37. Which of the following statements about the conformations of acyclic alkanes is not true? A) The staggered and eclipsed conformations are equally stable. B) The staggered conformations are more stable than the eclipsed conformations. C) An energy minimum and maximum occur every 60° as the conformation changes from staggered to eclipsed. D) Conformations that are neither staggered nor eclipsed are intermediate in energy. 38. Which of the following statements about the conformations of acyclic alkanes is true? A) A staggered conformation with two larger groups 180° from each other is called gauche. B) Staggered conformations are at energy maxima and eclipsed conformations are energy minima. C) A staggered conformation with two larger groups 60° from each other is called anti. D) Gauche conformations are generally higher in energy than anti conformations.

37. Which of the following statements about the conformations of acyclic alkanes is not true? A) The staggered and eclipsed conformations are equally stable. B) The staggered conformations are more stable than the eclipsed conformations. C) An energy minimum and maximum occur every 60° as the conformation changes from staggered to eclipsed. D) Conformations that are neither staggered nor eclipsed are intermediate in energy. 38. Which of the following statements about the conformations of acyclic alkanes is true? A) A staggered conformation with two larger groups 180° from each other is called gauche. B) Staggered conformations are at energy maxima and eclipsed conformations are energy minima. C) A staggered conformation with two larger groups 60° from each other is called anti. D) Gauche conformations are generally higher in energy than anti conformations.

Chemistry for Today: General, Organic, and Biochemistry

9th Edition

ISBN:9781305960060

Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Chapter12: Unsaturated Hydrocarbons

Section: Chapter Questions

Problem 12.67E

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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

Question

37-38

please answer all

37. Which of the following statements about the conformations of acyclic alkanes is not
true?
A) The staggered and eclipsed conformations are equally stable.
B) The staggered conformations are more stable than the eclipsed conformations.
C) An energy minimum and maximum occur every 60° as the conformation changes
from staggered to eclipsed.
D) Conformations that are neither staggered nor eclipsed are intermediate in energy.
38. Which of the following statements about the conformations of acyclic alkanes is true?
A) A staggered conformation with two larger groups 180° from each other is called
gauche.
B) Staggered conformations are at energy maxima and eclipsed conformations are
energy minima.
C) A staggered conformation with two larger groups 60° from each other is called
anti.
D) Gauche conformations are generally higher in energy than anti conformations.

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