An infection by a coronavirus belonging to the same family of that responsible for the Severe Acute Respiratory Syndrome (SARS) has been reported in the United Kingdom. A 49 years old man from Qatari with a travel history to the Kingdom of Saudi Arabia has been admitted to an intensive care unit in Doha, Qatar, on 7 September, with symptoms of acute respiratory syndrome with renal failure. He has been transferred to the UK on 11 September, where the Health Protection Agency confirmed the presence of a novel coronavirus, whose sequence was 99.5% similar to that responsible of a previous fatal case reported earlier this year in a 60 year-old Saudi national.
Given that coronaviruses are a large family of viruses that can cause different kinds of diseases, from the common cold to the SARS, WHO is currently trying to gather further information about these two cases and did not recommended any travel restrictions.
A new coronavirus found in UK
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Discovered a New Carbon-Carbon Chemical Bond
A group of researchers from Hokkaido University has provided the first experimental evidence of the existence of a new type of chemical bond: the single-electron covalent bond, theorized by Linus Pauling in 1931 but never verified until now. Using derivatives of hexaarylethane (HPE), the scientists were able to stabilize this unusual bond between two carbon atoms and study it with spectroscopic techniques and X-ray diffraction. This discovery opens new perspectives in understanding bond chemistry and could lead to the development of new materials with innovative applications.
In the cover image: study of the sigma bond with X-ray diffraction. Credits: Yusuke Ishigaki
After nearly a year of review, on September 25, a study was published in Nature that has sparked a lot of discussion, especially among chemists. A group of researchers from Hokkaido University synthesized a molecule that experimentally demonstrated the existence of a new type of chemical bond, something that does not happen very often.