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Diacetyl (/ d aɪ j ə ˈ s iː t ə l / dy-yuh-SEE-tuhl; IUPAC systematic name: butanedione or butane-2,3-dione) is an organic compound with the chemical formula (CH 3 CO) 2. It is a yellow liquid with an intensely buttery flavor. It is a vicinal diketone (two C=O groups, side-by-side).
It is a precursor to many fine chemicals. A prominent industrial example is the crossed aldol condensation with diethyl ketone to give trimethylcyclohexenone, this can be easily converted to trimethylhydroquinone, which is a precursor to the vitamin E. [8] Other derivatives include crotonic acid, 3-methoxybutanol and the food preservative ...
3,3’,4,4’-Benzophenone tetracarboxylic dianhydride (BTDA) is chemically, an aromatic organic acid dianhydride. It may be used to cure epoxy-based powder coatings. It has the CAS Registry Number of 2421-28-5 and a European Community number 219-348-1. It is REACH and TSCA registered. The formula is C 17 H 6 O 7 with a molecular weight of 322. ...
Each carboxylate group is usually planar; but the two groups may lie in different planes due to rotation about the carbon–carbon bonds. They are coplanar in the hydrated salts NaHC 4 O 4 ·2H 2 O and CsHC 4 O 4 ·2H 2 O, nearly coplanar in the guanidinium salt [C(NH 2) 3] + [HC 4 O 4] −, but off by 60° or more in other salts such as ...
Pages in category "Acetals" The following 17 pages are in this category, out of 17 total. ... Polyoxymethylene dimethyl ethers; S. Solvent Yellow 124; T. 1,1,3,3 ...
0.9152 g/cm 3: Melting point: −78 °C (−108 °F; 195 K) Boiling point: 163 °C (325 °F; 436 K) Hazards GHS labelling: Pictograms. Signal word. Danger: Hazard ...
The resulting product, diethyl 3,5-dimethylpyrrole-2,4-dicarboxylate, has been called Knorr's Pyrrole ever since. In the Scheme above, R 2 = COOEt, and R 1 = R 3 = Me represent this original reaction. Knorr's pyrrole can be derivatized in a number of useful manners. One equivalent of sodium hydroxide will saponify the 2-ester selectively.
Hydrogenation of 3-hydroxybutanal gives 1,3-butanediol: CH 3 CH(OH)CH 2 CHO + H 2 → CH 3 CH(OH)CH 2 CH 2 OH. This diol is a precursor to 1,3-butadiene, precursor to diverse polymers. Polymerization of 3-hydroxybutanal is also spontaneous, but can be stopped with the addition of water. Aldol has been used in making perfumes and in ore ...