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Praseodymium(III) acetate

Compound of praseodymium From Wikipedia, the free encyclopedia

Praseodymium(III) acetate is an inorganic salt composed of a Praseodymium atom trication and three acetate groups as anions. This compound commonly forms the dihydrate, Pr(O2C2H3)3·2H2O.[2]

Quick facts Names, Identifiers ...
Praseodymium acetate
Neodymium acetate
Neodymium acetate
Names
IUPAC names
Tetra-μ2-acetatodiaquadipraseodymium(III) praseodymium (3+) triacetate
Other names
Praseodymium ethanoate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.025.676 Edit this at Wikidata
EC Number
  • 228-242-4
  • InChI=1S/3C2H4O2.Pr/c3*1-2(3)4;/h3*1H3,(H,3,4);/q;;;+3/p-3
    Key: KPXRPRLCONABEG-UHFFFAOYSA-K
  • [Pr+3].O=C([O-])C.[O-]C(=O)C.[O-]C(=O)C
Properties
Pr(O2C2H3)3
Appearance Green solid
Hazards
GHS labelling:[1]
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

Praseodymium(III) acetate can be formed by the reaction of acetic acid and praseodymium(III) oxide at elevated temperatures:[3]

6 CH3COOH + Pr2O3 → 2 Pr(CH3COO)3 + 3 H2O

Structure

According to X-ray crystallography, anhydrous praseodymium acetate is a coordination polymer. Each Pr(III) center is nine-coordinate, with two bidentate acetate ligands and the remaining sites occupied by oxygens provided by bridging acetate ligands. The lanthanum and holmium compounds are isostructural.[4]

Decomposition

When the dihydrate is heated, it decomposes to the anhydrous form, which then decomposes into praseodymium(III) oxyacetate (PrO(CH3COO)) then to praseodymium(III) oxycarbonate, and at last to praseodymium(III) oxide.[2]

See also

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