Which of the following chair conformations is the most stable? H H A H Tu B A A and B have the same stability. B A is more stable than B if the solvent is polar protic. B is more stable than A if the solvent is polar aprotic.

6:54 Question 27 of 28 Submit What is the relationship between these two sugars? H. СНО H. O- ОН ОН ОН CH2OH CH2OH A) identical structures B) enantiomers C) diastereomers エエ I I

Which species in each pair is more stable?

Thank you

19. Which Newman projection rep- resents the most stable confor- mation of 3-methylpentane when viewed down the 2-3 carbon- carbon bond? A) B) CH3 H CH3 H CH3 H H H CH₂CH3 H CH₂CH3 CH3 C) D) CH3 CH3 CH3 CH3 H H H H CH₂CH3 CH3 CH2CH3 H

What is the correct order of stability in descending order for the conformations shown below

Choices a.3 b. 2 c. 4 d. 1

Which set of Newman projections represents correct staggered and the eclipsed least stable conformation for the following compound: Н H3C H тос Н- CH3 H3C O A 000 A ОВ CH3 CH3 Н H Н Å Å Å Å H H Н CH3 H3C CH3 CH3 CH3 CH3 Ос OD H3C H3C- 00 В CH3 H3C Н Н Н CH3 H3C. с Н ___H то H- CH3 CH3 Н- D H3C CH3 Н Н CH3

Which Newman projection corresponds to the conformation of this compound that can undergo E2 elimination? Et CI E2 ? H tBu tBu tBu H H Me Et. H Me H CI tBu CI H CI H CI H Me Et Me Et A B D