trans-butenedioic acid

trans-butenedioic acid,

IUPAC name for fumaric acidfumaric acid
or trans-butenedioic acid,
HO2CCH=CHCO2H, unsaturated dicarboxylic acid that melts at 287&degC;. Maleic acid, or cis-butenedioic acid, is a geometric isomer of fumaric acid; it melts at about 140&degC;.
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