Search results
Results from the WOW.Com Content Network
The reaction of an organic substrate with phosgene is called phosgenation. [9] Phosgenation of diols give carbonates (R = H, alkyl, aryl), which can be either linear or cyclic: n HO−CR 2 −X−CR 2 −OH + n COCl 2 → [−O−CR 2 −X−CR 2 −O−C(=O)−] n + 2n HCl. An example is the reaction of phosgene with bisphenol A to form ...
Phosgene oxime can be prepared by reduction of chloropicrin using a combination of tin metal and hydrochloric acid as the source of the active hydrogen reducing agent: Cl 3 CNO 2 + 4 [H] → Cl 2 C=N−OH + HCl + H 2 O. The observation of a transient violet color in the reaction suggests intermediate formation of trichloronitrosomethane (Cl 3 ...
CSCl 2 is mainly used to prepare compounds with the connectivity CSX 2 where X = OR, NHR. [5] Such reactions proceed via intermediate such as CSClX. Under certain conditions, one can convert primary amines into isothiocyanates.
The main polycarbonate material is produced by the reaction of bisphenol A (BPA) and phosgene COCl 2. The overall reaction can be written as follows: The first step of the synthesis involves treatment of bisphenol A with sodium hydroxide, which deprotonates the hydroxyl groups of the bisphenol A. [6] (HOC 6 H 4) 2 CMe 2 + 2 NaOH → Na 2 (OC 6 ...
Phosgene (carbonyl dichloride, Cl–CO–Cl) is a very toxic gas that is the dichloride of carbonic acid (HO–CO–OH). Both chlorine atoms in phosgene can undergo reactions analogous to the preceding reactions of acyl halides. Phosgene is used a reactant in the production of polycarbonate polymers, among other industrial applications.
A white solid, it is prepared by reaction of anthranilic acid with phosgene. [1] Reactions. Hydrolysis gives carbon dioxide and anthranilic acid. Alcoholysis proceeds ...
The net reaction is as follows: 2 PhOH + COCl 2 → PhOCO 2 Ph + 2 HCl. The use of phosgene can be avoided by the oxidative carbonylation of phenol with carbon monoxide: [2] 2 PhOH + CO + [O] → PhOCO 2 Ph + H 2 O. Dimethyl carbonate can also be transesterified with phenol: CH 3 OCO 2 CH 3 + 2 PhOH → PhOCO 2 Ph + 2 MeOH
It can be made by reacting phosgene with ethanol, producing hydrogen chloride as a byproduct. Because chloroform can react with oxygen to form phosgene, chloroform can be stabilized for storage by adding 1 part (by mass) of ethanol to 100 parts (by mass) of chloroform, so that any phosgene that forms is converted into diethyl carbonate.