Question

9. (5 points) Elimination reactions of els NaOCHCH in ethanol can give the same or di or 3-methyleyelohexene (2). Which of (a)-(d) indicates the main products nation reactions of a 2-methylcyclohexanes with Ho in ethanol can give the same or different main product, 1-methylcyclohexene Br NaOCH, NaOCH CH,OH CH,OH trans cis a) 1 from both the cis and trans substrates b) 2 from both the cis and trans substrates c) from the cis, and 2 from the trans substrate d) 2 from the cis, and 1 from the trans substrate 10. (5 points) Reactions of di-deuterated bromocyclohexanes, 1 and 2, by the E2 mechanism give mono-deuterated cyclohexene A and di-deuterated cyclohexene B. Which of the statements (a)-(d) best indicates the most probable selectivities of two reactions. NaOCH; CH2OH NaOCH CH,OH A B a) A from both land 2 b) B from both 1 and 2 c) A from 1, and B from 2 d) B from 1, and A from 2

Answer 1

• OP MCH₂ cis HH In eyelonexane system the leaving group must be im axial Position for a facile Ea anti- periplamoura elimination Scann

@ CH2 Hochz (minor Product) beta O CH3 (main produet) Scanned with CamScanner as hishly substituted alkene

CH₃ не з ета. geH₂ Here only this H is anti to Be ICS Scanned with CamScanner

Answer is =) (①) 0 from the eis is the main product. only one product is formed from the trans 0 from the trans Product is the main. answer is =>(c) BP asti nels Answer = (e) A from I is obtained and s Son Therionswer if C. B from 2 is obtained Sach Stanner