Explain briefly by illustrations the chemistry behind each answer 1. 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(1-pentene and 2-pentene) I) What reaction pathway is followed by the reaction above? A. E2 dehydrohalogenation B. E1 dehydrohalogenation C. SN1 dehydrohalogenation D. SN2 dehydrohalogenation E. A mixture of E1 and E2 pathways II) What is responsible for the formation of different products (major and minor). A. The different activated complex involved in the mechanism. B.Bimolecular Nucleophilic substitution reaction C.Bimolecular Elimination reaction D.The presence of sodium ethoxide E.The hybridisation nature of the secondary carbocation III) All the following is true about the reaction in question 1 except? A. The reaction follows Zaistev’s rule B. Sodium ethoxide is the nucleophile in this reaction C. The more highly substituted alkene is the most stable product D.Dehydrohalogenation reaction of the alkyl halide is an elimination reaction E.The starting material (reactant) is a secondary alkyl halide

Explain briefly by illustrations the chemistry behind each answer

1. 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(1-pentene and 2-pentene)

I)

What reaction pathway is followed by the reaction above?
A. E2 dehydrohalogenation
B. E1 dehydrohalogenation
C. SN1 dehydrohalogenation
D. SN2 dehydrohalogenation
E. A mixture of E1 and E2 pathways

II)

What is responsible for the formation of different products (major and minor).
A. The different activated complex involved in the mechanism.
B.Bimolecular Nucleophilic substitution reaction
C.Bimolecular Elimination reaction
D.The presence of sodium ethoxide
E.The hybridisation nature of the secondary carbocation

III)

All the following is true about the reaction in question 1 except?
A. The reaction follows Zaistev’s rule
B. Sodium ethoxide is the nucleophile in this reaction
C. The more highly substituted alkene is the most stable product
D.Dehydrohalogenation reaction of the alkyl halide is an elimination reaction
E.The starting material (reactant) is a secondary alkyl halide