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Structure of (2'R*,5S*)-(+/-)-5-(tetrahydro-2'H-pyran-2'-yl)-2(5H)-furanone
H L Ammon1, P DeShong, T A Lessen
1Department of Chemistry and Biochemistry, University of Maryland, College Park 20742.
Acta Crystallographica. Section C, Crystal Structure Communications
|November 15, 1991
Abstract:
C9H12O3, Mr = 168.2, triclinic, P1, a = 5.5385 (6), b = 8.543 (1), c = 10.373 (1) A, alpha = 113.329 (9), beta = 100.78 (1), gamma = 99.82 (1) degree, V = 426.2 (2) A3, Dx = 1.31 g cm-3, Z = 2, Cu K alpha (lambda = 1.54178 A, graphite monochromator), mu = 8.2 cm-1, F(000) = 180, T = 293 K. Final R = 0.036, wR = 0.081 for 1559 reflections with I greater than 3 sigma(I). The relative configurations at the two chiral centers are (S,R). The dihedral angle between the five- and six-membered rings (O1--C4--C5--O3) is 69.9 (1) degree. The tetrahydropyran is in a chair conformation with the furanone ring equatorial.