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Cake day: October 22nd, 2023

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  • “The rule in question, known as Bredt’s rule in textbooks, was reported in 1924. It states that molecules cannot have a carbon-carbon double bond at the ring junction of a bridged bicyclic molecule, also known as the “bridgehead” position. The double bond on these structures would have distorted, twisted geometrical shapes that deviate from the rigid geometry of alkenes taught in textbooks.
    …A paper published by UCLA scientists in the journal Science has invalidated that idea. They show how to make several kinds of molecules that violate Bredt’s rule, called anti-Bredt olefins, or ABOs, allowing chemists to find practical ways to make and use them in reactions.”









  • Kayday@lemmy.worldtoAsk Lemmy@lemmy.world*Permanently Deleted*
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    2 months ago

    The best tip I can give is to idle on a flat service with the clutch in, and slowly release it until the car starts moving. Your first time, do not touch the gas at all. Once you understand when the clutch “bites”, practice lightly adding some gas to the bite. Once you get the car moving, the rest of the gears are easy by comparison.

    My dad spent a whole Saturday with me as a kid frustrated that I didn’t just “get it”. The next weekend I practiced by myself and did the above method and figured it out in about 15 minutes.