Dimeric capsules formed by tetra-CMPO derivatives of (thia)calix[4]arenes.

Thiacalix[4]arene 2, calix[4]arene 3a and its tetraether fixed in the cone conformation 3b form homo- and heterodimeric capsules in apolar solvents, which are held together by a seam of NH...

Hydrogen-bonded dimers of a thiacalixarene substituted by carbamoylmethylphosphineoxide groups at the wide rim.

A thiacalix[4]arene derivative bearing four carbamoylmethylphosphineoxide groups at the wide rim forms hydrogen-bonded, dimeric capsules with S8 symmetry in the crystalline state and in apolar solvents, where the inclusion of cationic guests could be proved by 1H NMR and ESI mass spectra.

Unusual conformations of 1,3-dialkoxythiacalix[4]arenes in the solid state.

The structures of three syn-1,3-dialkoxythiacalix[4]arenes with unusual conformations in the solid state are reported. The pinched cone conformation of syn-2(2),4(2)-dihydroxy-1(2),3(2)-bis(prop-2-enyloxy)thiacalix[4]arene, C30H24O4S4, (3a), is stabilized by two intramolecular hydrogen bonds, remarkably formed from both OH groups to the same ether O atom. In syn-2(2),4(2)-dihydroxy-1(5),2(5),3(5),4(5)-tetranitro-1(2),3(2)-bis(prop-2-enyloxy)thiacalix[4]arene acetone disolvate, C30H20N4O12S4.