52470-38-9

Usage

InChI:InChI=1/2C4H4O4.Mn/c2*5-3(6)1-2-4(7)8;/h2*1-2H,(H,5,6)(H,7,8);/q;;+2/p-2/b2*2-1-;

Upstream product

• 3105-55-3 sodium maleate 
• 110-17-8 (2E)-but-2-enedioic acid 

Relevant academic research and scientific papers

A comparative study on the thermal decomposition of some transition metal maleates and fumarates

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.

Transformation of maleato manganese(II): Temperature effect and coordination modes

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.