Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The strain energy difference introduced by weighting factors. (A) 3CWK A300; (B) 1CBS A200 (1.6Å); (C) 2LBD A500 (1.8Å); (D) 2VE3 A1445 (2.06Å); (E) 2VE3 B1445 (2.1Å). Energies are from HF/6-31G(d) calculations using HF/6-31G(d) geometries.
