225h(-1). Structures of both the title complexes have been optimized by means of DFT calculations. Experimental electronic spectra of the complexes have been corroborated by TDDFT analysis. Electrochemical investigations by means of cyclic voltammetry have been carried out to study the electron transfer processes in the complexes.

[error in script]

IITH Creators: