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Cooling bath. A typical experimental setup for an aldol reaction. Both flasks are submerged in a dry ice/acetone cooling bath (−78 °C) the temperature of which is being monitored by a thermocouple (the wire on the left). A cooling bath or ice bath, in laboratory chemistry practice, is a liquid mixture which is used to maintain low ...
Dry ice: Acetonitrile-41 Dry ice: Pyridine-42 Dry ice: Cyclohexanone-46 Dry ice: m-Xylene-47 Dry ice: Diethyl carbitol-52 Dry ice: n-Octane-56 Dry ice: Diisopropyl ether-60 Dry ice: Chloroform-61 Liquid N 2: Chloroform-63 [2] Dry ice: Ethanol-72 Note: without the addition of ethylene glycol, temp is -78 °C. Dry ice: Trichloroethylene-73 Dry ...
The order of addition of the reagents of the Mitsunobu reaction can be important. Typically, one dissolves the alcohol, the carboxylic acid, and triphenylphosphine in tetrahydrofuran or other suitable solvent (e.g. diethyl ether), cool to 0 °C using an ice-bath, slowly add the DEAD dissolved in THF, then stir at room temperature for several hours.
Diethyl ether, or simply ether, is an organic compound with the chemical formula (CH3CH2)2O, sometimes abbreviated as Et2O. [a] It is a colourless, highly volatile, sweet-smelling ("ethereal odour"), extremely flammable liquid. It belongs to the ether class of organic compounds. It is a common solvent.
When dry ice was mixed with diethyl ether, it was called "Thilorier's mixture", [36] [37] presumably since Thilorier had noted in 1835 that a mixture of liquid carbon dioxide and ether produced extreme cold when sprayed on objects. [38] It was subsequently found that under reduced pressure, temperatures as low as −110 °C could be maintained ...
A rotary evaporator [1] (rotovap) is a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation.When referenced in the chemistry research literature, description of the use of this technique and equipment may include the phrase "rotary evaporator", though use is often rather signaled by other language (e.g., "the sample was evaporated ...
Dry ice colloquially means the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO 2 does not have a liquid state at normal atmospheric pressure and sublimes directly from the solid state to the gas state. It is used primarily as a cooling agent, but is also used in fog machines at theatres for dramatic effects.
The position of the equilibrium is influenced by solvent, temperature, and the nature of the various substituents. It is known that magnesium center in Grignard reagents typically coordinates two molecules of ether such as diethyl ether or tetrahydrofuran (THF). Thus they are more precisely described as having the formula RMgXL 2 where L = an ...