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- In-Methylcyclophane abstract "In-Methylcyclophanes are organic compounds and members of a larger family of cyclophanes. These compounds are used to study how chemical bonds in molecules adapt to strain. In-methylcyclophanes in particular have a methyl group in proximity to a benzene ring. This is only possible when both methyl group and ring are attached to the same rigid scaffold. In one In-methylcyclophane molecule this is accomplished with a triptycene frame.This particular compound is synthesed starting from anthracene with a methyl group added to each arene ring (1,8,9-trimethylanthracene). A triptycene compound is formed from a reaction of this anthracene compound with an aryne in a Diels-Alder reaction in isoamyl nitrite. In this synthesis the precursor to the reactive aryne is 2-amino-6-methylbenzoic acid. Next the methyl substituents are functionalized with bromine groups by the photochemical reaction with N-bromosuccinimide or NBS. The final cyclophane is put together by reaction with 1,3,5-tris(mercaptomethyl)benzene with nucleophilic sulfhydryl groups and electrophilic alkyl bromides in a nucleophilic aliphatic Substitution. X-ray crystallography of the tri-sulfone derivative of this cyclophane shows that the methyl group located 289.6 picometers from the center of the benzene ring. The carbon to carbon bond linking the methyl group to the triptycene frame is actually shortened and measures 147.5 to 149.5 pm. The similar bond in the triptycene precursor is 154 pm. Proton NMR analysis shows a chemical shift of 2.52 ppm for the methyl protons compared to that of 3.16 to 3.85 in the anthracene compound. The reason for this anomaly is that the methyl protons are in line with the aromatic ring current of the benzene ring and are therefore severely shielded, an effect similar to the nucleus-independent chemical shift method of analyzing aromaticity.".
- In-Methylcyclophane thumbnail In-methylcyclophane-3D-sticks.png?width=300.
- In-Methylcyclophane wikiPageID "2485859".
- In-Methylcyclophane wikiPageLength "2484".
- In-Methylcyclophane wikiPageOutDegree "34".
- In-Methylcyclophane wikiPageRevisionID "682299814".
- In-Methylcyclophane wikiPageWikiLink Amyl_nitrite.
- In-Methylcyclophane wikiPageWikiLink Anthracene.
- In-Methylcyclophane wikiPageWikiLink Arene.
- In-Methylcyclophane wikiPageWikiLink Aromatic_hydrocarbon.
- In-Methylcyclophane wikiPageWikiLink Aromatic_ring_current.
- In-Methylcyclophane wikiPageWikiLink Aryne.
- In-Methylcyclophane wikiPageWikiLink Benzene.
- In-Methylcyclophane wikiPageWikiLink Bromine.
- In-Methylcyclophane wikiPageWikiLink Category:Organic_compounds.
- In-Methylcyclophane wikiPageWikiLink Chemical_bond.
- In-Methylcyclophane wikiPageWikiLink Chemical_shift.
- In-Methylcyclophane wikiPageWikiLink Cyclophane.
- In-Methylcyclophane wikiPageWikiLink Diels-Alder_reaction.
- In-Methylcyclophane wikiPageWikiLink Diels–Alder_reaction.
- In-Methylcyclophane wikiPageWikiLink Isoamyl_nitrite.
- In-Methylcyclophane wikiPageWikiLink Mechanistic_organic_photochemistry.
- In-Methylcyclophane wikiPageWikiLink Methyl_group.
- In-Methylcyclophane wikiPageWikiLink Molecule.
- In-Methylcyclophane wikiPageWikiLink N-Bromosuccinimide.
- In-Methylcyclophane wikiPageWikiLink NMR.
- In-Methylcyclophane wikiPageWikiLink Nuclear_magnetic_resonance.
- In-Methylcyclophane wikiPageWikiLink Nucleophilic_aliphatic_Substitution.
- In-Methylcyclophane wikiPageWikiLink Nucleophilic_substitution.
- In-Methylcyclophane wikiPageWikiLink Nucleus-independent_chemical_shift.
- In-Methylcyclophane wikiPageWikiLink Organic_compound.
- In-Methylcyclophane wikiPageWikiLink Organic_synthesis.
- In-Methylcyclophane wikiPageWikiLink Parts-per_notation.
- In-Methylcyclophane wikiPageWikiLink Parts_per_million.
- In-Methylcyclophane wikiPageWikiLink Photochemical_reaction.
- In-Methylcyclophane wikiPageWikiLink Picometer.
- In-Methylcyclophane wikiPageWikiLink Picometre.
- In-Methylcyclophane wikiPageWikiLink Proton.
- In-Methylcyclophane wikiPageWikiLink Shielding_(NMR).
- In-Methylcyclophane wikiPageWikiLink Strain_energy.
- In-Methylcyclophane wikiPageWikiLink Substituent.
- In-Methylcyclophane wikiPageWikiLink Sulfhydryl_group.
- In-Methylcyclophane wikiPageWikiLink Sulfone.
- In-Methylcyclophane wikiPageWikiLink Thiol.
- In-Methylcyclophane wikiPageWikiLink Triptycene.
- In-Methylcyclophane wikiPageWikiLink X-ray_crystallography.
- In-Methylcyclophane wikiPageWikiLink File:In-methylcyclophane-3D-sticks.png.
- In-Methylcyclophane wikiPageWikiLinkText "In-Methylcyclophane".
- In-Methylcyclophane hasPhotoCollection In-Methylcyclophane.
- In-Methylcyclophane wikiPageUsesTemplate Template:Reflist.
- In-Methylcyclophane subject Category:Organic_compounds.
- In-Methylcyclophane hypernym Compounds.
- In-Methylcyclophane type ChemicalCompound.
- In-Methylcyclophane comment "In-Methylcyclophanes are organic compounds and members of a larger family of cyclophanes. These compounds are used to study how chemical bonds in molecules adapt to strain. In-methylcyclophanes in particular have a methyl group in proximity to a benzene ring. This is only possible when both methyl group and ring are attached to the same rigid scaffold.".
- In-Methylcyclophane label "In-Methylcyclophane".
- In-Methylcyclophane sameAs m.07h7b6.
- In-Methylcyclophane sameAs Q17134204.
- In-Methylcyclophane sameAs Q17134204.
- In-Methylcyclophane wasDerivedFrom In-Methylcyclophane?oldid=682299814.
- In-Methylcyclophane depiction In-methylcyclophane-3D-sticks.png.
- In-Methylcyclophane isPrimaryTopicOf In-Methylcyclophane.