Praseodymium(III) iodide

Praseodymium(III) iodide
Names
	Other names Praseodymium triiodide
Identifiers
CAS Number	13813-23-5 ;
3D model (JSmol)	Interactive image ;
ChemSpider	75566 ;
ECHA InfoCard	100.034.046
EC Number	237-466-1;
PubChem CID	83744 ;
CompTox Dashboard (EPA)	DTXSID5065641 ;
	InChI InChI=1S/3HI.Pr/h3*1H;/q;;;+3/p-3 Key: PVEVRIVGNKNWML-UHFFFAOYSA-K;
	SMILES I[Pr](I)I;
Properties
Chemical formula	PrI3
Molar mass	521.619 g/mol; 683.75652 g/mol (nonahydrate)
Appearance	hygroscopic green crystals
Density	5.8 g/cm3
Melting point	738 °C (1,360 °F; 1,011 K)
Boiling point	1,380 °C (2,520 °F; 1,650 K)
Solubility in water	213.9 g/100 mL
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H317, H360
Precautionary statements	P203, P261, P272, P280, P302+P352, P318, P321, P333+P313, P362+P364, P405, P501
Related compounds
Other anions	Praseodymium(III) fluoride ; Praseodymium(III) chloride ; Praseodymium(III) bromide
Other cations	Cerium(III) iodide ; Neodymium(III) iodide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Last updated November 22, 2023

Praseodymium(III) iodide is an inorganic salt, consisting of the rare-earth metal praseodymium and iodine, with the chemical formula PrI₃. It forms green crystals.^[4] It is soluble in water.^[5]

Preparation

Heating praseodymium and iodine in an inert atmosphere produces praseodymium(III) iodide:^[1]

{\mathsf {2Pr+3I_{2}\ \xrightarrow {T} \ 2PrI_{3}}}

It can also be obtained by heating praseodymium with mercury(II) iodide:^[6]

{\mathsf {2Pr+3HgI_{2}\ \xrightarrow {T} \ 2PrI_{3}+3Hg}}

Properties

Praseodymium(III) iodide forms green crystals, which are soluble in water.^[5] It forms orthorhombic crystals which are hygroscopic.^[1] It crystallizes in the PuBr₃ type^[6]^[7] with space group Cmcm (No. 63) with a = 4.3281(6) Å, b = 14.003(6) Å and c = 9.988(3) Å.^[8] It decomposes through an intermediate phase 2 PrI₃·PrOI to a mixture of praseodymium oxyiodide and praseodymium oxide (5 PrOI·Pr₂O₃).^[9]

Reactions

PrI₃ forms compounds with hydrazine, like I₃Pr·3N₂H₄·4H₂O which has pale yellow crystals and soluble in methanol, slightly soluble in water, and insoluble in benzene, d_{20 °C} = 2.986 g/cm³.^[10]

PrI₃ forms compounds with urea, like I₃Pr·5CO(NH₂)₂ which has pale green crystals.^[11]

PrI₃ forms compounds with thiourea, like I₃Pr·2CS(NH₂)₂·9H₂O which is a green crystal with d = 2.27 g/cm³.^[5]^[12]

Praseodymium(III) iodide forms a nonahydrate, PrI₃·9H₂O. It can be obtained by dissolving praseodymium(III) oxide in concentrated aqueous hydroiodic acid:

Pr₂O₃ + 6 HI + 15H₂O → 2 PrI₃·9H₂O

It adopts the same structure as other light rare earth iodides (La–Ho) and contains a triangular tricapped prismatic nonaaqua ion [Pr(OH₂)₉]³⁺ and iodide counterions.^[4]

Praseodymium(III) iodide reacts with praseodymium metal at elevated temperatures to form praseodymium diiodide:^[13]

2 PrI₃ + Pr → 3 PrI₂

Related Research Articles

<span class="mw-page-title-main">Praseodymium(III) chloride</span> Chemical compound

Praseodymium(III) chloride is the inorganic compound with the formula PrCl₃. Like other lanthanide trichlorides, it exists both in the anhydrous and hydrated forms. It is a blue-green solid that rapidly absorbs water on exposure to moist air to form a light green heptahydrate.

<span class="mw-page-title-main">Californium compounds</span>

Few compounds of californium have been made and studied. The only californium ion that is stable in aqueous solutions is the californium(III) cation. The other two oxidation states are IV (strong oxidizing agents) and II (strong reducing agents). The element forms a water-soluble chloride, nitrate, perchlorate, and sulfate and is precipitated as a fluoride, oxalate or hydroxide. If problems of availability of the element could be overcome, then CfBr₂ and CfI₂ would likely be stable.

