The Diels-Alder reaction is a concerted reaction; this means: A) involves reacti

Question

The Diels-Alder reaction is a concerted reaction; this means: A) involves reaction intermediate. B) all bond making and bond breaking occurs simultaneously. C) the products contain rings. D) the reaction follows Markovnikov's rule. 2. Aromatic molecules contain A) no B) 4n + 1 (with n an integer) C) 4n + 2 (with n an integer) D) 4n (with n an integer) ? electrons. 3. Which of the following is another name for cyclobutadiene? A) [2] annulene B) [4Jannulene C) [6Jannulene D) Dewar benzene 4. What two atomic orbitals or hybrid atomic orbitals overlap to form the C-O bond in ethanol? A) C sp2 + O sp2 ?) ? sp3 + 0sp3 C) C sp2 + O sp3 D) C sp3 + O sp2 5. Classify the reaction below as an oxidation, a reduction, or neither. (CH3)2CHCHO (CH3)2CHCH20H A) oxidation B) reduction C) neither 6. Classify the reaction below as an oxidation, a reduction, or neither. cis-pent-2-ene ? pentane A) oxidation B) reduction C) neither

Explanation / Answer

1. concerted reaction = in this reaction all bond making and bond breaking occurs simultaneously

2. aromatic molecule contains (4n+2) pie electrons

3. [4] annulene is known as cyclobutadiene.

4. C - sp3

O- sp3

5. alcohol to aldehyde (oxidation occurs)

6. the addition of hydrogen (alkene to an alkane) is hydrogenation or reduction.

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