A methine group or methine bridge is a functional group =CH−. It consists of a carbon bound by one double bond and 2 single bonds, where one of the single bonds is to a hydrogen.
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Hydrocarbons (only C and H) | |
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Only carbon, hydrogen, and oxygen (only C, H and O) | |
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Only one element, not being carbon, hydrogen, or oxygen (one element, not C, H or O) | |
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Other | |
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