Tashev, EmilTosheva, TantaShenkov, StoychoChauvin, Anne-SophieLachkova, VictoriaPetrova, RosicaScopelliti, RosarioVarbanov, Sabi2012-07-042012-07-042012-07-04200710.1080/10610270601105703https://infoscience.epfl.ch/handle/20.500.14299/83433WOS:000251757200002The synthesis and characterization of several new phosphorus-containing partially lower rim substituted derivatives of 5,11,17,23-tetra(t-butyl) calix(4)arene (1) and 5,11,17,23-tetra(t-octyl)calix(4)arene (II), namely 5,11,17,23-tetra(t-butyl)-25,27-dihydroxy-26,28-bis(diphenylphosphinoyl-oxy) calix(4)arene (IV); 5,11,17,23-tetra(t-butyl)-25-hydroxy-26,27,28-tris(tetramethyldiamido- phosphinoyl-oxy) calix(4)arene (Vb); 5,11,17,23-tetra(t-butyl)-25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl- methoxy) calix(4)arene (VI); 5,11,17,23-tetra (t-octyl)25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl-methoxy) calix(4)arene (VII) are reported. The structure of the synthesized calix(4)arene derivatives are identified and confirmed by elemental analysis, IR, H-1, C-13, P-31(H-1) NMR spectroscopy and mass spectrometry as and X-ray crystallographic analysis of 5,11,17,23-tetra(t-butyl)25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl-methoxy) calix(4)arene VI. According to the NMR spectra, all calix(4)arenes are in cone conformation.calix(4)arenesphosphorus containing calixarenesphosphine oxidetetra(t-octyl) calix(4)areneX-ray analysisNMR-spectroscopyX-RayMetal-ComplexesCalix<4>ArenesPolymerLigandsIonsConformationMacrocyclesAbilityOxidestext::journal::journal article::research article