Isatropic Acid
Structural Formula Vector Image
Title: Isatropic Acid
CAS Registry Number: 596-56-5
CAS Name: 1,2,3,4-Tetrahydro-1-phenyl-1,4-naphthalenedicarboxylic acid
Additional Names: 1-phenyltetrahydro-1,4-naphthalenedicarboxylic acid; 1-phenyltetralin-1,4-dicarboxylic acid; diatropic acid; a-isatropic acid; trans-isatropic acid
Molecular Formula: C18H16O4
Molecular Weight: 296.32
Percent Composition: C 72.96%, H 5.44%, O 21.60%
Literature References: Prepn: Staudinger, Ruzicka, Ann. 380, 296 (1911); Smith, Forsberg, C.A. 42, 7283 (1948). Structure: Voigtlander, Engelbert, Ann. 625, 196 (1959).
Derivative Type: dl-Form
Properties: Crystals from chloroform + petr ether, mp 238.5-239°. Sparingly sol in hot water; moderately sol in alcohol, acetic acid; practically insol in ether, benzene, ligroin, carbon disulfide.
Melting point: mp 238.5-239°
Derivative Type: d-Form
Properties: Crystals, sinters at 234°, dec at 230°. [a]D20 +9.44° (1 g/15 ml abs alc). K at 18° = 1.20´10-4. Soly in water 0.0047%.
Optical Rotation: [a]D20 +9.44° (1 g/15 ml abs alc)
Status: This monograph has been retired and is no longer subject to revision or update.

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