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Microwave assisted reactions dipolar polarization

In microwave-assisted synthesis, a homogeneous mixture is preferred to obtain a uniform heating pattern. For this reason, silica gel is used for solvent-free (open-vessel) reactions or, in sealed containers, dipolar solvents of the DMSO type. Welton (1999), in a review, recommends ionic liquids as novel alternatives to the dipolar solvents. Ionic liquids are environmentally friendly and recyclable. They have excellent dielectric properties and absorb microwave irradiation in a very effective manner. They exhibit a very low vapor pressure that is not seriously enhanced during microwave heating. This makes the process not so dangerous as compared to conventional dipolar solvents. The polar participants of organic ion-radical reactions are perfectly soluble in polar ionic liquids. [Pg.279]


See other pages where Microwave assisted reactions dipolar polarization is mentioned: [Pg.381]    [Pg.54]    [Pg.211]    [Pg.54]    [Pg.405]    [Pg.82]    [Pg.54]    [Pg.525]    [Pg.146]   
See also in sourсe #XX -- [ Pg.221 ]

See also in sourсe #XX -- [ Pg.221 ]




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Assisted reactions

Dipolar polarization

Microwave 1,3-dipolar

Microwave assisted reactions

Microwave-assisted

Microwaves dipolar polarization

Reaction polarity

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