Synthesis and Crystal Structure of [Mn2(H2sal)2(Hsal)2(H2O)4]. First Example of the Reductive Synthesis of a Binuclear Manganese(I) Salicylate Complex

Abstract

The synthesis and characterization of the first unique binuclear manganese(I) salicylate complex is described. The structure of the complex is unequivocally established with the help of an X-ray crystallographic study. The structure consists of two [MnO 6 ] units, containing octahedral Mn I ions, linked together by a bridging salicylato (Hsal ) ) ligand and each Mn I is chelated with a (H 2 sal) ligand. The complex possesses a metal oxidation state of +1 and is a rare example of a noncarbonyl or cyanide complex of a binuclear Mn I species. The effective magnetic moment per binuclear molecule ( l eff: ) at 27°C is 8.07 l B; that also describes the manganese (+1) oxidation state.

Synthesis, spectral and thermal characterization of nano-sized, oxo-centered, trinuclear carboxylate-bridged chromium(III) complexes of hydroxycarboxylic acids

“…where R = C 15 H 31 or C 17 H 35 . Table 1 Analytical and conductance results for the chromium(III) complexes.…”

“…Perusal of the literature reveals that a number of transition metals form complexes with hydroxycarboxylic ligands [15][16][17], but studies on chromium(III) complexes with such ligands are very limited. It has also been found that the mixed-ligand complexes of chromium(III) with higher fatty acids and hydroxycarboxylic acids are not reported so far.…”

Manganese Schiff Base Complexes, Crystallographic Studies, Anticancer Activities, and Molecular Docking

“…e mean IC 50 is the material concentration that reduces cell growth by 50% under the experimental conditions and is the average of triplicate measurements that were reproducible and statistically significant. e IC 50 is defined as the concentration of an inhibitor where the response is reduced by half testing viability via an MTT assay [84]. In other words, the dose of cytotoxic compound where 50% viability is achieved is the IC 50 when testing viability through an MTT assay [84,85].…”

“…e IC 50 is defined as the concentration of an inhibitor where the response is reduced by half testing viability via an MTT assay [84]. In other words, the dose of cytotoxic compound where 50% viability is achieved is the IC 50 when testing viability through an MTT assay [84,85].…”

Untitled

“…Mn(II) was found to be important for enzymatic systems with DNA. DNA and RNA polymerases 11,18 catalyze the replication and transcription of DNA and have a specific requirements for Mn(II) 12 -19 . In view of the above applications of Mn(II) the synthesis and characterization of the Mn(II) complexes with semicarbazide and thiosemicarbazide based ligands are highly desirable.…”