Crystal and molecular structure of cis- and trans-2,4-dihydroxy-2,4-dimethylcyclohexanetrans-1-acetic acid γ-lactone

✍ Scribed by Michal W. Wieczorek; Wieslaw Majzner; Magdalena Sikora; Józef Kula

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 531 KB
• Volume: 6
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.520060607

✦ Synopsis

During the transformation process of lirnonene to tetrahydrofuran derivatives, the title compounds (*)- (4) have been obtained as crystalline products and subjected to X-ray analysis. The crystals of trans-( 4) are orthorhombic, space group P212,21, with the lattice constants a = 7.0445(5) A, b = 10.0908(4) A, c = 14.0309(6) 1 ; the absolute configuration at atoms Cl, C2, and C4 is Rcl, S , , and R,, respectively. The isomeric form cis-(4) crystallizes in the monoclinic system, space group P2,, with the following unit-cell parameters: a = 10.8275(4) A, b = 8.6994(5) A, c = 16.4722(6) 1, p = 106.515(3)9 The asymmetric part of the unit cell o f cis-(4) contains three independent molecules. Each o f these three molecules has the identical absolute configuration at all centers of chirality: