A Guidebook to Mechanism in Organic Chemistry
Elimination Reactions 41 kcal/mole and )>C=C<^->-C=C- 23 kcal/mole, though it should be emphasised that these figures m ...
The E\ Mechanism THE El MECHANISM This mechanism, like the SNl, envisages the rate of the reaction as being dependent on the sub ...
Elimination Reactions ing as quite separate competing reactions and lends support to a car bonium ion as the common intermediat ...
The E2 Mechanism HO I I C—C—Hal slow H.O+ ^C-L^Hal - C=C +Hale / \ (II) The formation of a carbanion such as (II) with so litt ...
Elimination Reactions a (i) Stereospecificity in E2 eliminations It has been found that E2 elimination reactions exhibit a high ...
Stereospecificity in E2 Eliminations /\ B:H B:rH R R R R^Ck-R' -> C=C \ R Br R' R' ; £j Br^0 (VI) (VII) leaving group should ...
Elimination Reactions In cases such as (V) where a sterospecific trans elimination cannot take place cis elimination can be made ...
Orientation in E2 Eliminations R • CH, • CH,—CH—CH,; RCH,CH,CH=CH, (XIX) (XVIII) Y RCH,CH=CHCH, (XX) (Y=Hal, NR',orSR'J Three fa ...
Elimination Reactions At first sight, therefore, it might be concluded that the Saytzeff mode of elimination was the normal one ...
Orientation in E2 Eliminations of Hofmann product produced, and the same result is observed when branching is introduced into th ...
Elimination Reactions then heated. Removal of the nitrogen from the compound by one such treatment indicates that it was present ...
Elimination v. Substitution Br (XXVII) nor to compounds in which the bridge comprises five or more atoms, for a sufficiently pla ...
Elimination Reactions tendency of tertiary and secondary, as compared with primary, halides to undergo unimolecular elimination ...
* Effect of Activating Groups «* EFFECT OF ACTIVATING GROUPS Thus far we have only considered the effect of alkyl, and occasiona ...
Elimination Reactions —C-^C—C—Y «-» — C=C—C—Y II II i °°\ i NJ-C—C-Y «- N=C—C-Y 3 o eQ but it is not certain that such intermedi ...
Debromination O MeC—CH—CH, I Br \ O (XXXII) MeC—CH=CH, ? MeC—CH,—CH, — Br (XXXIII) electron-withdrawing substituent is much grea ...
Elimination Reactions Apart from any preparative or diagnostic value the reaction may have, it is of course the above state of a ...
Cis-Elimination Hydrogen halide is lost in a two-stage process to yield carbon dichlor- ide, a carbene (cf. p. 93), as an interm ...
Elimination Reactions The kinetic law followed is of the form Rate <x [ester] and the reaction is believed to proceed through ...
Cis-Elimination compared with ca. 400° for acetates); the advantage of both, com pared with other methods of olefine formation ...
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