2020-12-21 20:32 In chemistry, isomers are molecules or polyatomic ions with identical chemical formulas but distinct arrangements of atoms in space. Isomers do not necessarily share similar properties. Two main forms of isomerism are structural isomerism (or constitutional isomerism, in which bonds differ) and stereoisomerism (or spatial isomerism, in which the orientations of atoms differ). A molecule often has many conformations, each with different energy. In the equilibrium state, the proportions of various conformations are also different.
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