Search results
Results from the WOW.Com Content Network
It is prepared by condensation of chloranil and 3-amino-N-ethylcarbazole. It has a centrosymmetric angular structure. [ 2 ] For many years, the structure was assigned, incorrectly, as having a "linear structure" ( EC no. 228-767-9, CAS RN 6358-30-1) which differ in terms of the carbazole ring fusion .
Bucherer carbazole synthesis. A third method for the synthesis of carbazole is the Graebe–Ullmann reaction. Graebe–Ullmann reaction. In the first step, an N-phenyl-1,2-diaminobenzene (N-phenyl-o-phenylenediamine) is converted into a diazonium salt which instantaneously forms a 1,2,3-triazole. The triazole is unstable and at elevated ...
Melting point: 66 °C (151 °F; 339 K) Boiling point: ... It is produced by the vinylation of carbazole with acetylene in the presence of base. [6] Related compounds
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; ... Ethyl Acetate: 77.1 [5] Acetic Anhydride: 139.0 [6] Ethylene ...
Polyvinylcarbazole was discovered by the chemists Walter Reppe (1892-1969), Ernst Keyssner and Eugen Dorrer and patented by I.G. Farben in the USA in 1937. [4] [1] PVK was the first polymer whose photoconductivity was known.
3-Amino-9-ethylcarbazole (AEC) is a chemical compound commonly used as a chromogenic substrate in immunohistochemistry, specifically for visualizing sections stained with HRP-conjugated secondary antibodies. [1]
1-Ethyl-3-methylimidazolium chloride or [EMIM]Cl is an ionic liquid that can be used in cellulose processing. [1] [2] The cation consists of a five-membered ring with two nitrogen and three carbon atoms, i.e. a derivative of imidazole, with ethyl and methyl groups substituted at the two nitrogen atoms. [3] Its melting point is 77–79 °C. [4]
Many semicarbazones are crystalline solids, useful for the identification of the parent aldehydes/ketones by melting point analysis. [ 1 ] A thiosemicarbazone is an analog of a semicarbazone which contains a sulfur atom in place of the oxygen atom.