Wolfram(II) iodida

Wolfram(II) iodida
Penanda
Model 3D (JSmol)
3DMet {{{3DMet}}}
ChemSpider
Nomor EC
Nomor RTECS {{{value}}}
  • InChI=1S/2HI.W/h2*1H;/q;;+2/p-2
    Key: BMKSRUJKNOBSHP-UHFFFAOYSA-L
  • [I-].[I-].[W+2]
Sifat
I2W
Massa molar 437,65 g·mol−1
Penampilan padatan coklat tua[1]
Densitas 6.79 g·cm−3[2]
Titik lebur 800 °C (terurai)[2]
tidak larut[2]
Senyawa terkait
Anion lain
wolfram(II) klorida
wolfram(II) bromida
Kation lainnya
kromium(II) iodida
molibdenum(II) iodida
Senyawa terkait
wolfram(III) iodida
Kecuali dinyatakan lain, data di atas berlaku pada suhu dan tekanan standar (25 °C [77 °F], 100 kPa).
Referensi

Wolfram(II) iodida adalah iodida wolfram, dengan rumus kimia [W6I8]I4, atau disingkat WI2.

Persiapan

Wolfram diiodida dapat diperoleh dari dekomposisi wolfram(III) iodida:[1]

6 WI
3
→ [W
6
I
8
]I
4
+ 3 I
2

Ia juga dapat dibentuk melalui reaksi perpindahan wolfram(II) klorida dan yodium:[1]

[W
6
Cl
8
]Cl
4
+ 12 I → [W
6
I
8
]I
4
+ 12 Cl

Hal ini juga dapat terbentuk melalui reaksi langsung wolfram dan yodium, yang merupakan reaksi reversibel. Reaksi ini dapat digunakan dalam lampu halogen.[3]

W + I
2
⇌ WI
2

Wolfram(II) iodida juga dapat diperoleh dengan mereaksikan wolfram heksakarbonil dengan iodin.[4]

Sifat

Wolfram(II) iodida adalah padatan berwarna coklat tua yang stabil di udara dan kelembapan. Strukturnya sama dengan wolfram(II) klorida, mengkristal dalam sistem kristal ortorombik, dengan grup ruang Bbem (No. 64), dan parameter kisi a = 1258 pm, b = 1259 pm, c = 1584 pm.[1]

Referensi

  1. ^ a b c d Handbuch der präparativen anorganischen Chemie. 3 (edisi ke-3., umgearb. Aufl). Stuttgart: Enke. 1981. ISBN 978-3-432-87823-2. 
  2. ^ a b c Haynes, William M.; Lide, David R.; Bruno, Thomas J. (2012). CRC handbook of chemistry and physics: a ready reference book of chemical and physical data (edisi ke-93rd). Boca Raton: CRC. ISBN 978-1-4398-8049-4. 
  3. ^ Latscha, Hans Peter; Mutz, Martin (2011). Chemie der Elemente. Chemie-Basiswissen. Berlin Heidelberg: Springer. ISBN 978-3-642-16915-1. 
  4. ^ Johnson, Brian Frederick Gilbert (1972). Inorganic chemistry of the transition elements. A specialist periodical report. London: Chemical society. ISBN 978-0-85186-500-3. 

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