Alkanediyl bridged calix[4]arenes: Synthesis, conformational analysis, and rotational barriers

Keyphrases

• Arene Synthesis 100%
• Rotational Barrier 100%
• Cone Conformation 100%
• Conformational Analysis 100%
• Cis-isomer 100%
• Calix 100%
• Arenes 66%
• Cone Ring 66%
• Ring Inversion 66%
• Methylene Bridge 66%
• Calixarene 66%
• Conformational Equilibrium 66%
• Alkyl Group 66%
• Aryl Groups 66%
• Aryl Substituents 33%
• Energy Barrier 33%
• Axial Position 33%
• Energy Difference 33%
• 1H NMR Spectroscopy 33%
• Activation Free Energy 33%
• Fragment Condensation 33%
• Ethyl 33%
• Solution Conformation 33%
• Solvent Dependence 33%
• Isopropyl 33%
• Alkyl Substituent 33%
• Molecular Mechanics Calculations 33%
• Tert-butyl 33%
• Diastereomers 33%
• Methyl 33%
• Single Crystal X-ray Structure 33%
• Molecular Conformation 33%
• Trans Isomers 33%

Chemistry

• Cis Isomer 100%
• Rotational Barrier 100%
• Calix[4]arene 100%
• Diastereomer 100%
• Calixarene 66%
• Alkyl Group 66%
• Ring Inversion 66%
• Aryl Group 66%
• Carbene 66%
• Condensation 33%
• Energy Barrier 33%
• Molecular Mechanics Calculation 33%
• Trans Isomer 33%
• Conformational Isomer 33%
• Ethyl 33%
• 1H NMR Spectroscopy 33%
• Free Energy of Activation 33%
• Single Crystalline Solid 33%