Spectroscopic, Thermal, Electrochemical, and Antimicrobial Studies of Mononuclear Manganese(II) Ditolyldithiophosphates

Abstract

New complexes of manganese(II) corresponding to [{(ArO)2PS2}2Mn] and [{(ArO)2PS2}2Mn.nL] (Ar = o-, m-, p-CH3C6H4 and p-Cl-m-CH3C6H3; n = 1, L = N2C12H8, N2C10H8; n = 2, L = NC5H5, P(C6H5)3) have been synthesized and characterized by microelemental analyses (C, H, and N), magnetic susceptibility, molar conductance, thermogravimetric, cyclic voltammetry, and spectral analyses including ESI mass spectrometry, IR, and UV-visible. The presence of a four-and-six coordinated Mn atoms has been established in the complexes and adducts, respectively. Antimicrobial screening of the complexes against gram negative bacteria E. coli, K. pneumonia, and P. aeruginosa and fungus S. rolfsii has shown potential bioactivity.

Synthesis, characterization and anti-cancer studies of Mn(II), Cu(II), Zn(II) and Pt(II) dithiocarbamate complexes - crystal structures of the Cu(II) and Pt(II) complexes

“…The band at 287 nm (34843 cm -1 ) in the electronic spectrum of the ligand is assigned to the intraligand n-π and π-π * transitions of the N-CSS moiety of the dithiocarbamate. The Mn(II) (C1) is a d 5 complex with zero crystal field stabilization energy in which electronic transitions are both spin and Laporte forbidden, hence no d-d transition was observed [41]. The band observed at 270 nm (37037 cm -1 ) is assigned to ligand to metal charge transfer transitions typical of four coordinate Mn(II) complex [42].…”

New isostructural transition metal complexes with a non-innocent dithiolate ligand

“…In recent years, dithiolate complexes have attracted considerable interest because of their technical applications as superconductors (Zou et al, 1997;Cassoux et al, 1991), pesticides (Szolnai, 1975;Geiger & Minest, 1975;Khajuria et al, 2013), resins and Q-switching dyes for IR spectroscopy (Bigoli et al, 1997;Drexhage & Mueller-Westerhoff, 1972;Yang et al, 2013), compounds with unusual magnetic properties (Coomber et al, 1996;Boudreaux & Mulay, 1976;Cerdeira et al, 2008Cerdeira et al, , 2012 and biocatalysts (Lancaster, 1988;Sellmann et al, 1996). The wide range of technical and biological applications can be attributed to the oxidation-reduction properties of dithiolate ligands.…”

Ni(II) complexes of dithiophosphonic acids

“…Thiophosphorus derivatives exhibit various biological activities such as anti-bacterial, anti-tumour and anti-fungal. [1][2][3] Some of the thiophosphorus analogues are used in agriculture as insecticide and herbicides. 4 This category which includes dithiophosphonates and dithiophosphinate (scheme 1) are among well-known bidentate ligands and have been widely investigated.…”