Neptunium tetrachloride

From Wikipedia, the free encyclopedia

Neptunium tetrachloride
Identifiers

CAS Number	15597-84-9^Y
3D model (JSmol)	Interactive image
InChI InChI=1S/4ClH.Np/h4*1H;/q;;;;+4/p-4 Key: XFAAJSLPXNXKKA-UHFFFAOYSA-J
SMILES [Np+4].[Cl-].[Cl-].[Cl-].[Cl-]
Properties
Chemical formula	Cl₄Np
Molar mass	379 g·mol⁻¹
Appearance	orange-brown crystals
Density	4.95 g/cm³
Melting point	538 °C (1,000 °F; 811 K)
Related compounds
Related compounds	Uranium tetrachloride, Thorium tetrachloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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 by:

2 NpN + 8 HCl → N₂ + 4 H₂ + 2 NpCl₄

Np₂S₃ + 8 HCl → 2 NpCl₄ + 3 H₂S + H₂

the 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]

NpCl₄ crystallizes in tetragonal crystal system of space group I4/amd.^[6]

The compound reacts with ammonia to produce neptunium trichloride:^[3]

6 NpCl₄ + 2 NH₃ → 6 NpCl₃ + 6 HCl + N₂

Neptunium tetrachloride can be reduced to neptunium trichloride by hydrogen at 450 °C.

2 NpCl₄ + H₂ → 2 NpCl₃ + 2HCl

Np(III)

Np(IV)

Organoneptunium(IV) compounds	Np(C₂O₄)₂ Np(C₈H₈)₂

Np(V)

Np(VI)

Np(VII)

Hidden categories:

v t e Chlorine compounds
Chlorides and acids	HCl HClO HClO₂ HClO₃ HClO₄ HSO₃Cl BaClF BCl₃ CCl₄ SiCl₄ TiCl₄ C₃H₅Cl
Chlorine fluorides	ClF ClF₃ ClF₅
Chlorine oxides	ClO ClO₂ Cl₂O Cl₂O₂ Cl₂O₃ Cl₂O₄ Cl₂O₅ Cl₂O₆ Cl₂O₇ ClO₄
Chlorine oxyfluorides	ClOF ClOF₃ ClO₂F ClOF₅ (predicted) ClO₂F₃ ClO₃F
Chlorine(I) derivatives	ClNO₃ ClSO₃F ClN₃ Cl₃N