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Henry Rzepa's Blog

Henry Rzepa's Blog
Chemistry with a twist
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Following on from my template exploration of the Wilkinson hydrogenation catalyst, I now repeat this for the Grubbs variant of the Alkene metathesis reaction. As with the Wilkinson, here I focus on the stereochemistry of the mechanism as first suggested by Chauvin[cite]https://doi.org/10.1002/macp.1971.021410112[/cite], an aspect lacking in eg the Wikipedia entry.

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On 24th January 1984, the Macintosh computer was released, as all the media are informing us. Apparently, some are still working. I thought I would give my own personal recollections of that period. In fact, the Mac reached UK stores via a dealership only in 1985.

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The Science education unit at the ACS publication C&EN publishes its list of molecules of the year (as selected by the editors and voted upon by the readers) in December. Here are some observations about three of this year’s batch.

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Around 1996, journals started publishing what became known as “ESI” or electronic supporting information, alongside the articles themselves, as a mechanism for exposing the data associated with the research being reported and exploiting some of the new opportunities offered by the World Wide Web. From the outset, such ESI was expressed as a paginated Acrobat file, with the Web being merely a convenient document delivery mechanism.

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In 2023, we very much take for granted that everyone and pretty much everything is online. But it was not always so and when I came across an old plan indicating how the chemistry department at Imperial College was connected in 1989, I was struck by how much has happened in the 34 years since. Nowadays all the infrastructures needed are effectively “built in” to the building when it is constructed and few are even aware of them.