Synthesis, X‐ray structure, characterization and catalytic activity of a polymeric manganese(II) complex with iminodiacetate

Abstract

A polymeric manganese(II) complex with the general formula [Mn(O 2 CCH 2 NH 2 CH 2 CO 2 ) 2 (H 2 O) 2 ] n from reaction of iminodiacetatic acid and manganese(II) perchlorate under nitrogen in water, was synthesized and characterized. The structure of the complex was determined using single-crystal X-ray diffraction, elemental analysis, IR and UV-vis spectra. This complex exhibited excellent catalytic activity and selectivity for oxidation of various alcohols and sulfides to the corresponding aldehydes/ketone and sulfoxides using urea hydrogen peroxide and oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ), respectively, as oxidants under air at room temperature. The easy preparation, mild reaction conditions, high yields of the products, short reaction time, no over-oxidation products, high selectivity and inexpensive system make this catalytic system a useful method for oxidizing various alcohols and sulfides.

Dinuclear Manganese(II), Cobalt(II), and Nickel(II) Aryl Phosphates Incorporating 4′‐Chloro‐2,2′:6′,2′′‐Terpyridine Coligands – Efficient Catalysts for Alcohol Oxidation

“…Although this mononuclear complex exhibits 100 % conversion and selectivity, the oxidant used in this case was oxone, an unfavored oxidant for organic oxidation reactions. Furthermore, it should be noted that the non‐heme Mn II complex reported by Nam and co‐workers (Table , Entry 3) and a polymeric Mn II complex reported by Bagherzadeh and co‐workers (Table , Entry 6) showed 100 % selectivity with reasonable conversion but only when harmful oxidants were employed as part of catalytic system. All of the other Mn II complexes show lower activities than that of catalyst 1 , as evidenced by their poor conversions.…”

Nanoparticle supported, magnetically separable vanadium complex as catalyst for selective oxidation of sulfides

“…Oxidation of sulfides to sulfoxides or sulfones is a fundamental chemical reaction and has been intensively studied due to economic and environmental benefits [11,[22][23][24][25]. The capability of d 0 metal complexes to activate peroxides led us to test the Fe 3 O 4 @SiO 2 @VO(salen) nanoparticles as a heterogeneous catalyst for selective oxidation of sulfides (table 1).…”

“…For this purpose and also to continue our study on the catalytic activity of metal complexes for synthesis of organic compounds [11][12][13][14][15] we herein report that an Fe 3 O 4 nanoparticle-supported vanadium(V) catalyst (Fe 3 O 4 @SiO 2 @VO(salen)) efficiently catalyzes selective oxidation of sulfides to sulfoxides using urea hydrogen peroxide (UHP) as oxidant. This catalytic system features two major novelties: (1) this is the first time that a magnetically recyclable nanocatalyst has been used in catalytic oxidation of sulfides and (2) this is the first report of a magnetically separable vanadium complex.…”

Efficient and selective oxidation of alcohols in water employing palladium supported nanomagnetic Fe3O4@hyperbranched polyethylenimine (Fe3O4@HPEI.Pd) as a new organic–inorganic hybrid nanocatalyst

“…Thus, the development of greener oxidation systems continues using less poisonous catalysts, oxidants, and solvents became a crucial aim for the catalysis and the search for environmentally friendly as well as economical oxidation processes . The oxone is relatively stable compound at room temperature, readily available, and a convenient and therefore is utilized for various transformations in organic synthesis . Selective oxidation processes represent a large class of organic reactions, which the improvement of green catalysts is a major concern in the field of chemical reactions.…”