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FeCl 3 + Fe 2 O 3 → 3FeOCl. Alkali metal alkoxides react to give the iron(III) alkoxide complexes. These products have more complicated structures than anhydrous iron(III) chloride. [22] [23] In the solid phase a variety of multinuclear complexes have been described for the nominal stoichiometric reaction between FeCl 3 and sodium ethoxide:
Potassium ferrioxalate contains the iron(III) complex [Fe(C 2 O 4) 3] 3−. In chemistry, iron(III) or ferric refers to the element iron in its +3 oxidation state. Ferric chloride is an alternative name for iron(III) chloride (FeCl 3). The adjective ferrous is used instead for iron(II) salts, containing the cation Fe 2+.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
An alternative synthesis of anhydrous ferrous chloride is the reduction of FeCl 3 with chlorobenzene: [5] 2 FeCl 3 + C 6 H 5 Cl → 2 FeCl 2 + C 6 H 4 Cl 2 + HCl. For the preparation of ferrocene ferrous chloride is generated in situ by comproportionation of FeCl 3 with iron powder in tetrahydrofuran (THF). [6]
FeCl 3 + 3 HF → FeF 3 + 3 HCl. It also forms as a passivating film upon contact between iron (and steel) and hydrogen fluoride. [8] The hydrates crystallize from aqueous hydrofluoric acid. [6] The material is a fluoride acceptor. With xenon hexafluoride it forms [FeF 4][XeF 5]. [4] Pure FeF 3 is not yet known among minerals.
FeOCl is prepared by heating iron(III) oxide with ferric chloride at 370 °C (698 °F) over the course of several days: [2]. Fe 2 O 3 + FeCl 3 → 3 FeOCl. Alternatively, FeOCl may be prepared by the thermal decomposition of FeCl 3 ⋅6H 2 O at 220 °C (428 °F) over the course of one hour: [3]
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Ferric oxalate, also known as iron(III) oxalate, refers to inorganic compounds with the formula Fe 2 (C 2 O 4) 3 (H 2 O) x but could also refer to salts of [Fe(C 2 O 4) 3] 3-. Fe 2 (C 2 O 4) 3 (H 2 O) x are coordination polymers with varying degrees of hydration. The coordination complex with the formula [Fe(C 2 O 4) 3] 3-forms a variety of ...