From Wikipedia, the free encyclopedia
Chemical compound
Neptunium tetrachloride is a binary
inorganic compound of
neptunium metal and
chlorine with the chemical formula NpCl4 .
[1]
[2]
Synthesis
The compound can be prepared from the reaction of
neptunium mononidride with
HCl :
[3]
2NpN + 8HCl → N2 + 4H2 + 2NpCl4
Also, reaction of neptunium sulphide with HCl:
Np2 S3 + 8HCl → 2NpCl4 + 3H2 S + H2
Reaction of
carbon tetrachloride with
neptunium(IV) oxide or NpO2 . Neptunium tetrachloride is formed as a yellow sublimate.
[4]
NpO2 + CCl4 → NpCl4 + CO2
Other reactions are also used.
[5]
Physical properties
NpCl4 crystallizes in
tetragonal crystal system of space group I4/amd .
[6]
Chemical properties
The compound reacts with
ammonia to produce
neptunium trichloride :
[3]
6NpCl4 + 2NH3 → 6NpCl3 + 6HCl + N2
Neptunium tetrachloride can be reduced to neptunium trichloride by hydrogen at 450 °C.
2NpCl4 + H2 → 2NpCl3 + 2HCl
References
^
"WebElements Periodic Table » Neptunium » neptunium tetrachloride" . webelements.com. Retrieved 1 April 2024 .
^ Stone, J. A.; Jones, E. R. (15 February 1971).
"Mössbauer Spectra and Magnetic Susceptibility of Neptunium Tetrachloride below 85°K" .
The Journal of Chemical Physics . 54 (4): 1713–1718.
doi :
10.1063/1.1675076 . Retrieved 1 April 2024 .
^
a
b Sheft, Irving; Fried, Sherman (1950).
New Neptunium Compounds . U.S. Atomic Energy Commission, Technical Information Division. p. 5. Retrieved 1 April 2024 .
^ Fried, S. (1947).
The Basic Dry Chemistry of Neptunium .
Atomic Energy Commission . p. 1. Retrieved 1 April 2024 .
^ Ahrland, S.; Bagnall, K. W.; Brown, D. (7 June 2016).
The Chemistry of the Actinides: Comprehensive Inorganic Chemistry .
Elsevier . p. 181.
ISBN
978-1-4831-5934-8 . Retrieved 1 April 2024 .
^ Spirlet, Marie-Rose; Jemine, Xavier; Goffart, Jean (1 January 1995).
"A single-crystal X-ray structure determination of neptunium tetrachloride" .
Journal of Alloys and Compounds . 216 (2): 269–271.
doi :
10.1016/0925-8388(94)01264-I .
ISSN
0925-8388 . Retrieved 1 April 2024 .
Np(III) Np(IV) Organoneptunium(IV) compounds
Np(V) Np(VI) Np(VII)