Preparation, crystal structure and solution studies of [Mn2L2Cl4(H2O)(2)], where L=2-(2 '-pyridyl)quinoxaline
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Garoufis, A.
Kasselouri, S.
Boyatzis, S.
Raptopoulou, C. P.
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peer reviewed
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Polyhedron
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The reaction of MnCl2.4H(2)O with the biheteroaromatic ligand (L), formed the dinuclear complex bis[aquachloro-2-(2'-pyridyl)quinoxaline]di-mu-chloro dimanganese {[Mn2L2Cl4(H2O)(2)]}, which was studied in the solid state by thermal techniques [thermogravimetry (TG), differential thermogravimetry (DTG) and differential thermal analysis (DTA)], spectroscopy (IR, far-IR, electronic spectra), magnetic susceptibility, X-ray diffraction methods as well as in methanolic solution by electrospray mass spectrometry (ES-MS). The X-ray crystal structure showed two manganese(II) ions bridged by two chloro ligands with a terminal chloride, a water molecule and a chelating molecule of L, completing a six-coordinate octahedral geometry around each metal centre. The complex in methanolic solution decomposes, forming various monomeric species, as observed from both conductivity measurements and ES-MS. Anions of the general formula [(MnCl2)Cl](n)(-), where n=1, 2, 3, 4 and 5, were also observed in the negative ES mode. (C) 1999 Elsevier Science Ltd. All rights reserved.
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crystal structure, manganese(ii) dinuclear complex, electrospray ms, 2-(2 '-pyridyl)quinoxaline, biheteroaromatic ligand 2-(2'-pyridyl)quinoxaline, phase ion chemistry, gas-phase, mass-spectrometry, metal-complexes, electrospray, 2,2'-bipyridine, coordination, 1st
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<Go to ISI>://000080917600012
http://ac.els-cdn.com/S0277538799000297/1-s2.0-S0277538799000297-main.pdf?_tid=9909bdae-5809-11e3-ac51-00000aacb361&acdnat=1385628579_100232385f9dce7813f876e732c3ea65
http://ac.els-cdn.com/S0277538799000297/1-s2.0-S0277538799000297-main.pdf?_tid=9909bdae-5809-11e3-ac51-00000aacb361&acdnat=1385628579_100232385f9dce7813f876e732c3ea65
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en
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Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας