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Praseodymium acetate

Names
IUPAC names Tetra-μ-acetatodiaquadipraseodymium(III) praseodymium (3+) triacetate
Other names Praseodymium ethanoate
Identifiers
CAS Number	6192-12-7
3D model (JSmol)	Interactive image
ChEBI	CHEBI:63078
ChemSpider	145010
ECHA InfoCard	100.025.676
EC Number	228-242-4
PubChem CID	165418
CompTox Dashboard (EPA)	DTXSID50890615
InChI InChI=1S/3C2H4O2.Pr/c3*1-2(3)4;/h3*1H3,(H,3,4);/q;;;+3/p-3Key: KPXRPRLCONABEG-UHFFFAOYSA-K
SMILES .O=C()C.C(=O)C.C(=O)C
Properties
Chemical formula	Pr(O2C2H3)3
Appearance	Green solid
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	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 , 100 kPa). N verify (what is  ?) Infobox references

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.

Preparation

Praseodymium(III) acetate can be formed by the reaction of acetic acid and praseodymium(III) oxide:

${\displaystyle {\mathsf {6CH_{3}COOH+Pr_{2}O_{3}\ \xrightarrow {T} \ 2Pr(CH_{3}COO)_{3}+3H_{2}O}}}$

Praseodymium(III) carbonate and praseodymium(III) hydroxide can also be used:

${\displaystyle {\mathsf {6CH_{3}COOH+Pr_{2}(CO_{3})_{3}\ \xrightarrow {T} \ 2Pr(CH_{3}COO)_{3}+3H_{2}O+3CO_{2}}}}$↑

${\displaystyle {\mathsf {6CH_{3}COOH+2Pr(OH)_{3}\ \xrightarrow {T} \ 2Pr(CH_{3}COO)_{3}+6H_{2}O}}}$

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.

Decomposition

When the dihydrate is heated, it decomposes to the anhydrous, which then decomposes into praseodymium(III) oxyacetate(PrO(O₂C₂H₃)) then to praseodymium(III) oxycarbonate, and at last to praseodymium(III) oxide.

See also

• Neodymium acetate
• Praseodymium
• Acetic acid
• Lanthanide

References

1. "Praseodymium(3+) acetate". pubchem.ncbi.nlm.nih.gov. Retrieved 30 March 2022.
2. ^ Nakata, Kazuaki; Hiroo, Katsu; Takagi, Yoshito (1996). "Crystal Structures of Intermediate Products Appearing on the Way of Thermal Decomposition of Praseodymium (III) Acetate Dihydrate by X-ray Powder Diffraction". Bulletin of Osaka Kyoiku University Division III: Natural Sciences. 44 (2). Osaka Kyoiku University: 153–162. ISSN 0373-7411.
3. Hall, L. C.; Flanigan, D. A. (Dec 1, 1963). "Polarography of Lanthanum(III), Praseodymium(III), and Ytterbium(III) in Anhydrous Ethylenediamine". Analytical Chemistry. 35 (13). American Chemical Society (ACS): 2108–2112. doi:10.1021/ac60206a036. ISSN 0003-2700.
4. Lossin, Adalbert; Meyer, Gerd (1994). "Pr(CH₃COO)₃, ein wasserfreies Selten-Erd-Acetat mit Netzwerkstruktur". Zeitschrift für Anorganische und Allgemeine Chemie. 620 (3). doi:10.1002/zaac.19946200306.

• Praseodymium(III) compounds
• Acetates
• Electron microscopy stains