Two blue thermally activated delayed fluorescence molecules based on bis(phenylsulfonyl)benzene with very small singlet-triplet splitting energy were designed and synthesized by combining 3,6-di-tert-butylcarbazole with 1,4-bis(phenylsulfonyl)benzene and 1,3-bis(phenylsulfonyl)benzene, and a maximum external quantum efficiency of 11.7% was achieved for an electroluminescent device.

A simple monocyclic 8n electron thiepin, 2,7-di-tert-butyl-4-ethoxycarbonyl-5-methylthiepin (13) stabilized by two bulky tert-butyl groups at 2and 7-positions, was synthesized from 2,6-di-tert-butyl-4-methylthiopyrylium tetrafluoroborate (11). In spite of of its monocyclic thiepin structure, the compound 13 showed remarkable thermal stability and had a half-life of 7.1 h at 130 °C. Judging from...

The title compound, C26H40N2O2, has both its N atoms in trigonal-pyramidal geometries. The mol-ecular structure is stabilized by O-H⋯N and C-H⋯O hydrogen bonds. In the crystal, C-H⋯π inter-actions lead to the formation of a supramolecular helical chain along the b-axis direction.

The title compound, C(16)H(26)O(2), was easily obtained in high yield when 4-bromo-methyl-2,6-di-tert-butyl-phenol was reacted with methanol. There are two independent mol-ecules in the asymmetric unit. The meth-oxy group in each of the independent mol-ecules was found to be disordered, with site-occupation factors of 0.8728 (18)/0.1272 (18) and 0.8781 (17)/0.1219 (17).

The structure of the title compound, C(11)H(19)NO(4), contains two crystallographically independent mol-ecules in the asymmetric unit. Both adopt the same conformation and they form pseudosymmetric R(2) (2)(8) dimers via two N-H⋯O hydrogen bonds. The dimers are linked by weak C-H⋯O inter-actions and are stacked in columns along the a axis.

The oligomerisation of tert-butylphosphaalkyne, tBuC[triple bond, length as m-dash]P, mediated by Cu(I) complexes yields an unprecedented C4P5 cage compound, which is stabilised in a matrix of copper(I) iodide.

This study describes asymmetric Mannich-type additions between C-5 lithiated thiazolo[3,2-b][1,2,4]triazoles and enantiomerically pure (SS)-N-tert-butanesulfinyl-(3,3,3)-trifluoroacetaldimine. Under the optimized conditions, these reactions proceed with good (up to 78%) chemical yields and virtually complete (98 : 2 to >99 : 1 dr) diastereoselectivity. The same stereochemical outcome was obtain...

The synthesis 2-tert-butyl-4-methylphenol is of great significance because its wide application in industry, and the development a highly efficient catalyst necessary for alkylation p-cresol tert-butyl alcohol. Here, an mild method was established. Caprolactam chosen as hydrogen-bonding acceptor; p-toluenesulfonic acid employed donor, deep eutectic solvent (DES) prepared to catalyze reaction. s...