Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 8 (August 2002)

Acta Cryst. (2002). C58, o477-o479 [doi:10.1107/S0108270102011083]

11-Methyl-12a-phenyl-9a,12a-dihydrophenanthro[9',10':5,6][1,4]dioxino[2,3-d]oxazole and 9a-(10-hydroxyphenanthren-9-yl)-11,12a-diphenyl-9a,12a-dihydrophenanthro[9',10':5,6][1,4]dioxino[2,3-d]oxazole

A. Usman, I. A. Razak, H.-K. Fun, S. Chantrapromma, Y. Zhang and J.-H. Xu

Abstract: In the title compounds, C₂₄H₁₇NO₃, (I), and C₄₃H₂₇NO₅, (II), the dioxine ring is not planar and tends toward a boat conformation. The oxazoline ring adopts a twisted conformation in molecule (I) but is essentially planar in molecule (II). The configuration of the dioxine-oxazoline system is determined by the sp³ state of the two shared atoms. The phenanthrene moiety is nearly coplanar with the dioxine ring, while the phenyl ring is perpendicular to the attached oxazole ring. The triclinic unit cell of (II) contains two crystallographically independent molecules related by a pseudo-inversion centre.

Formula: C₂₄H₁₇NO₃ and C₄₃H₂₇NO₅

Online 12 July 2002


	Structure factor file (CIF format) (88.4 kbytes) Contains datablock I

	Structure factor file (CIF format) (712.4 kbytes) Contains datablock II

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