Unusually rigid macrocyclic tris(picolinolato)-4-tert-butylcalix[4]arene: Its intramolecular interaction effect on picolinoylation
Keywords: تعاملات غیرقابل انعطاف; Macrocycles; NMR spectroscopy; Noncovalent interactions; Picolinoylation; Steric hindrance;