Nowadays, data supporting most publications relating to the synthesis of organic compounds is more likely than not to be found in associated “supporting information ” rather than the (often page limited) article itself. For example, this article[cite]10.1021/jacs.6b13229[/cite] has an SI which is paginated at 907;

Living in London, travelling using public transport is often the best way to get around. Before setting out on a journey one checks the status of the network. Doing so today I came across this page: our open data from Transport for London.  I learnt that by making TFL travel data openly available, some 11,000 developers (sic!) have registered for access, out of which some 600 travel apps have emerged.

Bonds are a good example of something all chemists think they can recognise when they see them. But they are also remarkably dependent on context. We are running a molecular modelling course at the moment, and I found myself explaining to someone how very context-sensitive they can be. I thought it might be useful to collect my thoughts here.