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Yes, there are lots of substances wich have four C=C double bonds. E.g. there is cycloocta-1,3,5,7-tetraen (C8H8) which is a ring of 8 carbon atoms and 4 double bonds distributed equally in the ring. If you consider the bonds in benzene containing 3 double bonds (some might disagree) then vinyl benzene is another compound with four double bonds. The IUPAC nomenclature meaning "4 double bonds" is "tetraen" (although not every compound with four double bonds necessarily has the fragment "tetraen" in its name. In case the question was "is there a substance where /one carbon atom/ has four different double bonds?" the answer is: No, at least I haven't seen one, and if there were, it would probably have extremely short lifespan and decompose to something less crowded.

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15y ago
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15y ago

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Q: Which substance has four covalent bonds?
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