1, 2 - Dibromocyclohexane on dehydrobromination gives:

1,2 di bromo cyclohexane on dehydrohalogenation gives

Allybromide on dehydrobromination gives

Explain the stereochemistry of the products from E2 dehalogenation with I^(Θ) of the following. a. (i) Meso -2-3- dibromobutane and (ii) S,S-2,3- dibromo - butane. b. E2- dehydrobromination of (i) R,R-2,3- dibromobutane and (ii) meso -(R,S)-2,3- debromobutane c. From which conformation of bromocyclohexane in the E2 dehydrobromination is best achieved.

Which of the following molecules have zero dipole moment? (I) gauche conformation of 1, 2 - dibromoethane. (II) anti conformation of 1, 2 - dibromoethane. (III) trans - 1, 4 - dibromocyclohexane (IV) cis - 1, 4 - dibromocylohexane (V) tetrabromomethane. (VI) 1, 1- dibromocyclohexane

Which of the following molecules have non-zero dipole moments ? (I) Gauche conformation of 1, 2 -dibromoethane (II) Anti conformation 1,2-dibromorthane (III) Trans-1,4 -dibromocyclohexane (IV) Cis-1, 4-dibromocyclohexane (V) Tetrabromomethane (VI) Dibromocychexane

Which of the following molecules have non-zero dipole moments ? (I) gauche conformation of 1,2-dibromoethane (II) anti conformation of 1,2-dibromoethane (III) trans-1,4-dibromocyclohexane (IV) cis1,4-dibromocyclohexane (V) tetrabromomethane (VI) 1,1-dibromocyclexane