<span class="mw-page-title-main">Chromium(III) iodide</span> Chemical compound

Chromium(III) iodide, also known as chromium triiodide, is an inorganic compound with the formula CrI₃. It is a black solid that is used to prepare other chromium iodides.

Americium(III) iodide or americium triiodide is the chemical compound composed of americium and iodine with the formula AmI₃.

Cerium(III) iodide (CeI₃) is the compound formed by cerium(III) cations and iodide anions.

Praseodymium(III) oxalate is an inorganic compound, a salt of praseodymium metal and oxalic acid with the chemical formula C₆O₁₂Pr₂. The compound forms light green crystals, insoluble in water, also forms crystalline hydrates.

Praseodymium(III) nitride is a binary inorganic compound of praseodymium and nitrogen. Its chemical formula is PrN. The compound forms black crystals, and reacts with water.

Praseodymium(IV) fluoride (also praseodymium tetrafluoride) is a binary inorganic compound, a highly oxidised metal salt of praseodymium and fluoride with the chemical formula PrF₄.

<span class="mw-page-title-main">Indium(III) iodide</span> Chemical compound

Indium(III) iodide or indium triiodide is a chemical compound of indium and iodine with the formula InI₃.

Samarium(III) iodide is an inorganic compound, a salt of samarium and hydroiodic acid with the chemical formula SmI^₃.

Chromium(III) perchlorate is an inorganic compound, a salt with the chemical formula Cr(ClO₄)₃. It's hexahydrate Cr(ClO₄)₃·6H₂O is a cyan solid that dissolves in water.

Neodymium(III) iodide is an inorganic salt of iodine and neodymium with the formula NdI₃. Neodymium uses the +3 oxidation state in the compound. The anhydrous compound is a green powdery solid at room temperature.

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.

Praseodymium compounds are compounds formed by the lanthanide metal praseodymium (Pr). In these compounds, praseodymium generally exhibits the +3 oxidation state, such as PrCl₃, Pr(NO₃)₃ and Pr(CH₃COO)₃. However, compounds with praseodymium in the +2 and +4 oxidation states, and unlike other lanthanides, the +5 oxidation state, are also known.

<span class="mw-page-title-main">Praseodymium diiodide</span> Chemical compound

Praseodymium diiodide is a chemical compound with the empirical formula of PrI₂, consisting of praseodymium and iodine. It is an electride, with the ionic formula of Pr³⁺(I⁻)₂e⁻, and therefore not a true praseodymium(II) compound.

Lanthanum(III) iodide is an inorganic compound containing lanthanum and iodine with the chemical formula LaI^₃.

Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI₃.

Praseodymium iodide may refer to:

Dysprosium(III) iodide is a binary inorganic compound of dysprosium and iodine with the chemical formula DyI^₃.

<span class="mw-page-title-main">Rhenium(III) iodide</span> Chemical compound

Rhenium(III) iodide is a binary chemical compound of rhenium and iodide with the chemical formula ReI^₃.

