Die Molekül-und Kristallstruktur des Bispropylenthioacetals des 2,4-Dioxo-3-1,3,6o-1,3,4,6,9o-1,3tribenzaspiro5.5undecaphanes

摘要

The crystal structure of the Bispropylenthioacetale of 2,4-Dioxo-3-1,3,6u-1,3,4,6,9u-1,3tribenzaspiro-5.5undecaphane has been determined by three-dimensional X-ray data (4312 reflections) and refined to anR-value of 0.035. The cell constants of the triclinic cell (P$$begin{array}{*{20}c} - 1 end{array}$$) are:a=13.598 Å,b=11.195 Å,c=10.280 Å, α=77.21°, β=69.23°, γ=71.51°. The shape of the central benzene ring is found to be chair-like, the two terminal benzene rings b