Tiyokarbonik asit

Tiyokarbonik asit
Adlandırmalar
IUPAC adı
karbonotritiyoik asit
Diğer adlar
tritiyokarbonik asit
Tanımlayıcılar
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.008.931 Bunu Vikiveri'de düzenleyin
EC Numarası
  • 209-822-6
  • C(=S)(S)S
Özellikler
Molekül formülü CH2S3
Molekül kütlesi 110.22 g/mol
Görünüm kırmızı, yağlı sıvı
Yoğunluk 1.483 g/cm3(sıvı)
Erime noktası −26.8 °C (−16.3 °F)
Kaynama noktası 58 °C (136 °F)
Aksi belirtilmediği sürece madde verileri, Standart sıcaklık ve basınç koşullarında belirtilir (25 °C [77 °F], 100 kPa).
Bilgi kutusu kaynakları

Tiyokarbonik asit, karbonik asit ile ilişkili bir inorganik asittir. Kimyasal formülü H2CS3 olan kararsız kırmızı bir yağdır. Diğer tiyokarbonatlardan ayırt etmek için sıklıkla tritiyokarbonik asit olarak adlandırılır.

Keşif ve sentezi

İlk olarak 1824'te Zeise tarafından kısaca ve daha sonra 1826'da Berzelius tarafından daha ayrıntılı olarak rapor edildi,[1] her iki durumda da karbon disülfürün bir hidrosülfür tuzu (örn. Potasyum hidrosülfür) üzerindeki etkisi ile üretildi.[2]

CS2 + 2 KSH → K2CS3 + H2S

Asitlerle muamele, tiyokarbonik asidi kırmızı bir yağ halinde serbest bırakır.

K2CS3 + 2 HX → H2CS3 + 2 KX

Hem asit hem de tuzlarının birçoğu kararsızdır ve özellikle ısıtma üzerine karbon disülfür salınımı yoluyla ayrışır:

H2CS3 → CS2 + H2S

Uygulama

Tiyokarbonik asidin şu anda önemli bir uygulaması yoktur. Bazen tioksantat olarak adlandırılan esterler RAFT polimerizasyonunda kullanım bulur.

Kaynakça

  1. ^ Berzelius, J. J. (1826). "Ueber die Schwefelsalze" [About the sulfur salts]. Annalen der Physik (in German). 82 (4): 425–458. doi:10.1002/andp.18260820404.
  2. ^ O'Donoghue, Ida Guinevere; Kahan, Zelda (1906). "CLXXIV.—Thiocarbonic acid and some of its salts" 6 Mayıs 2019 tarihinde Wayback Machine sitesinde arşivlendi. (PDF). J. Chem. Soc., Trans. 89 (0): 1812–1818. doi:10.1039/CT9068901812.

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