1.

Give the structure of the principal of organic product (s) produced 3-ehtyl-2-pentene under each of the following reaction conditions. (i) H_20//Br_2 (ii) cold dilute KMnO_4//OH^- (iii) (a) BH_3 (b) NaOH//H_2O_2 (iv) (a) Hg (Oac)_2 (b) NaBH_4 (v) (a) O_3 (b) Zn dust aqueous CH_3COOH Peroxybenzoic acid (vii) CHCl_3/t - HOK

Answer»

Solution :`CH_3-CH_2-UNDERSET(CH_2-CH_3)underset(|)C=CH-CH_3` (A)
3-ethyl-2-pentene
(i) A `overset(H_2O //Br_2)rarrCH_3-CH_2-overset(Br)overset(|)underset(C_2H_5)underset(|)C-underset(Br)underset(|)CH-CH_3 + CH_3-overset(OH)overset(|)underset(C_2H_5)underset(|)C-underset(Br)underset(|)CH-CH_3`
(II)A `overset(KMnO_4//OH)underset(Cold)rarrCH_3-overset(OH)overset(|)underset(C_2H_5)underset(|)C-overset(HO)overset(|)CH-CH_3`
(III) `CH_3-CH_2-overset(CH_3)overset(|)CH-underset(OH)underset(|)CH-CH_3`
(iv) `CH_3-CH_2-overset(CH_3)overset(|)underset(C_2H_5)underset(|)C-CH_2-CH_3`
(v) `CH_3-CH_2-underset(C_2H_5)underset(|)C=Oand CH_3CHO`
(vi)


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