Neptunium(V) fluorida

Neptunium(V) fluorida
Nama
Nama IUPAC Neptunium(V) fluorida
Nama lain Neptunium pentafluorida
Penanda
Nomor CAS	31479-18-2
Model 3D (JSmol)	Gambar interaktif
3DMet	{{{3DMet}}}
Nomor EC
Nomor RTECS	{{{value}}}
CompTox Dashboard (EPA)	DTXSID701312633
InChI InChI=1S/5FH.Np/h5*1H;/q;;;;;+5/p-5 Key: QROYIGAVOZBRHJ-UHFFFAOYSA-I
SMILES F[Np](F)(F)(F)F
Sifat
Rumus kimia	NpF₅
Massa molar	332 g/mol
Penampilan	Padatan putih kebiruan^[1]
Titik lebur	318 °C ^[1] (terurai)
Struktur
Struktur kristal	Tetragonal, tI12^[1]
Grup ruang	I4/m, No. 87^[2]
Konstanta kisi	a = 0,65358 nm, c = 0,44562 nm
Volum kisi (V)	0,1904 nm³
Satuan formula (Z)	2
Termokimia
Kapasitas kalor (C)	133 ± 8 J/mol·K^[1]
Entropi molar standar (S^o)	200 ± 15 J/mol·K^[1]
Entalpi pembentukan standar (Δ_fH^o)	−1941 ± 25 kJ/mol^[1]
Energi bebas Gibbs (Δ_fG)	−1834 ± 25 kJ/mol^[1]
Kecuali dinyatakan lain, data di atas berlaku pada suhu dan tekanan standar (25 °C [77 °F], 100 kPa).
Referensi

Neptunium(V) fluorida atau neptunium pentafluorida adalah sebuah senyawa anorganik dari neptunium dan fluorin dengan rumus NpF₅.

Sintesis

Neptunium(V) fluorida dapat dibuat dengan mereaksikan neptunium(VI) fluorida dengan iodin:^[1]

\mathrm {10\ NpF_{6}\ +\ I_{2}\ \longrightarrow \ 10\ NpF_{5}\ +\ 2\ IF_{5}}

Dari persamaan di atas, iodin pentafluorida adalah produk sampingan.

Sifat

Neptunium(V) fluorida terurai secara termal pada suhu 318 °C menghasilkan neptunium(IV) fluorida dan neptunium(VI) fluorida. Tidak seperti dengan uranium(V) fluorida, neptunium(V) fluorida tidak bereaksi dengan boron triklorida, tetapi bereaksi dengan litium fluorida dalam HF anhidrat menghasilkan LiNpF₆.^[1]

Referensi

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Haire, Richard G. (2006). "Neptunium". Dalam Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (edisi ke-3). Dordrecht, Belanda: Springer Science+Business Media. hlm. 730–736. doi:10.1007/1-4020-3598-5_9. ISBN 1-4020-3555-1.
^ Zachariasen, W. H. (1949). "Crystal chemical studies of the 5f-series of elements. XII. New compounds representing known structure types". Acta Crystallographica. 2 (6): 388–390. doi:10.1107/S0365110X49001016 .

Senyawa neptunium

Np(III)

Np(IV)

Senyawa organoneptunium(IV)	Np(C₂O₄)₂ Np(C₈H₈)₂

Np(V)

NpF₅

Np(VI)

NpF₆

Np(VII)

NpO₂(OH)₃

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