72087-35-5Relevant academic research and scientific papers
Transformation of maleato manganese(II): Temperature effect and coordination modes
Chen, Hong-Bin,Zhang, Hui,Yang, Jin-Mei,Zhou, Zhao-Hui
, p. 987 - 991 (2004)
Two maleato bipyridine manganese(II) coordination polymers [Mn(male)(bpy)(H2O)]n·2nH2O (1) and [Mn(male)(bpy)]n (2) (H2male=maleic acid, bpy=2,2 ′-bipyridine) were prepared in an ice-bath and at room temperature respectively, and were spectroscopically and structurally characterized. Complex 1 obtained at low temperature, possesses a one-dimensional helical chain in the solid state with hepta-coordination number at the manganese center. At room temperature, the hydrated complex 1 was irreversibly converted into the thermodynamically stable dehydrated product 2 with octahedral coordination. A similar dehydration effect was observed for the maleato manganese(II) complex with a more conjugated phenanthroline (phen) ligand. The maleato manganese(II) coordination polymer [Mn(male)(phen)] n·nH2O (3) can be converted into the dehydrated product [Mn(male)(phen)]n (4) upon heating, while the resultant product retains a similar pattern of coordination mode.
A comparative study on the thermal decomposition of some transition metal maleates and fumarates
Randhawa,Kaur
, p. 251 - 255 (2008/10/09)
Thermal decomposition of M(mal/fum)?xH2O (M=Mn, Co, Ni) has been studied in static air atmosphere from ambient to 500°C employing TG-DTG-DTA, XRD and IR spectroscopic techniques. After dehydration the anhydrous maleate salts decompose to metal oxalate in the temperature range of 320-360°C, which at higher temperature undergo an abrupt oxidative pyrolysis to oxides. The anhydrous fumarate salts have been found to decompose directly to oxide phase. A comparison of thermal analysis reveals that fumarates are thermally more stable than maleates.
