Henry Rzepa's Blog Chemistry with a twist

December 1, 2016

Long C=C bonds.

Following on from a search for long C-C bonds, here is the same repeated for C=C double bonds.

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March 7, 2016

Global initiatives in research data management and discovery: searching metadata.

The upcoming ACS national meeting in San Diego has a CINF (chemical information division) session entitled "Global initiatives in research data management and discovery". I have highlighted here just one slide from my contribution to this session, which addresses the discovery aspect of the session.

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August 26, 2015

Mesomeric resonance in substituted benzenes: a crystallographic reality check.

Previously, I showed how conjugation in dienes and diaryls can be visualised by inspecting bond lengths as a function of torsions. Here is another illustration, this time of the mesomeric resonance on a benzene ring induced by an electron donating substituent (an amino group) or an electron withdrawing substituent (cyano).

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