Predict the products that would be formed from such a reaction a)1-pentene (80%) and 2-pentene (20%) B)1-pentene (20%) and 2-pentene (80 %) C)1-pentene (50 %) and 2-pentene (50 %) D)1-pentene (0 %) and 2-pentene (100 %) E)1-pentene (100 %) and 2-pentene (0 %) What reaction pathway is followed by the reaction above? a)E2 dehydrohalogenation B)E1 dehydrohalogenation C)SN1 dehydrohalogenation D)SN2 dehydrohalogenation A mixture of E1 and E2 pathways What is responsible for the formation of different products (major and minor). A)The different activated complex involved in the mechanism. B)Bimolecular nuclephilic substitution reaction C)Bimolecular Elimination reaction D)The presence of sodium ethoxide E)The hybridisation nature of the secondary carbocation
INSTRUCTIONS: Choose from the options A-E and explain briefly by illustrations the chemistry behind each answer.
Preamble: A reaction flask contains a 2-bromopentane in an ethanolic solution of sodium ethoxide at room temperature and results in the formation of two olefinic products.
Predict the products that would be formed from such a reaction
a)1-pentene (80%) and 2-pentene (20%)
B)1-pentene (20%) and 2-pentene (80 %)
C)1-pentene (50 %) and 2-pentene (50 %)
D)1-pentene (0 %) and 2-pentene (100 %)
E)1-pentene (100 %) and 2-pentene (0 %)
What reaction pathway is followed by the reaction above?
a)E2 dehydrohalogenation
B)E1 dehydrohalogenation
C)SN1 dehydrohalogenation
D)SN2 dehydrohalogenation
A mixture of E1 and E2 pathways
What is responsible for the formation of different products (major and minor).
A)The different activated complex involved in the mechanism.
B)Bimolecular nuclephilic substitution reaction
C)Bimolecular Elimination reaction
D)The presence of sodium ethoxide
E)The hybridisation nature of the secondary carbocation
All the following is true about the reaction in question 1 except?
A)The reaction follows Zaistev’s rule
Sodium ethoxide is the nucleophile in this reaction
B)The more highly substituted
C)Dehydrohalogenation reaction of the
D)The starting material (reactant) is a secondary alkyl halide
All the following parameters would affect the rate and kinetics of the reaction except
A)Solvent medium
B)Reactiontemperature
C)Reaction time
D)Geometryand structure ofthe alkyl halide
E)pH
What would be the major product when 2-iodopentane is involved in a dehydrohalogenation reaction?
A)2-iodo-1-pentene
B)2-pentene
C)(E)-2-pentene
D)(Z)-2-pentene
E)Cis-2-pentene
Preamble: A student chemist in an attempt to synthesise compound B from the
Predict the chemical name of compound B
A)p-chlorobenzylamine
B)4-bromoaniline
C)benzylamine
D)p-chloronitrile
E)p-chlorobenzaldehyde
What is the reaction name for the chemical transformation of A to B
A)reductive amination
B)catalytic reduction
C)carbonyl dehydration
D)Hofmann elimination
E)Aldehyde rearrangement
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