How does the molecular structure determine the rotational entropy? Find out by constructing a molecule with the largest possible rotational entropy using Molecule Calculator. The largest value I could find was 133 J/molK. Can you beat that?

Here's the Molecule Calculator:

http://dgu.ki.ku.dk/molcalc-1.2/

Question

How does the molecular structure determine the rotational entropy? Find out by constructing a molecule with the largest possible rotational entropy using Molecule Calculator. The largest value I could find was 133 J/molK. Can you beat that? 

Here's the Molecule Calculator: 

http://dgu.ki.ku.dk/molcalc-1.2/

anonymous · Answer

Entropy is determined by number of accessible quantum states, molecular symmetry reduces the number of distinct states, so you need to look for the ugliest unsymettrical molecules for high rotational entropy.
Maybe there is a theoretical limit to the rotational entropy ? I'm not sure.

What was your molecule ?
I found one in the list with rotational entropy 134.27 J/molK, but it isn't named.

anonymous · Answer

Thanks, ProfBrainstorm,

It's an assignment from my teacher, and it was him, who found that molecule.