Uranium (III) iodide

Crystal structure
	__ U 3+ __ I -
Crystal system	orthorhombic
Space group	Ccmm (No. 63, position 2)
Lattice parameters	a = 432.8 pm ; b = 1401.1 pm ; c = 1000.5 pm
General
Surname	Uranium (III) iodide
other names	Uranium triiodide
Ratio formula	UI 3
Brief description	black solid
External identifiers / databases
EC number	237-406-4
ECHA InfoCard	100.033.992
PubChem	83724
Wikidata	Q2499963
properties
Molar mass	618.74 g mol −1
Physical state	firmly
density	6.78 g cm −3
Melting point	766 ° C
Hazard and safety information
	; Radioactive
H and P phrases	H: 330-300-373-411
	P: ?
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Uranium (III) iodide is a chemical compound consisting of the elements uranium and iodine . It has the formula UI ₃ and belongs to the iodide class of substances .

presentation

Uranium (III) iodide can be obtained by reacting uranium and iodine.

{\ displaystyle {\ ce {2 U + 3 I2 -> 2 UI3}}}

properties

Uranium (III) iodide is a black solid that melts at 766 ° C. It crystallizes in the orthorhombic crystal system ( plutonium (III) bromide type) in the space group Ccmm (space group no.63 , position 2) with the lattice parameters a = 432.8 pm , b = 1401.1 pm and c = 1000, 5 pm and four formula units per unit cell . Uranium triiodide is suitable as a Lewis acid catalyst for various Diels-Alder reactions that are carried out under mild conditions. Template: room group / 63.2

Individual evidence

↑ ^a ^b ^c ^d ^e J. H. Levy, JC Taylor, PW Wilson: "The Structure of Uranium (III) Triiodide by Neutron Diffraction", in: Acta Cryst. B , 1975 , 31 , pp. 880-882 ( doi : 10.1107 / S0567740875003986 ).
^ ^A ^b ^c A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1969.
↑ Entry on uranium compounds in the GESTIS substance database of the IFA , accessed on February 1, 2016 (JavaScript required)
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry uranium compounds with the exception of those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) , accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling.
↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1218.
↑ Jacqueline Collin, Leonor Maria, Isabel Santos: “Uranium Iodides as Catalysts for Diels – Alder Reactions”, in: Journal of Molecular Catalysis A: Chemical , 2000 , 160 (2), pp. 263-267 ( doi : 10.1016 / S1381 -1169 (00) 00257-0 ).

literature

Ingmar Grenthe, Janusz Drożdżynński, Takeo Fujino, Edgar C. Buck, Thomas E. Albrecht-Schmitt, Stephen F. Wolf: Uranium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 253-698 ( doi : 10.1007 / 1-4020-3598-5_5 ).

[Structure-1] J. H. Levy, JC Taylor, PW Wilson: "The Structure of Uranium (III) Triiodide by Neutron Diffraction", in: Acta Cryst. B , 1975 , 31 , pp. 880-882 ( doi : 10.1107 / S0567740875003986 ).

[HOWI_1969-2] A ^b ^c A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1969.

[GESTIS-3] Entry on uranium compounds in the GESTIS substance database of the IFA , accessed on February 1, 2016 (JavaScript required)

[CLP_100.240.790-4] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry uranium compounds with the exception of those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) , accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[5] The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling.

[brauer-6] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1218.

[7] Jacqueline Collin, Leonor Maria, Isabel Santos: “Uranium Iodides as Catalysts for Diels – Alder Reactions”, in: Journal of Molecular Catalysis A: Chemical , 2000 , 160 (2), pp. 263-267 ( doi : 10.1016 / S1381 -1169 (00) 00257-0 ).