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rac-(E,trans)-4-Bromo-10,10-dimethyl-9,11-dioxabi-cyclo-[6.3.0]undec-4-ene.

ABSTRACT: In the title compound, a cyclo-octene ring in a twist-boat conformation and a dioxolane ring with a distorted envelope conformation are annulated in a trans configuration. Alternating strands of single enanti-omers build up the crystal. Within the strands, the mol-ecules are connected by weak C-H⋯O hydrogen bonds.

SUBMITTER: Schollmeyer D

PROVIDER: S-EPMC9462276 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature

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rac-(E,trans)-4-Bromo-10,10-dimethyl-9,11-dioxabi-cyclo-[6.3.0]undec-4-ene.

Schollmeyer Dieter D Heidrich Maximilian M Detert Heiner H

IUCrData 20200930 Pt 9

In the title compound, a cyclo-octene ring in a twist-boat conformation and a dioxolane ring with a distorted envelope conformation are annulated in a trans configuration. Alternating strands of single enanti-omers build up the crystal. Within the strands, the mol-ecules are connected by weak C-H⋯O hydrogen bonds. ...[more]

PMID: 36338907

Similar Datasets

(1S,3S,8R,9S,11R)-10,10-Di-bromo-3,7,7,11-tetra-methyl-tetra-cyclo-[6.5.0.0(1,3).0(9,11)]trideca-ne.

Project description:The title compound, C17H26Br2, was synthesized from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The asymmetric unit contains two independent mol-ecules with similar conformations. Each mol-ecule is built up from fused six- and seven-membered rings and two appended three-membered rings. In both mol-ecules, the six-membered ring has a screw boat conformation, whereas the seven-membered ring displays a boat conformation. No specific inter-molecular inter-actions were discerned in the crystal packing.

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10,10-Dimethyl-anthrone.

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(1S,3R,8R,9S,11R)-2,2-Di-bromo-10,10-di-chloro-3,7,7,11-tetra-methyl-tetra-cyclo-[6.5.0.0(1,3).0(9,11)]trideca-ne.

Project description:The title compound, C17H24Br2Cl2, was synthesized from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The mol-ecule contains fused six-, seven- and two three-membered rings. The six-membered ring has a half-chair conformation, while the seven-membered ring displays a boat conformation. The absolute structure was unambiguously established from anomalous dispersion effects. The crystal packing exhibits no short inter-molecular contacts.

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2,2'-Dimethyl-2,2'-(m-phenyl-ene-dimethyl-ene)propane-dinitrile.

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