different between thionine vs thiocine

English

Of Ancient Greek origin. See thio- (“sulfur”).

thionine (countable and uncountable, plural thionines)

(chemistry) An artificial red or violet dyestuff consisting of a complex sulfur derivative of certain aromatic diamines.
(organic chemistry) The unsaturated nine-membered heterocycle having eight carbon atoms, one sulfur atom and four double bonds.

thiocine (plural thiocines)

(organic chemistry) An unsaturated eight-membered heterocycle having seven carbon atoms, one sulfur atom and three double bonds

The analogous compounds with two, and one double bonds are termed tetrahydro- and dihydro- thiocines.
The analogous saturated compound is thiocane

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