ILkane ring?15. Discuss the aspects of conformation and stereochemistry that would haveconsidered for complete description of the structure of molecules having thegeneralin these molecules?H.(CH2)H.16. Predict the preferred conformation of the isomeric (Z- and E-) 3-penten-2-ones, A,R = CH3. How would you expect the conformational picture to change as R becomesprogressively larger?FigtheRCCH=CHCH3V.17. Figures 17A and 17B (p. 183) show energy as a function of rotation for a series of 2-substituted acetaldehydes, with 0= 0° in the syn conformation and 0 = 180 in theanti conformation. The calculations were done using the PM3 method. Figure 17A ISfor a vacuum, whereas Fig. 17B is for a solvent cavity with a dielectric constant of 4.7.structure A. How would the size of the (CH,), bridge affect conformational cquilibria

Answered: 16. Predict the preferred conformation…

16. Predict the preferred conformation of the isomeric (Z- and E-) 3-penten-2-ones, A, R = CH3. How would you expect the conformational picture to change as R becomes progressively larger?

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 46CTQ

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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

100%

ILkane ring?
15. Discuss the aspects of conformation and stereochemistry that would have
considered for complete description of the structure of molecules having the
general
in these molecules?
H.
(CH2)
H.
16. Predict the preferred conformation of the isomeric (Z- and E-) 3-penten-2-ones, A,
R = CH3. How would you expect the conformational picture to change as R becomes
progressively larger?
Fig
the
RCCH=CHCH3
V.
17. Figures 17A and 17B (p. 183) show energy as a function of rotation for a series of 2-
substituted acetaldehydes, with 0= 0° in the syn conformation and 0 = 180 in the
anti conformation. The calculations were done using the PM3 method. Figure 17A IS
for a vacuum, whereas Fig. 17B is for a solvent cavity with a dielectric constant of 4.7.
structure A. How would the size of the (CH,), bridge affect conformational cquilibria

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