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Substances melting points

A mixture consisting of 8 grams of estriol, 20 grams of succinic acid anhydride and 60 ml of pyridine is heated at 90 C for 4 hours, after which the reaction mixture is poured into water. The aqueous solution is extracted with ether, the ether layer is separated, washed with diluted sulfuric acid and after that with water until neutral, then evaporated to dryness to obtain 14 grams of an amorphous substance. Melting point 82° to 86°C. This drying residue proves to consist of a mixture of estriol disuccinate and estriol monosuccinate, which are separated by repeated crystallization from a mixture of methanol and water. [Pg.580]

TABLE 5.2 Substance Melting and Boiling Points of Substances Melting point (°C) Boiling point (°C) Substance Melting point (°C) Boiling point (°C)... [Pg.304]

Substance Melting point, Boiling point, °C, Rotation solvent Refer enees... [Pg.239]

Substance Melting point (K) Enthalpy of crystallisation (kl/kg) Boiling point (K) Enthalpy of vaporisation (kJ/kg)... [Pg.827]

Substance Melting point °K. Equinbrium film pressure in dynes per cm. for solid crystal in dynes per cm. per ° 0. [Pg.65]

Substance Melting point/°C Boiling point/°C Density /gem"3... [Pg.42]

Substance Melting point, °C. [a]D, degrees Solvent References... [Pg.125]

A mixture of 5.0 g (0.0357 g/mol) of p-fluorophenylethyl alcohol, 2.0 g (0.007 g/mol) of 5-chloro-2,4-disulphamylaniline, 2.0 g (0.0068 g/mol) of potassium bichromate and 15 ml of concentrated hydrochloric acid (0.176 g/mol) and 25 ml of water is heated under reflux for 1 h. The mixture is allowed to cool, and 15 ml of ether are added to separate the excess of p-fluorophenylethyl alcohol. The aqueous layer is decanted and frozen for 2 h and the precipitate is separated, washed with water and dried in vacuum over phosphoric anhydride. There are collected 1.35 g (yield 47.5%) of the 1,1-dioxide of 3-p-fluorophenyl-methyl-7-sulphamyl-6-chloro-3,4-dihydrobenzo-l,2,4-thiadiazine, which when recrystallised from 30 ml of 50% alcohol on "Norit" active carbon takes the form of a white crystalline substance, melting point is 239°C. [Pg.2615]

Substance Melting point, °(7. [ ]d Rotation solvent Refer- ences... [Pg.28]

Substance Melting point, eC. [< ]d Solvent Refer-encee... [Pg.91]

Substance Melting Point °C [ ]d Rotation Solvent Reference8... [Pg.133]

See other pages where Substances melting points is mentioned: [Pg.38]    [Pg.6]    [Pg.162]    [Pg.11]    [Pg.27]    [Pg.401]    [Pg.15]    [Pg.127]    [Pg.1482]    [Pg.90]    [Pg.94]    [Pg.281]   
See also in sourсe #XX -- [ Pg.132 ]



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Melting points of ionic substances

Melting points pure substance

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