mole4dMol 4D (Molecules in Four Dimensions) is a Web-based molecule editor using the Chime browser plug-in linked to a MOPAC calculation engine the produces structuralR. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), moled, in Geiriadur Prifysgol Cymru On (in Welsh), University of Wales