Publication Date

6-1984

Abstract

Mr = 246·3, monoclinic, P21, a = 7·804 (3), b = 18·248 (8), c = 8·752 (5) Å, β = 99·59°, V = 1233 Å3, Z = 4 (2 molecules/asymmetric unit), Dx = 1·33 g cm-3, λ(Mo Kα) = 0·71067 Å, μ = 0·91 cm,-1, F(000) = 520, T = 293 K. Final R = 0·066 for 1123 observed independent intensities. The structure consists of diastereomers approximately inversionrelated through a pseudocenter of symmetry at x = 0·241 (4), z = 0·281 (3) except the 4-methyl groups. The dihydropyran rings are half chairs distorted towards the eƒ-diplanar conformation. Like molecules are hydrogen-bonded between hydroxyl and carbonyl groups along a, O···O distances being 2·781 (7) (trans) and 2· 780 (7) Å (cis).

Subjects

Conformation; Molecular structure; Diastereoisomers

Publication Information

Copyright 1984 International Union of Crystallography. The original published version of this article may be found at http://dx.doi.org/10.1107/S0108270184006818.

DOI

10.1107/S0108270184006818

Document Type

Journal Article

Included in

Chemistry Commons

Share

COinS