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Manganese(II) complexes of 2,3,5,6-tetra-(2-pyridyl)pyrazine - syntheses, crystal structures, spectroscopic, magnetic and catalytic properties.

Autorzy

Barbara Machura

J. Palion

Jerzy Mroziński

Bożena Kalińska

M. Amini

Mohammad Mahdi Najafpour

Rok wydania

2013

Czasopismo

Polyhedron

Numer woluminu

53

Strony

132-143

DOI

10.1016/j.poly.2013.01.015

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

A systematic studies on complex formation between Mn(II) ions, 2,3,5,6-tetra(2-pyridyl)pyrazine and halide or pseudohalide (N3−, NCS− and N(CN)2−) ligands have been carried out and the following complexes [Mn2(μ-Cl)2Cl2(tppz)2] (1), [Mn2Cl2(μ-N3-κN1)2(tppz)2] (2), [MnCl(SCN)(tppz)(H2O)]·H2O (3), [MnCl(dca)(tppz)(H2O)0.57(MeOH)0.47] (4), [Mn(NO3)2(tppz)(H2O)] (5), [Mn(N3)(NO3)(tppz)(H2O)] (6), [Mn(SCN)2(tppz)] (7) and [Mn(NO3)(dca)(tppz)]n (8) have been obtained. The compounds were characterized by elemental analysis, IR, EPR, magnetic measurements and X-ray analysis. Two of them (5 and 6) have been tested as catalysts in oxidation of alcohol to aldehydes/ketones using oxone (2KHSO5·KHSO4·K2SO4) as an oxidant under biphasic reaction conditions (CH2Cl2/H2O) and tetra-n-butylammonium bromide as phase transfer agent under air at room temperature and as catalysts in oxidation of sulfides to sulfoxides with UHP (urea hydrogen peroxide) as oxidant.

Słowa kluczowe

Manganese(II), molecule, Ion, photoluminescence, 6-Tetra(2-pyridyl)pyrazine, X-ray structure, Magnetic properties, catalytic activity

Adres publiczny

http://dx.doi.org/10.1016/j.poly.2013.01.015

Strona internetowa wydawcy

http://www.elsevier.com

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