Ammonium perrhenate

Crystal structure
	__ N 3− __ H + __ Re 7+ __ O 2−
Space group	I 4 1 / a (No. 88)
General
Surname	Ammonium perrhenate
other names	Metaperrhenic acid ammonium salt; Standard rhenium solution;
Ratio formula	NH 4 ReO 4
Brief description	white solid
External identifiers / databases
EC number	237-075-6
ECHA InfoCard	100.033.690
PubChem	3084163
ChemSpider	2341271
Wikidata	Q778163
properties
Molar mass	268.24 g mol −1
Physical state	firmly
density	3.97 g cm −3 (25 ° C)
Melting point	Decomposition from 200 ° C
solubility	slightly soluble in water 2.89 g / 100 ml at 0 ° C; 6.2 g / 100 ml at 20 ° C; 32.34 g / 100 ml at 80 ° C;
safety instructions
H and P phrases	H: 272-319-315-335
	P: 220-261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ammonium perrhenate is an inorganic chemical compound from the group of perrhenates .

Extraction and presentation

Ammonium perrhenate can be obtained by reacting a perrhenic acid solution with ammonia .

{\ displaystyle \ mathrm {NH_ {3} + HReO_ {4} \ longrightarrow NH_ {4} ReO_ {4}}}

properties

Ammonium perrhenate is a white solid that is sparingly soluble in water. It decomposes at 400 ° C into rhenium (IV) oxide , water and nitrogen . It has a tetragonal crystal structure of the Scheelite type with the space group I 4 ₁ / a (space group no. 88) and the lattice parameters a = 587.1 pm and c = 1294.2 pm. Template: room group / 88

use

The rhenium (III) organohydrazides formed when ammonium perrhenate is reduced with 2-hydrazinopyridine and triphenylphosphine are potential radiopharmaceuticals.

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet Ammonium perrhenate, 99.999% trace metals basis from Sigma-Aldrich , accessed on August 2, 2013 ( PDF ).
↑ ^a ^b ^c Georg Brauer: Ammonium perrhenate . In: Handbook of Preparative Inorganic Chemistry . Ferdinand Enke Verlag, Stuttgart 1954, p. 1108 .
↑ ^a ^b O. Glemser: Ammonium Perrhenate . In: Handbook of Preparative Inorganic Chemistry , 2nd Ed. Edited by G. Brauer, Academic Press, 1963, New York. Volume 1, pp. 1484-1485.
↑ ^a ^b Entry on ammonium perrhenate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
↑ ^a ^b Georg Brauer: Handbook of preparative inorganic chemistry . 3., reworked. Edition. tape III . Enke, Stuttgart 1981, ISBN 3-432-87823-0 , pp. 1633 .

[Sigma-1] ↑ ^a ^b ^c ^d ^e data sheet Ammonium perrhenate, 99.999% trace metals basis from Sigma-Aldrich , accessed on August 2, 2013 ( PDF ).

[Brauer-2] Georg Brauer: Ammonium perrhenate . In: Handbook of Preparative Inorganic Chemistry . Ferdinand Enke Verlag, Stuttgart 1954, p. 1108 .

[Glemser-3] O. Glemser: Ammonium Perrhenate . In: Handbook of Preparative Inorganic Chemistry , 2nd Ed. Edited by G. Brauer, Academic Press, 1963, New York. Volume 1, pp. 1484-1485.

[GESTIS-4] Entry on ammonium perrhenate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .

[brauer-5] Georg Brauer: Handbook of preparative inorganic chemistry . 3., reworked. Edition. tape III . Enke, Stuttgart 1981, ISBN 3-432-87823-0 , pp. 1633 .