Neodymium (II) iodide

Crystal structure
	__ Nd 3+ __ I -
General
Surname	Neodymium (II) iodide
other names	Neodymium diiodide; Neodymium iodide (ambiguous);
Ratio formula	NdI 2
Brief description	dark purple to black solid
External identifiers / databases
EC number	622-142-8
ECHA InfoCard	100.150.931
PubChem	57351516
Wikidata	Q16854884
properties
Molar mass	398.05 g mol −1
Physical state	firmly
density	5.85 g cm −3
Melting point	562 ° C
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-317-319-335
	P: 261-280-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Neodymium (II) iodide is an inorganic chemical compound of neodymium from the group of iodides .

Extraction and presentation

Neodymium (II) iodide can be obtained by reducing neodymium (III) iodide with neodymium in a vacuum at 800 to 900 ° C.

{\ displaystyle \ mathrm {Nd + 2 \ NdI_ {3} \ longrightarrow 3 \ NdI_ {2}}}

It can also be represented by reacting neodymium with mercury (II) iodide .

{\ displaystyle \ mathrm {Nd + HgI_ {2} \ longrightarrow NdI_ {2} + Hg}}

Direct representation from iodine and neodymium is also possible.

{\ displaystyle \ mathrm {Nd + I_ {2} \ longrightarrow NdI_ {2}}}

The compound was first synthesized in 1961 by John D. Corbett.

properties

Neodymium (II) iodide is a dark purple to black solid. It is extremely hygroscopic and can only be stored and handled under carefully dried protective gas or in a high vacuum. In air, it changes into hydrates with moisture absorption , but these are unstable and more or less quickly transform into oxide iodides with the evolution of hydrogen. These processes take place much faster with water. The compound has a crystal structure of the strontium (II) bromide type. This transforms under pressure into the molybdenum disilicide structure typical of intermetallic compounds , which is already present in other rare earth diiodides ( e.g. for lanthanum diiodide ) under normal conditions. It forms complex compounds with tetrahydrofuran and other organic compounds.

use

Neodymium (II) iodide can be used as a reducing agent or catalyst in organic chemistry.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Georg Brauer , with the assistance of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1081 .
↑ AMERICAN ELEMENTS: Neodymium Iodide NdI2 , accessed May 2, 2014
↑ ^a ^b Datasheet Neodymium (II) iodide, anhydrous, powder, ≥99.9% trace metals basis from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).
^ Karl A. Jr. Gschneidner, Jean-Claude Bunzli, Vitalij K. Pecharsky: Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 247 ( limited preview in Google Book search).
↑ Angelika Jungmann, R. Claessen, R. Zimmermann, G. e. Meng, P. Steiner, S. Hüfner, S. Tratzky, K. Stöwe, HP Beck: Photoemission of LaI ₂ and CeI ₂ . In: Zeitschrift für Physik B Condensed Matter. 97, 1995, pp. 25-34, doi : 10.1007 / BF01317584 .
↑ Ralf Alsfasser, Erwin Riedel: Modern Inorganic Chemistry . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 188 ( limited preview in Google Book search).
↑ Mikhail N. Bochkarev, Igor L. Fedushkin, Sebastian Dechert, Anatolii A. Fagin, Herbert Schumann: [NdI ₂ (thf) ₅ ], the first crystallographically characterized neodymium (II) complex. In: Angewandte Chemie. 113, 2001, pp. 3268-3270, doi : 10.1002 / 1521-3757 (20010903) 113: 17 <3268 :: AID-ANGE3268> 3.0.CO; 2-K .
↑ GV Khoroshen kov, AA Fagin, MN Bochkarev, S. Dechert, H. Schumann: Reactions of neodymium (II), dysprosium (II), and thulium (II) diiodides with cyclopentadiene In: Russian Chemical Bulletin. 52, pp. 1715-1719, doi : 10.1023 / A: 1026132017155 .
↑ Anatolii A. Fagin, Tatyana V. Balashova, Dmitrii M. Kusyaev, Tatyana I. Kulikova, Tatyana A. Glukhova, Natalya P. Makarenko, Yurii A. Kurskii, William J. Evans, Mikhail N. Bochkarev: Reactions of neodymium ( II) iodide with organohalides. In: Polyhedron. 25, 2006, pp. 1105-1110, doi : 10.1016 / j.poly.2005.08.050 .
↑ Fundamental Chemistry: Neodymium Based Ziegler Catalysts . Springer, 2006, ISBN 3-540-34809-3 , pp. 13 ( limited preview in Google Book search).
↑ Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 261 ( limited preview in Google Book search).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f Georg Brauer , with the assistance of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1081 .

[AMERICAN_ELEMENTS-2] AMERICAN ELEMENTS: Neodymium Iodide NdI2 , accessed May 2, 2014

[Sigma-3] Datasheet Neodymium (II) iodide, anhydrous, powder, ≥99.9% trace metals basis from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).

[Gschneidner-4] Karl A. Jr. Gschneidner, Jean-Claude Bunzli, Vitalij K. Pecharsky: Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 247 ( limited preview in Google Book search).

[DOI10.1007/BF01317584-5] Angelika Jungmann, R. Claessen, R. Zimmermann, G. e. Meng, P. Steiner, S. Hüfner, S. Tratzky, K. Stöwe, HP Beck: Photoemission of LaI ₂ and CeI ₂ . In: Zeitschrift für Physik B Condensed Matter. 97, 1995, pp. 25-34, doi : 10.1007 / BF01317584 .

[Ralf_Alsfasser,_Erwin_Riedel-6] Ralf Alsfasser, Erwin Riedel: Modern Inorganic Chemistry . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 188 ( limited preview in Google Book search).

[DOI10.1002/1521-3757(20010903)-7] Mikhail N. Bochkarev, Igor L. Fedushkin, Sebastian Dechert, Anatolii A. Fagin, Herbert Schumann: [NdI ₂ (thf) ₅ ], the first crystallographically characterized neodymium (II) complex. In: Angewandte Chemie. 113, 2001, pp. 3268-3270, doi : 10.1002 / 1521-3757 (20010903) 113: 17 <3268 :: AID-ANGE3268> 3.0.CO; 2-K .

[DOI10.1023/A:1026132017155-8] GV Khoroshen kov, AA Fagin, MN Bochkarev, S. Dechert, H. Schumann: Reactions of neodymium (II), dysprosium (II), and thulium (II) diiodides with cyclopentadiene In: Russian Chemical Bulletin. 52, pp. 1715-1719, doi : 10.1023 / A: 1026132017155 .

[DOI10.1016/j.poly.2005.08.050-9] Anatolii A. Fagin, Tatyana V. Balashova, Dmitrii M. Kusyaev, Tatyana I. Kulikova, Tatyana A. Glukhova, Natalya P. Makarenko, Yurii A. Kurskii, William J. Evans, Mikhail N. Bochkarev: Reactions of neodymium ( II) iodide with organohalides. In: Polyhedron. 25, 2006, pp. 1105-1110, doi : 10.1016 / j.poly.2005.08.050 .

[Fundamental_Chemistry-10] Fundamental Chemistry: Neodymium Based Ziegler Catalysts . Springer, 2006, ISBN 3-540-34809-3 , pp. 13 ( limited preview in Google Book search).

[11] Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 261 ( limited preview in Google Book search).