Search results for "Screw axis"

showing 2 items of 2 documents

4-Methyl-N-(4-methylpyridin-2-yl)-N-(3,4,5,6-tetrahydro-2H-pyran-4-yl)pyridin-2-amine

2016

In the title compound, C17H21N3O, the pyridine rings make a dihedral angle of 84.44 (5)°. In the crystal, a C—H...N interaction forms a chain of molecules propagating along the twofold screw axis.

crystal structureTertiary amine010405 organic chemistryChemistrytertiary amineGeneral MedicineCrystal structureDihedral angle010402 general chemistry01 natural sciences0104 chemical sciencesCrystalCrystallographychemistry.chemical_compoundScrew axisPyridinelcsh:QD901-999pyridinaminepalladium-catalysed arylaminationlcsh:CrystallographyIUCrData
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Crystal structure and absolute configuration of (4S,5R,6S)-4,5,6-trihydroxy-3-methylcyclohex-2-enone (gabosine H)

2017

The absolute configuration of the title compound, determined as 4S,5R,6S on the basis of the synthetic pathway, was confirmed by single-crystal X-ray diffraction. The mol­ecule is formed by a substituted six-membered cyclo­hexene ring adopting an envelope conformation and substituted by carbonyl, methyl and hydroxyl groups. The supra­molecular structure is mainly built by a combination of O—H⋯O and weaker C—H⋯O hydrogen bonds.

crystal structurenatural productStereochemistryCrystal structure010402 general chemistry010403 inorganic & nuclear chemistry01 natural sciencesResearch Communicationschemistry.chemical_compoundChain (algebraic topology)Screw axisPerpendicularGeneral Materials ScienceEnvelope (waves)CrystallographyChemistryHydrogen bondAbsolute configurationGeneral ChemistryMitsunobu inversion reactionCondensed Matter Physics0104 chemical sciencesabsolute configurationCrystallographyQD901-999EnoneActa Crystallographica Section E Crystallographic Communications
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