2-propanone boiling point

In a hood, to a well-stirred dispersion of 62 gm (1.35 moles) of methyl-hydrazine, 175 ml of chlorobenzene, and 20 gm of powdered, anhydrous sodium sulfate is added dropwise, with cooling, 61 gm (0.663 mole) of freshly distilled l-chloro-2-propanone. After the addition has been completed, the reaction mixture is stirred for 1 hr. The moist sodium sulfate is separated by filtration and the filtrate is distilled. The fraction boiling between 60°C and 64°C is collected as product, yield 16.8 gm (31 %) of a yellow liquid. On redistillation the boiling point is raised slightly to 61°-64°C, index 1.4300. 

The vapor pressure of 2-propanone (CH COCH, more commonly known as acetone) is 67 Torr at 0.0°C and 222 Torr at 25.0°C. Calculate (a) the standard enthalpy of vaporization (b) the standard entropy of vaporization (use Eq. 3) (c) the standard free energy of vaporization (d) the boiling point of 2-propanone. 

An aqueous solution of the obtained N-[3-chloro-3-(p-tolyl)propyl]piperidine hydrochloride was hydrogenated at 3 atmospheres in the presence of buffered palladium-on-charcoal catalyst. l-Piperidino-2-methyl-3-(p-tolyl)-3-propanone was purified by distilling the base (boiling point 106-107°C/1 mm) and reconverting to the hydrochloride, melting point 216-217°C. 

Acetone (dimethyl ketone, 2-propanone, CH3COCH3, melting point -94.6°C, boiling point 56.3°C, density 0.783) is the simplest ketone and is a colorless liquid that is miscible in all proportions with water, alcohol, or ether. 

The only ketone which we shall consider is acetone, CH3—CO— CH3, or propanone, also called di-methyl ketone. Acetone is a liquid that boils at 56.5°. It has a peculiar odor, and is soluble in all proportions in water. It is a valuable solvent for many organic substances, and is used in the manufacture of explosives and in important synthetic reactions. It is the third important constituent of crude wood alcohol or pyroligneous acid, being formed as a product of the dry distillation of wood. Table XIII gives the names, formulas and boiling" points of a few of the more common and important ketones. 

In this case, propanone is the constituent of the reaction mixture that has the lowest boiling point. Hence, by continuously distilling it out of the system, the equilibrium may be effectively displaced to completion. The excess of propan-2-ol exchanges with the mixed aluminium alkoxide to liberate the reduction product. 

Acetone, also called propanone or dimethyl ketone, is the smallest ketone. It is The most familiar household use oface-a colorless, volatile liquid with a pleasant odor. The boiling point of acetone is tone iS as active substance in nail 56 °C. It can mix with water, alcohol and ether in all proportions. It is a wonder- polish remover. ful organic solvent, dissolving varnishes, lacquers, resins, plastics, paints, oils and their derivatives. 

For small molecules with the same number of electrons, permanent dipole-dipole forces are often stronger than van der Waals forces. For example, propanone (CH3COCH3, = 58) has a higher boiling point than butane (CH3CH2CH2CH3, Af = 58) (Figure 4.40). 

To a suspension of l-phenyl-2,3-dibromo-3-(4-nitrophenyl)-l-propanone 1 (12.4 g, 30.2 mmol) in 1,000 ml of 95% ethanol was added 1.80 g (30 mmol) of ethylenediamine and 6.06 g (60 mmol) of triethylamine (Scheme A.4). The mixture was stirred and heated to boiling. After the dibromide had dissolved, the reaction mixture was allowed to stand overnight at room temperature. Evaporation of most of the solvent precipitated crude 7-(4-nitrophenyl)-2-phenyl-3,6-diazabicyclo[4.1.0]hept-2-ene 3, which was filtered and washed with 95% ethanol and with water. A yield of 7.05 g (80%) was obtained. Melting point 137-140°C with decomposition. 

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