This web server implements the Cremer-Pople puckering coordinate analysis for ring molecules. Based on the seminal work published in J. Am. Chem. Soc. 97, 1354-1358 (1975).
A mathematically rigorous description of ring conformations using N-3 orthogonal parameters for an N-membered ring.
z? = v(2/N) S? q? cos[f? + 2pn(j-1)/N]
Q = v(S q)