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Bond strengthening, methyl groups effect

The methyl substitution at a-position leads to an increase of the reactivity of styrene during polymerization as well as EDA-complex formation. However, the methyl substitution in p-position achieves an opposite effect. The strengthened complex formation connected with a further increase of the HOMO is faced with a drastically decreased polymerization rate. This can be explained by the well known steric effect of group hindrance around the p-C-atom under attack 72), as well as the polarity switch in the vinyl double bond. The p-C-atom in the p-methyl styrene possesses a... [Pg.202]

See other pages where Bond strengthening, methyl groups effect is mentioned: [Pg.15]    [Pg.551]    [Pg.109]    [Pg.169]    [Pg.18]    [Pg.87]    [Pg.103]    [Pg.452]    [Pg.386]    [Pg.4]    [Pg.110]    [Pg.422]    [Pg.236]    [Pg.109]    [Pg.169]    [Pg.91]    [Pg.168]    [Pg.169]    [Pg.10]    [Pg.7]    [Pg.10]    [Pg.532]    [Pg.244]    [Pg.171]    [Pg.51]    [Pg.169]    [Pg.35]    [Pg.356]    [Pg.1066]    [Pg.25]   
See also in sourсe #XX -- [ Pg.386 ]



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