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18 Nov 2019
Which of the following terms best describes a diet- alder reaction? a (2+2) photo chemically allowed reaction d) an electrophilic addition reaction 2. The Diels*Alder reaction is a concerted reaction; this means: a) a mixture of end and expo products are formed, but an cxo is major. b) all bond making and bond breaking occurs simultaneously. c) the reaction is highly endothermic. d) the products contain rings. 3. Which of the follow ring compounds is the most reactive discophile in a Diels-Alder reaction with 1.3-butadiene? a)CHj-CHCHj b) CHj-CH-COCHj c) CH2*CH-OCHj d) (CHj) 2C-CH2 4. Absorption of UV-Visible energy by a molecule results in: a) vibrational transitions b) nuclear transitions c) rotational transitions c) electronic transitions 5. 1, 3.5-CycloheptartrienyI action is a) aromatic b) nonaromatic c) ant aromatic d) none of these 6. In the molecular orbital representation of benzene, how many pi-molecular orbitals are present? a) I b) 3 c)4 d)6 7. In the IR. w hat wave number in the spectrum is for the C-H stretching observed in the aromatic ring? a) 3300cm'1 b) 3030cm1 c)2950cm'' d) 2300cm'1 8. Which of the following is also an acceptable name for 2-nitroanisol? a) m - nitro meth oxy benzene b) m - nitro phenol c) p-nitro meth ox benzene d) o-meth ox nitro benzene 9. Which statement is correct? a) A dyne having an electron withdrawing group is good for the Diels-Alder reaction. b) A discophile having an electron donating group is good for the Diels-Alder reaction. [2+2J Cycle addition reaction is allowed photo chemically. The Diels- Alder reaction prefers the product. Which statement is correct? aromatic is the physical property which is about the scent from the compound. In the reaction, the HOMO and LUMP iron reactants has to react to each other. In the resonance structures, the position of carbon in the structure can be altered. the stability of the molecule or ion is not related to the resonance structure.
Which of the following terms best describes a diet- alder reaction? a (2+2) photo chemically allowed reaction d) an electrophilic addition reaction 2. The Diels*Alder reaction is a concerted reaction; this means: a) a mixture of end and expo products are formed, but an cxo is major. b) all bond making and bond breaking occurs simultaneously. c) the reaction is highly endothermic. d) the products contain rings. 3. Which of the follow ring compounds is the most reactive discophile in a Diels-Alder reaction with 1.3-butadiene? a)CHj-CHCHj b) CHj-CH-COCHj c) CH2*CH-OCHj d) (CHj) 2C-CH2 4. Absorption of UV-Visible energy by a molecule results in: a) vibrational transitions b) nuclear transitions c) rotational transitions c) electronic transitions 5. 1, 3.5-CycloheptartrienyI action is a) aromatic b) nonaromatic c) ant aromatic d) none of these 6. In the molecular orbital representation of benzene, how many pi-molecular orbitals are present? a) I b) 3 c)4 d)6 7. In the IR. w hat wave number in the spectrum is for the C-H stretching observed in the aromatic ring? a) 3300cm'1 b) 3030cm1 c)2950cm'' d) 2300cm'1 8. Which of the following is also an acceptable name for 2-nitroanisol? a) m - nitro meth oxy benzene b) m - nitro phenol c) p-nitro meth ox benzene d) o-meth ox nitro benzene 9. Which statement is correct? a) A dyne having an electron withdrawing group is good for the Diels-Alder reaction. b) A discophile having an electron donating group is good for the Diels-Alder reaction. [2+2J Cycle addition reaction is allowed photo chemically. The Diels- Alder reaction prefers the product. Which statement is correct? aromatic is the physical property which is about the scent from the compound. In the reaction, the HOMO and LUMP iron reactants has to react to each other. In the resonance structures, the position of carbon in the structure can be altered. the stability of the molecule or ion is not related to the resonance structure.
Trinidad TremblayLv2
29 Apr 2019