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Reaction with Metals

Give R and S ...

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Give R and S configurations of each pairs ofenatiomers of -2-Fluoropropane ,2-Methylbutane , 2-Bromopentane, 3-Methylpentane

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Q. Arrange the compounds of each set in order of reactivity towards

S_{N} 2

displacement.
(i) 2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane

(ii) 1-Bromo-3-methylbutane, 2-Bromo-2-methylbutane, 2-Bromo-3-methylbutane

(iii) 1-Bromobutane, 1-Bromo-2, 2-dimethylpropane, 1-Bromo-2-methylbutane,1-Bromo-3-methylbutane.

Q. The reactivity of

2

2

(I)

1

(I I)

2 -

(I I I)

S_{N} 2

displacement is such that:

Q. Arrange the following in increasing order of boiling points.
(i) 3-methylpentane
(ii) 3-chloropentane
(iii) 3-bromopentane
(iv) 3,3-dichloropentane

Q. The Following compounds are given to you:
2- Bromopentane, 2- Bromo - 2 methylbutane, 1- Bromopentane.

(a) Write the comound which is most reactive towards

S_{N} 2

reaction.
(b) Write the compound which is optically active.
(c) Write the compound which is most reactive towards

β

- elimination reaction.

Q. Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:
(i)

1 - B r o m o - 1 - m e t h y l c y c l o h e x a n e

2 - C h l o r o - 2 - m e t h y l b u t a n e

2, 2, 3 - T r i m e t h y l - 3 - b r o m o p e n t a n e

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