What is the energy difference between the two lowest-energy ...

[jazziefee]

What is the energy difference between the two lowest-energy conformations of 2,3-dimethylbutane?
  1.the energy of one gauche interaction
  2.the energy of two gauche interactions
  3.the energy of two H  CH3 eclipsing interactions
  4.the energy of three H  CH3 eclipsing interactions
  5.the energy of two CH3  CH3 eclipsing interactions

Question 2

The lowest energy conformation of decane resembles a straight rod. It is a fully stretched zig-zag conformation with all bonds staggered and all large substituents anti to each other. Imagine we bend this chain at carbon 5. What is the minimum strain that such a once-bent conformation (bent rod) must have?
  1.3.8 kJ/mol
  2.4.0 kJ/mol
  3.6.0 kJ/mol
  4.0.0 kJ/mol
  5.11.0 kJ/mol

[bbburns21]

Answer to Question 1

1

Answer to Question 2

1

[jazziefee]

YES! Correct, THANKS for helping me on my review

[bigcheese9]

Thanks for the timely response, appreciate it