Richter, Reinhard H. Dow Chemical U.S.A., North Haven Laboratories, North Haven, Connecticut.
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A member of a class of organic compounds with the CCO group as a common structural element. Ketenes are derivatives of carboxylic acids, from which they are (hypothetically) formed by abstraction of water; they can therefore be considered to be inner anhydrides of acids, as opposed to the common carboxylic acid anhydrides formed from two molecules of a carboxylic acid. An example is the formation of ketene and acetic anhydride from acetic acid [reactions (1) and (2)].
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