References

1 2 3 4 Haynes, William M. (2016-06-22). CRC Handbook of Chemistry and Physics. CRC Press. pp. 2016–2652. ISBN 978-1-4987-5429-3.
↑ Solubility_Table_Zh.PDF_version.pdf
↑ "Praseodymium triiodide". pubchem.ncbi.nlm.nih.gov.
1 2 Timofte, T.; Babai, A.; Meyer, G.; Mudring, A.-V. (2005). "Praseodymium triiodide nonahydrate". Acta Crystallogr. E . 61 (6): i94–i95. Bibcode:2005AcCrE..61I..94T. doi:10.1107/S1600536805012857.
1 2 3 "Solubility_Table_Zh" (PDF). 27 August 2016.
1 2 Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964). "Preparation and Crystal Data for Lanthanide and Actinide Triiodides". Inorg. Chem. 3 (8): 1137–1141. doi:10.1021/ic50018a015.
↑ Wells, A. F. (1984). Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 421. ISBN 978-0-19-965763-6.
↑ E. Warkentin, H. Bärnighausen (1979), "Die Kristallstruktur von Praseodymdiiodid (Modifikation V)", Zeitschrift für anorganische und allgemeine Chemie (in German), vol. 459, no. 1, pp. 187–200, doi:10.1002/zaac.19794590120
↑ Heiniö, Outi; Leskelä, Markku; Niinistö, Lauri; Tuhtar, Dinko; Sjöblom, Johan; Strand, T. G.; Sukhoverkhov, V. F. (1980). "Structural and Thermal Properties of Rare Earth Triiodide Hydrates". Acta Chemica Scandinavica. 34a: 207–211. doi: 10.3891/acta.chem.scand.34a-0207 . ISSN 0904-213X.
↑ Uchenye zapiski: Serii︠a︡ khimicheskikh nauk (S.M. Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1977), trang 37. Truy cập 1 tháng 1 năm 2021.
↑ Russian Journal of Inorganic Chemistry, Tập 18,Phần 2 (British Library Lending Division with the cooperation of the Royal Society of Chemistry, 1973), trang 1655. Truy cập 1 tháng 1 năm 2021.
↑ Villars, Pierre; Cenzual, Karin; Gladyshevskii, Roman (24 July 2017). Handbook of Inorganic Substances 2017. Walter de Gruyter GmbH & Co KG. p. 5090. ISBN 978-3-11-043655-6.
↑ Gerlitzki, Niels; Meyer, Gerd; Mudring, Anja-Verena; Corbett, John D. (2004). "Praseodymium diiodide, PrI₂, revisited by synthesis, structure determination and theory". J. Alloys Compd. Elsevier BV. 380 (1–2): 211–218. doi:10.1016/j.jallcom.2004.03.046. ISSN 0925-8388.

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[crc-1] 1 2 3 4 Haynes, William M. (2016-06-22). CRC Handbook of Chemistry and Physics. CRC Press. pp. 2016–2652. ISBN 978-1-4987-5429-3.

[2] Solubility_Table_Zh.PDF_version.pdf

[3] "Praseodymium triiodide". pubchem.ncbi.nlm.nih.gov.

[Timofte-4] 1 2 Timofte, T.; Babai, A.; Meyer, G.; Mudring, A.-V. (2005). "Praseodymium triiodide nonahydrate". Acta Crystallogr. E . 61 (6): i94–i95. Bibcode:2005AcCrE..61I..94T. doi:10.1107/S1600536805012857.

[:0-5] 1 2 3 "Solubility_Table_Zh" (PDF). 27 August 2016.

[AspreyKeenanKruse-6] 1 2 Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964). "Preparation and Crystal Data for Lanthanide and Actinide Triiodides". Inorg. Chem. 3 (8): 1137–1141. doi:10.1021/ic50018a015.

[7] Wells, A. F. (1984). Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 421. ISBN 978-0-19-965763-6.

[8] E. Warkentin, H. Bärnighausen (1979), "Die Kristallstruktur von Praseodymdiiodid (Modifikation V)", Zeitschrift für anorganische und allgemeine Chemie (in German), vol. 459, no. 1, pp. 187–200, doi:10.1002/zaac.19794590120

[9] Heiniö, Outi; Leskelä, Markku; Niinistö, Lauri; Tuhtar, Dinko; Sjöblom, Johan; Strand, T. G.; Sukhoverkhov, V. F. (1980). "Structural and Thermal Properties of Rare Earth Triiodide Hydrates". Acta Chemica Scandinavica. 34a: 207–211. doi: 10.3891/acta.chem.scand.34a-0207 . ISSN 0904-213X.

[10] Uchenye zapiski: Serii︠a︡ khimicheskikh nauk (S.M. Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1977), trang 37. Truy cập 1 tháng 1 năm 2021.

[11] Russian Journal of Inorganic Chemistry, Tập 18,Phần 2 (British Library Lending Division with the cooperation of the Royal Society of Chemistry, 1973), trang 1655. Truy cập 1 tháng 1 năm 2021.

[12] Villars, Pierre; Cenzual, Karin; Gladyshevskii, Roman (24 July 2017). Handbook of Inorganic Substances 2017. Walter de Gruyter GmbH & Co KG. p. 5090. ISBN 978-3-11-043655-6.

[Gerlitzki-13] Gerlitzki, Niels; Meyer, Gerd; Mudring, Anja-Verena; Corbett, John D. (2004). "Praseodymium diiodide, PrI₂, revisited by synthesis, structure determination and theory". J. Alloys Compd. Elsevier BV. 380 (1–2): 211–218. doi:10.1016/j.jallcom.2004.03.046. ISSN 0925-8388.

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