The gas-phase recognition of native amino acids and the conformational properties of three glucosylthioureidocalix[4]arenes () were studied theoretically and experimentally using ab initio calculations, ESI-FTICR,(1)H and (13)C NMR MS. The conformational and complexation properties of the glucocalixarenes were dependent on the number of glucose units at the upper rim and the length of the alkyl...

The chemistry of calixarenes has received increasing attention in the field of Supramolecular Chemistry, as this class of molecules offers a suitable platform for the synthesis of receptors for anions, cations and neutral molecules. Their structures allow acylation and alkylaton reactions of the phenolic groups. The conformation and degree of substitution of acylated products are related to the...

The survey depicts the combination of large-scale monodentate phosphites in response to PCl3/NEt3 with p-tert-butyl calix[4]-(OH)3-OR, where R contains an oxygen-containing substituent (R = CH2P(O)Ph2, -CH2CO2Et, -CH2C(O)NEt2, -CH2CH2OMe). These funnel-shaped calissarenes have a phosphorus particle bridging three phenolic oxygen atoms, and are incredibly steady NaOH-aqueous arrangement due cone...

In this research, Quantum-mechanical calculations were performed at the HF method with the 6-31+G*basis set and at the B3LYP method with the 6-31+G* basis set in the gas phase and five solvents such as water, DMSO, methanol, ethanol and dichloromethane at six temperatures. According to these theoretical results of IR, we extracted thermo chemical parameters such as enthalpy (∆H Kcal/mol), Gibbs...

• Metallocalix[ n ]arene complexes as catalysts in numerous catalytic reactions. The presence of the calixarene cavity allows for enhanced enantioselectivity. Cross-coupling, olefin oxidation and polymerization processes are most studied. Increased attention to ROP cyclic esters produce biodegradable polymers. Large flexible calix[ ]arenes can adapt energy requirements a process. Aside from the...