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Kekulé structure of benzene with alternating double bonds. Kekulé's most famous work was on the structure of benzene. [3] In 1865 Kekulé published a paper in French (for he was then still in Belgium) suggesting that the structure contained a six-membered ring of carbon atoms with alternating single and double bonds. [11]
Here Kekulé spoke of the creation of the theory. He said that he had discovered the ring shape of the benzene molecule after having a reverie or day-dream of a snake biting its own tail (a symbol in ancient cultures known as the ouroboros). [40] This vision, he said, came to him after years of studying the nature of carbon-carbon bonds.
The title refers to the chemist August Kekulé's realization of the ringed structure of benzene after a symbolic dream of the ouroboros. McCarthy asks how the non-linguistic unconscious mind could provide a meaningful solution to a fundamentally linguistic problem.
In a tweet from July 2024, Drew Daniel of electronic music duo Matmos described a fictional music genre he encountered in a dream entitled "hit em". Recounted to him by a nondescript woman in the dream, the genre is a type of electronic music "with super crunched out sounds" in a 5/4 time signature with a tempo of 212 beats per minute.
Jack Nicklaus had a dream that allowed him to correct his golf swing. German chemist Friedrich August Kekulé stated that the idea for the ring structure of benzene came to him in a day-dream, in which he saw snakes biting their own tails. Jasper Johns was inspired to paint his first flag painting as a result of a dream.
Fusing angular rings around a benzene moiety leads to an increase in stability. The Clar structure of anthracene , for instance, has only one π-sextet but, by moving one ring into the angular position, phenanthrene is obtained, the Clar structure of which carries two circles instead of one.
The first woman was elected to lead a country 64 years ago. Here’s a look at where, and when, women have secured national leadership positions since then.
Heteroarenes are aromatic compounds, where at least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen, or sulfur. [3] Examples of non-benzene compounds with aromatic properties are furan, a heterocyclic compound with a five-membered ring that includes a single oxygen atom, and pyridine, a heterocyclic compound with a six-membered ring containing one ...