Portmess Homework Q&S 72

Portmess Homework Q&S 72 - B-13. Which one of the...

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B-11. Which point on the potential energy diagram is represented by the Newman projection shown? B-12. Which of the following statements is true? ( a ) Van der Waals strain in cis -1,2-dimethylcyclopropane is the principal reason for its decreased stability relative to the trans isomer. ( b ) Cyclohexane gives off more heat per CH 2 group on being burned in air than any other cycloalkane. ( c ) The principal source of strain in the boat conformation of cyclohexane is angle strain. ( d ) The principal source of strain in the gauche conformation of butane is torsional strain.
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Unformatted text preview: B-13. Which one of the following has an equatorial methyl group in its most stable conformation? B-14. The structure shown is the carbon skeleton of adamantane, a symmetrical hydrocarbon having a structure that is a section of the diamond lattice. Adamantane is: ( a ) Bicyclic ( c ) Tetracyclic ( b ) Tricyclic ( d ) Pentacyclic C(CH 3 ) 3 H 3 C ( a ) C(CH 3 ) 3 CH 3 ( b ) C(CH 3 ) 3 CH 3 ( c ) C(CH 3 ) 3 CH 3 ( d ) C(CH 3 ) 3 CH 3 ( e ) H H H H H 3 C CH 3 ( a ) ( b ) ( c ) ( d ) 66 CONFORMATIONS OF ALKANES AND CYCLOALKANES...
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This note was uploaded on 09/20/2011 for the course CHM 2210 taught by Professor Reynolds during the Spring '01 term at University of Florida.

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