Author Question: What is the energy difference between the two lowest-energy conformations of 2,3-dimethylbutane? ... (Read 19 times)

jazziefee · **on:** Aug 23, 2018

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