Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Halogens displacement reactions

Pyran, 2-halotetrahydro-dipole moments, 3, 628 halogen displacement reactions, 2, 64 C NMR, 3, 587 Pyran, 2-hydroxy-synthesis, 3, 741 Pyran, 3-hydroxy-synthesis, 2, 91... [Pg.763]

A. Preparation.—Halogen displacement reactions have been used to prepare a number of new aminofluorophosphines. Aminodifluorophos-phine (1) has been prepared for the first time, from either bromodifluoro-phosphine or chlorodifluorophosphine, and ammonia. Studies of its n.m.r. spectrum have been made (see Chapter 11). The related NN-difluoroaminodifluorophosphine (2) has been prepared, from difluoroiodo-phosphine, and found to be explosive. Two syntheses of A-alkyl-amino-difluorophosphines have been reported, one of which was complicated by the subsequent formation of the phosphorane (3) and the bis-(A-alkylamino)fluorophosphine (4). [Pg.40]

Sn2 and SN2 Reactions with Halides and Sulfonates. Corey and Posner discovered that lithium dimethylcuprate can replace iodine or bromine by methyl in a wide variety of compounds, including aryl, alkenyl, and alkyl derivatives. This halogen displacement reaction is more general and gives higher yields than displacements with... [Pg.680]

These halogen displacement reactions may be carried out under PTC conditions, and have been reviewed.91... [Pg.571]

Halogen Displacement. Another activity series summarizes the halogens behavior in halogen displacement reactions ... [Pg.128]

The increase in for H displacement processes in Table 2.14b, relative to the halogen displacement reactions in Table 2.14a, is quite marked and a large fraction of the 3-5 kcal mole" of potential energy must be released as translational energy. Variations of Et for the F + C2H4 reaction also suggest that more than the statistical component of Ex is converted to... [Pg.156]


See other pages where Halogens displacement reactions is mentioned: [Pg.28]    [Pg.787]    [Pg.346]    [Pg.189]    [Pg.787]    [Pg.804]    [Pg.415]    [Pg.787]    [Pg.804]    [Pg.129]    [Pg.326]    [Pg.787]    [Pg.804]    [Pg.144]    [Pg.361]    [Pg.7]    [Pg.273]    [Pg.67]    [Pg.294]    [Pg.168]   
See also in sourсe #XX -- [ Pg.130 ]

See also in sourсe #XX -- [ Pg.130 ]

See also in sourсe #XX -- [ Pg.139 ]




SEARCH



Benzene, halo-, halogen displacement phenylazo-, reactions

Displacement reactions involving a halogen atom

Halogen displacement

Halogenation reactions

Halogens single displacement reaction

Reaction displacement

Reactions halogens

© 2024 chempedia.info