Rhenium (III) chloride

Crystal structure
__ Re 3+      __ Cl -
Crystal system	trigonal
Space group	R 3 m
Lattice parameters	a = 1033 pm, c = 2036 pm
General
Surname	Rhenium (III) chloride
other names	Rhenium trichloride Trirhenium (III) nonachloride
Ratio formula	ReCl 3
Brief description	dark red solid
External identifiers / databases
CAS number 13569-63-6 EC number 236-987-1 ECHA InfoCard 100.033.610 PubChem 83581 ChemSpider 75411 Wikidata Q2452855
properties
Molar mass	292.57 g mol −1
Physical state	firmly
density	4.66 g cm −3
Melting point	500 ° C (decomposition)
Sublimation point	450 ° C
solubility	Hydrolysis in water soluble in acetone, ethanol and concentrated hydrochloric acid
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-305 + 351 + 338
Toxicological data	280 mg kg −1 ( LD 50 ,  mouse ,  ip )
Thermodynamic properties
ΔH f 0	−264 kJ mol −1
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Rhenium (III) chloride is an inorganic chemical compound of rhenium from the group of chlorides . It was discovered in 1932 by Wilhelm Biltz , Wilhelm Geilmann and Friedrich Wilhelm Wrigge .

Extraction and presentation

Rhenium (III) chloride can be obtained by thermal decomposition of rhenium (V) chloride .

${\displaystyle {\ce {3ReCl5 -> Re3Cl9 + 3Cl2 ^}}}$

It can also be produced by reacting rhenium (V) chloride with tin (II) chloride at 250 ° C. It is produced in high yield by the reaction of Re ₂ (CH ₃ CO ₂ ) ₄ Cl ₂ with dry hydrogen chloride at 340 ° C.

properties

Rhenium (III) chloride is a dark red paramagnetic solid. Persistent for some time in normal humid air, hydrolysis takes place in water (solution initially red) and bases . It is soluble in acetone , methanol and ethanol , concentrated hydrochloric acid , glacial acetic acid, dimethyl sulfone and sulfolane (tetrahydrothiophene sulfone ) without decomposition, forming deep red solutions . It is soluble in hydrochloric acid with the formation of [Re ₃ Cl ₁₂ ] ³⁻ and similar forms. It reacts with oxygen at 400 ° C to Rheniumoxidchloriden is of hydrogen is reduced at 250-300 ° C for metal, and decomposes at temperatures above 360 ° C in rhenium and chlorine . The green vapor mainly contains Re ₃ Cl ₉ molecules. In the solid state it has a trigonal crystal structure with the space group R 3 m (space group no. 160) and a = 1033 pm and c = 2036 pm. The crystal structure consists of Re ₃ Cl ₉ units, which are each linked to three other Re ₃ Cl ₉ groups via two chlorine bridges .

Individual evidence

1. ↑ ^{a b c d e f} data sheet Rhenium (III) chloride from Sigma-Aldrich , accessed on May 25, 2017 ( PDF ).
2. ↑ ^{a b c d} Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1612.
3. ↑ ^{a b} A. F. Holleman , N. Wiberg : Inorganische Chemie . 103rd edition. Volume 2: Subgroup elements, lanthanoids, actinides, transactinides. Walter de Gruyter, Berlin / Boston 2016, ISBN 978-3-11-049590-4 , p. 1921 (Reading sample: Part C - Subgroup elements. Google book search ).
4. ↑ ^{a b c} H. Gehrke, Jr. and D. Bue: Nonachlorotrirhenium (III) . In: Robert W. Parry (Ed.): Inorganic Syntheses . tape 12 . McGraw-Hill Book Company, Inc., 1970, ISBN   07-048517-8  ( defective ) , p. 193-196 (English).
5. ↑ Wilhelm Biltz, Wilhelm Geilmann and Friedrich Wilhelm Wrigge, rhenium trichloride ( Memento of the original from January 13, 2017 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Nachrichten von der Gesellschaft der Wissenschaften zu Göttingen, 1932, pp. 579-587