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Natrium tiosianat

Natrium tiosianat
Kation natrium
Kation natrium
Anion tiosianat
Anion tiosianat
Nama
Nama IUPAC
Natrium tiosianat
Penanda
Model 3D (JSmol)
3DMet {{{3DMet}}}
ChEBI
ChEMBL
ChemSpider
Nomor EC
Nomor RTECS {{{value}}}
UNII
  • InChI=1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1 YaY
    Key: VGTPCRGMBIAPIM-UHFFFAOYSA-M YaY
  • InChI=1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1
    Key: VGTPCRGMBIAPIM-REWHXWOFAB
  • Key: VGTPCRGMBIAPIM-UHFFFAOYSA-M
  • [Na+].[S-]C#N
Sifat
NaSCN
Massa molar 81.072 g/mol
Penampilan Kristal tidak berwarna
Densitas 1.735 g/cm3
Titik lebur 287 °C (549 °F; 560 K)
Titik didih 307 °C (585 °F; 580 K) Berdekomposisi
139 g/100 mL (21 °C)
225 g/100 mL (100 °C)
Kelarutan Dapat larut dalam aseton, alkohol, amonia, SO2
Keasaman (pKa) −1.28
Indeks bias (nD) 1.545
Struktur
Ortorombik
Bahaya
Lembar data keselamatan ICSC 0675
Berbahaya (Xn)
Frasa-R R20/21/22, R32, R36, R37, R38
Frasa-S S22, S26, S36
Dosis atau konsentrasi letal (LD, LC):
764 mg/kg (tikus, lewat mulut)[1]
Senyawa terkait
Anion lain
Natrium sianat
Natrium sianida
Kation lainnya
Kalium tiosianat
Amonium tiosianat
Kecuali dinyatakan lain, data di atas berlaku pada suhu dan tekanan standar (25 °C [77 °F], 100 kPa).
N verifikasi (apa ini YaYN ?)
Referensi

Natrium tiosianat adalah senyawa kimia dengan rumus NaSCN. Senyawa padat tidak berwarna ini merupakan salah satu sumber utama anion tiosianat. Maka dari itu, senyawa ini digunakan dalam proses sintesis obat-obatan dan bahan kimia lainnya.[2] Natrium tiosianat biasanya dibuat dari reaksi natrium sianida dengan sulfur:

8 NaCN + S8 → 8 NaSCN

Kristal natrium tiosianat berbentuk ortorombik. Senyawa ini biasanya digunakan di laboratorium untuk menguji keberadaan ion Fe3+.

Kegunaan dalam sintesis kimia

Natrium tiosianat digunakan untuk mengubah alkil halida menjadi alkiltiosianat. Reaksi isopropil bromida dengan natrium tiosianat di dalam larutan etanol panas akan menghasilkan isopropil tiosianat.[3] Protonasi natrium tiosianat akan menghasilkan asam isotiosianat, S=C=NH (pKa = −1.28).[4]

Referensi

  1. ^ Sodium thiocyanate, chemicalland21.com
  2. ^ Schwan, A. L. (2001). Encyclopedia of Reagents for Organic Synthesis. New York: John Wiley & Sons. doi:10.1002/047084289X.rs109. 
  3. ^ Shriner, R. L. (1943). "Isopropyl Thiocyanate". Org. Synth.; Coll. Vol. 2: 366. 
  4. ^ Chiang, Y.; Kresge, A. J. (2000). "Determination of the Acidity Constant of Isothiocyanic Acid in Aqueous Solution". Canadian Journal of Chemistry. 78 (12): 1627–1628. doi:10.1139/cjc-78-12-1627. 

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