II. Termination A) llonly B. IonlyC1and ll only D, l, ll, and 33. Terminal alkyn
ID: 698234 • Letter: I
Question
II. Termination A) llonly B. IonlyC1and ll only D, l, ll, and 33. Terminal alkynes are more acidic than both alkenes and alkanes due to A. The stabilization of the negative charge in orbitals with higher s character B. The greater distance of the negative charge from the nucleus of the carbon atom C. The greater stability of an sp hybrid orbital D. The larger number of n electrons E. The linear structure of the resulting conjugate base 34. What would be the net change in bonds if one mole of 3-hexyne is treated with 2 moles of Ha in the presence of platinum? A. B. C. D. -1 pi bond, + 4 sigma bonds -2 pi bonds, +2 sigma bonds -2 pi bonds, +4 sigma bonds -2 pi bonds, +6 sigma bonds 35. What does the number 2 represent in the E2 reaction? A. Number of mechanistic steps B. Rate is dependent on both substrate and base concentration C. Number of bonds brokern D. Number of transition states formed in the reaction E. Both A and 8 36. What is the product when 3-methyl-2-pentene is reacted with HBr? A. 2-bromo-3-methylpentane B. 3-bromo-3-methylpentane C. 2-bromopentane D. 2-bromo-2-methylpentene E. A mixture of A and C as the maja product? A. Primary alcohol B. Secondary alcohol C. Tertiary alcohol D. Cis-diol E. Trans-diol
Explanation / Answer
1. (c) greater stability of sp orbital.
2.(a) 1 pi and 4 sigma
3.(b) rate is based on both substrate and base concentration
4.(b) 3-methyl 3 brome pentane
5.(A) primary alcohol