|Computational chemistry requires big computers. A researcher from Trinity University, San Antonio was just barely able to complete his calculations on a gem-dimethyl effect problem. |
A quote from his 2008 research paper in the Journal of Organic Chemistry DOI : Unfortunately, we lack sufficient disk space, but we were able to complete the computations at CCSD(T)/6-311+G(2d,p)//PBE1PBE/6-311+G(2df,2pd) with the PBE1PBE ZPVEs . Donations are welcome.