Which of the following is the lowest energy conformer of the following compound looking down the...
1. a) Calculate the lowest energy conformer of 2-methylpropane. Use as many calculations as necessary. Then, draw the Newman projection looking down the C1-C2 bond and draw it with 3-D geometry. b) Calculate the lowest energy conformer of 2-methylbutane. Use as many calculations as necessary. Then, draw the Newman projection looking down the C2-C3 bond and draw it with 3-D geometry.
Which chair conformer (A D) represents the bond-line structure at left in its lowest energy state? A A-value Me 7.6 kJ/mol, A-value iPr 9.2 kJ/mol (d) (a) (c) (b)
Which chair conformer (A D) represents the bond-line structure at left in its lowest energy state? D A-value Me 7.6 kJ/mol, A-value iPr 9.2 kJ /mol (a) (c) (d) (b)
8. Which of the following is the lowest energy conformer of 2,3-dimethylbutane? н Сн, CH I AI B) II C) III D) IV CH3 H₃C HAC J CH₂ H HC CH₂ H C HC CH HC I 9. Which of the following cycloalkanes has the least angle strain? A) Cycloheptane B) Cyclopropane C) Cyclohexane D) Cyclobutane . . " 10. Which of the following chair conformations represents trans-1,4-dimethylcyclohexane?
check and solve the empty ones please
Which of the following is a Newman projection for the following compound as viewed down the indicated bond? сун 9. Draw the most stable conformer of the following compound. C/ 10. Draw the Newman projection for the highest energy and lowest energy conformation of the following compound. (size: Br > CH) Br me ) be ved me TH me heighest 11. Which of the following molecule is trans-1,2-dimethylcyclohexane? A) B) D) Othe 12....
9.78 The two lowest energy conformations of pentane are the anti-anti and the anti-gauche forms, in terms of arrangements around the two central C─C bonds. A recent study analyzed the conformations of 3-heptyne as an “elongated” analogue of pentane, where a carbon-carbon triple bond is “inserted” between C2 and C3 of pentane.[15] Interestingly, the researchers found that in each of the two most stable conformations of 3-heptyne, C1 and C6 are nearly eclipsed (looking down the alkyne group). In one...
Draw the lowest energy conformer of each of the 5 compounds. NC.
3. (6 points) For each compound below, draw a Newman projection of the lowest energy conformation. Sight down the indicated bond. The front carbon has been drawn for you. Be careful to preserve stereochemistiy. H. I- - - - - - - Hinn H2C CH(CH3)2 H2CH3 CH2CH2CH3
Which is the least stable chair conformer of the following
compound?
Which is the least stable chair conformer of the following compound? III IV
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. ------- lowest energy highest energy