Dear Colleagues, Stimulated by Bernhard's posting, and whilst certainly "beyond his sense of bewilderment", I recalled that there were studies on this issue. These are neatly summarised in the Topical review :- http://dx.doi.org/10.1107/S010876810000269X By Frank Herbstein in Acta Cryst B I imagine colleagues will find this of interest. Best wishes, John
Prof John R Helliwell DSc FInstP CPhys FRSC CChem F Soc Biol. Chair School of Chemistry, University of Manchester, Athena Swan Team. http://www.chemistry.manchester.ac.uk/aboutus/athena/index.html
