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orgo_prac._exam1_pg6 - 7‘ Cyclopentadiene is unusually...

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Unformatted text preview: 7‘: Cyclopentadiene is unusually acidic for a hydrocarbon. An explanation for this is the following statement. A) The carbon atoms of cyclopentadiene are all spZ—hybridized. B) Cyclopentadiene is aromatic. . _ _ . _ * C) Removal of a proton from cyclopentadiene yields an aromatic anlon. D) Removal of a hydrogen atom from cyclopentadiene yields a highly stable free radical. E) Removal of a hydride ion from cyclopentadiene produces an aromatic cation. W_W, « muvwwdwnri.w lr? The correct name for the compound shown below is: Br NH2' Br A) ald—Dihromoaniline - D) 3,6-Dibromoaniline B) 2,4-Dibromoaniline - E) 2,6—D1bromoan111ne * C) 2,5-Dibromoaniline 18’ Why would 1,; -cyclohexadiene undergo dehydrogenation readily?” A) It is easily reduced. B) Hydrogen is a small molecule. C) 1,3-Cyclohexadiene has no resonance energy. * D) It would gain considerable stability by becoming benzene. E) It would not undergo dehydrogenation. reactions. * B) All of the hydrogen atoms of benzene are equivalent. C) The carbon—carbon bonds of benzene are alternately short and long around the ring. D) The benzene ring is a distorted hexagon. E) None of the above éZC) Toluene is the name commonly assigned to: A) Hydroxybenzene D) Ethylbenzene '9 B) Aminobenzene E) Methoxyhenzene lJI * C) Methylhenzene ...
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