00 AT&T; 9:29 AM 73% . 43) Which of the following is the staggered conformer for
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00 AT&T; 9:29 AM 73% . 43) Which of the following is the staggered conformer for rotation about the C1-C2 bond in the following 46) Which of the following is not a nucleophile? A) NH3 CH3 CHCHCHCH C) CH3OCH3 D) Br E) FeBr3 47) Which of the following statements about propene, CH3CH CH2, is correct? A) The compound has a cis and trans isomer B) All the carbon atoms are sp2 hybridized. C) All nine atoms lie in the same plane. D) It has eight sigma bonds. E) It is a Lewis acid. CH CHCH 8) What are the configurations of the products formed in the following reaction? CH2Cl A)I B)II C)111 D) IV E)V A) 1S,2S only B) 1R,2R only C) 1R,2S only D) equal amounts of 1R2R and 1R2S E) equal amounts of 1R,2R and 1S,2s 44) Which of the following compounds have an asymmetric center? 49) Which of the following reagents is required for the reaction shown below? CH3CH= CH2 + ? CH3CH2CH3 A) H20H504 D) H2HCI B) H20/Ni C)H2, Pd/C E) H2/H2S04 50) What is the common name of the following A)I E) V 45) Which alkyl halide reacts most rapidly in an SN2 A) (CH3CCH2CH2CI B) (CH3 CCH2CH2F C) (CH3)CCH2CH2Br D CH3ICCH2CH2l E) All primary halides react at the same rate in SN2 A) isoheptyl chloride B) sec-heptyl chloride C) neoheptyl chloride D) n-heptyl chloride E) tert-heptyl chlorideExplanation / Answer
43) Correct option is E)V
Rotate one carbon atom in 60o increments either clockwise or anticlockwise, while keeping the other carbon fixed. Continue until you return to the original conformation.
1. A staggered conformation with two larger groups 180o from each other is called anti.
2. A staggered conformation with two larger groups 60o from each other is called gauche.
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