WEO 2. Datument (DOI: 10.6084/m9.figshare.777773, SHORTDOI: n5b) obtained from the Figshare digital repository and transcluded into WEO2 (Web-enhanced-object) using the code <iframe src="http://wl.figshare.com/articles/777773/embed?show_title=1" width="850" height="400" frameborder="1"></iframe> to produce an interactive visual display using JSmol.