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Oxalate (systematic IUPAC name: ethanedioate) is an anion with the chemical formula C 2 O 2− 4.This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (Na 2 C 2 O 4), and several esters such as dimethyl oxalate ((CH 3) 2 C 2 O 4).
Like other iron oxalates, ferrous oxalates feature octahedral Fe centers. The dihydrate FeC 2 O 4 (H 2 O) x is a coordination polymer, consisting of chains of oxalate-bridged ferrous centers, each with two aquo ligands. [3] When heated to 120 °C, the dihydrate dehydrates, and the anhydrous ferrous oxalate decomposes near 190 °C. [4]
The molecular formula C 2 O 4 (molar mass: 88.02 g/mol) may refer to: Oxalate (ethanedioate) Dioxetanediones: 1,2-Dioxetanedione (1,2-dioxetane-3,4-dione)
EC Number: 205-634-3; ... C 2 H 2 O 4: Molar mass: ... Oxalic acid is mainly manufactured by the oxidation of carbohydrates or glucose using nitric acid or air in the ...
Sodium oxalate starts to decompose above 290 °C into sodium carbonate and carbon monoxide: [2]. Na 2 C 2 O 4 → Na 2 CO 3 + CO. When heated at between 200 and 525°C with vanadium pentoxide in a 1:2 molar ratio, the above reaction is suppressed, yielding instead a sodium vanadium oxibronze with release of carbon dioxide [6]
It often occurs as the trihydrate K 3 [Fe(C 2 O 4) 3]·3H 2 O. Both are crystalline compounds, lime green in colour. [4] The compound is a salt consisting of ferrioxalate anions, [Fe(C 2 O 4) 3] 3−, and potassium cations K +. The anion is a transition metal oxalate complex consisting of an iron atom in the +3 oxidation state and three ...
Forms crystalline hydrates of the composition MnC 2 O 4 •n H 2 O, where n = 2 and 3. [ 6 ] Crystalline hydrate of the composition MnC 2 O 4 •2H 2 O forms light pink crystals of the orthorhombic system , space group P 2 1 2 1 2 1 , cell parameters a = 0.6262 nm, b = 1.3585 nm, c = 0.6091 nm, Z = 4, melts in its own crystallization water at ...
Ferrioxalate or trisoxalatoferrate(III) is a trivalent anion with formula [Fe(C 2 O 4) 3] 3−. It is a transition metal complex consisting of an iron atom in the +3 oxidation state and three bidentate oxalate ions C 2 O 2− 4 anions acting as ligands. The ferrioxalate anion gives a lime green color to salts, and in solution it is fluorescent.