acid anhydride
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        A type of organic com-pound of general formula RCOOCOR′,where R and R′are alkyl or aryl groups.They are prepared by reaction of an acylhalide with the sodium salt of a carboxylicacid,e. g. :RCOCl+R′COO-Na+ →RCOOCOR′+NaClLike the acyl halides,they are very......（本文共 456 字）     [閱讀本文] >>