7773-01-5Relevant articles and documents
Chlorination of manganese oxides
Fouga, Gastón G.,De Micco, Georgina,Bohé, Ana E.
, p. 141 - 146 (2009)
In this work the reaction between several manganese oxides and chlorine is investigated. The reaction path for the chlorination of the oxides is established, which involves recrystallization of high valence manganese oxides: Mn3O4 an
MASS-SPECTROMETRIC MEASUREMENTS OF THERMODYNAMIC PROPERTIES OF THE MOLTEN KCl-MnCl2 SYSTEM.
Sasamoto,Itoh,Sata
, p. 2415 - 2419 (1983)
Activities and heats of mixing for the molten KCl-MnCl//2 system were determined mass-spectrometrically by the ion-current ratio method. Activities of components KCl and MnCl//2 show large negative deviations from Raoult's law, indicating a very strong interaction between KCl and MnCl//2. Entropies of mixing calculated from measured activities and heats of mixing have minimum values in the vicinity of 33% MnCl//2, and have been compared with those calculated on the basis of some molten structure models to infer possible chemical species in the molten salt.
Study on coordination behaviour of manganese chloride with L-α-histidine
Shengli,Sanping,Huanyong,Rongzu,Qizhen
, p. 795 - 805 (2004)
The reaction thermodynamic and kinetic equations for the non-reversible reactions are established. The enthalpy change of formation reaction of manganese(II) histidine (His) complex in water has been determined by microcalorimetry, using manganese chlorid
Pyridine-type complexes of transition-metal halides. Part XV. Mn(II) chloride complexes with 3,4- and 3,5-lutidine
Szecsenyi, K. Mészáros,Wadsten,Kovács,Liptay
, p. 965 - 974 (2004)
Manganese(II) chloride complexes with 3,4- and 3,5-lutidine have been prepared. The crystal symmetry and cell dimensions have been calculated on the basis of powder diffraction data. The compounds were characterised also by FT-IR spectrometry. The thermal
Evolution from discrete mononuclear complexes to trinuclear linear cluster and 2D coordination polymers of Mn(II) with dihydrazone Schiff bases: Preparation, structure and thermal behavior
Bourosh, Paulina N.,Bulhac, Ion,Ch. Kravtsov, Victor,Cocu, Maria,Croitor, Lilia,Danilescu, Olga,Petuhov, Oleg
, (2021)
Four Mn(II) coordination compounds based on the 2,6-diacetylpyridine bis(isonicotinoylhydrazone) (H2L1) and 2,6-diacetylpyridine bis(nicotinoylhydrazone) (H2L2), were prepared using different synthetic condition
Enhanced Stability of the FeII/MnII State in a Synthetic Model of Heterobimetallic Cofactor Assembly
Kerber, William D.,Goheen, Joshua T.,Perez, Kaitlyn A.,Siegler, Maxime A.
, p. 848 - 857 (2016)
Heterobimetallic Mn/Fe cofactors are found in the R2 subunit of class Ic ribonucleotide reductases (R2c) and R2-like ligand binding oxidases (R2lox). Selective cofactor assembly is due at least in part to the thermodynamics of MII binding to the apoprotein. We report here equilibrium studies of FeII/MnII discrimination in the biomimetic model system H5(F-HXTA) (5-fluoro-2-hydroxy-1,3-xylene-α,α′-diamine-N,N,N′,N′-tetraacetic acid). The homobimetallic F-HXTA complexes [Fe(H2O)6][1]2·14H2O and [Mn(H2O)6][2]2·14H2O (1 = [FeII2(F-HXTA)(H2O)4]-; 2 = [MnII2(F-HXTA)(H2O)4]-) were characterized by single crystal X-ray diffraction. NMR data show that 1 retains its structure in solution (2 is NMR silent). Metal exchange is facile, and the heterobimetallic complex [FeIIMnII(F-HXTA)(H2O)4]- (3) is formed from mixtures of 1 and 2. 19F NMR was used to quantify 1 and 3 in the presence of excess MII(aq) at various metal ratios, and equilibrium constants for FeII/MnII discrimination were calculated from these data. FeII is preferred over MnII with K1 = 182 ± 13 for complete replacement (2 21). This relatively modest preference is attributed to a hard-soft acid-base mismatch between the divalent cations and the polycarboxylate ligand. The stepwise constants for replacement are K2 = 20.1 ± 1.3 (2 23) and K3 = 9.1 ± 1.1 (3 21). K2 > K3 demonstrates enhanced stability of the heterobimetallic state beyond what is expected for simple MnII FeII replacement. The relevance to FeII/MnII discrimination in R2c and R2lox proteins is discussed.
Stevens, C. G.,Turkdogan, E. T.
, p. 370 - 373 (1954)
ALLan, J. R.,Brown, D. H.,Nuttall, R. H.,Sharp, D. W. A
, p. 1865 - 1867 (1965)
New complexes of 4-[(4-fluorophenyl)amino]-4-oxobut-2-enoic acid with selected transition metal ions: Synthesis, thermal, and magnetic properties
Ferenc,Sadowski,Tarasiuk,Cristóv?o,Osypiuk,Sarzyński
, p. 2719 - 2727 (2017/12/26)
Complexes of 4-[(4-fluorophenyl)amino]-4-oxobut-2-enoic acid, HL, with Mn(II), Co(II), Ni(II), Cu(II), Nd(III), Gd(III), and Er(III) were synthesized and characterized by various physico-chemical methods: elemental analysis, FT-IR, TG, DTG, DSC, TG/FT-IR, XRF, XRD, and magnetic measurements using the Gouy’s method and a SQUID-VSM magnetometer. The complexes were found to be hydrates (except Er(III) complex) containing 1 to 4 molecules of water. The carboxylate groups acted as bidentate ligands.
