Big Chemical Encyclopedia

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

Articles Figures Tables About

Hydrates steric destabilization

The basic piSTa values, which have to be considered as equilibrium values, including those of anhydrous and hydrated species, reveal a destabilizing inductive effect of the 6- and 7-methyl group towards 3,4-hydrate formation, as do also the 2-methylamino and 2-dimethylamino groups for additional steric reasons. If the cation of 2-aminopteridine did not add water its value would be about 1.6, arrived at by substracting from the piSTa 2.6 of the essentially anhydrous 2-amino-4,7-dimethylpteridine cation 0.3 for the 7- and 0.7 for the 4-methyl group. The difference between the observed value of 4.29 and the... [Pg.267]

FIGURE 16.28 Like alkenes, more substituted carbonyl groups are more stable than their less substimted counterparts. In the hydrates, increasing substitution results in increasing destabilization through steric interactions. [Pg.778]


See other pages where Hydrates steric destabilization is mentioned: [Pg.371]    [Pg.778]    [Pg.710]    [Pg.92]    [Pg.36]    [Pg.276]    [Pg.450]    [Pg.269]    [Pg.96]    [Pg.1556]    [Pg.440]    [Pg.251]    [Pg.545]    [Pg.315]    [Pg.620]   
See also in sourсe #XX -- [ Pg.778 , Pg.780 ]




SEARCH



Destabilization

Destabilized

Destabilizers

Destabilizing

© 2024 chempedia.info