2-[(4-Meth­oxy­benz­yl)imino­meth­yl]phenol

In the title Schiff base compound, C15H15NO2, prepared from 4-meth­oxy­benzyl­amine and salicyl­aldehyde, an intra­molecular O—H⋯N hydrogen bonds influences the mol­ecular conformation; the two aromatic rings form a dihedral angle of 73.5 (1)°. In the crystal, weak inter­molecular C—H⋯O inter­actions link the mol­ecules into chains propagating in [010]

Salicyl­aldehyde–4-(dimethyl­amino)­pyridine (1/1)

In the title compound, C7H10N2·C7H6O2, the components are linked by an O—H⋯N hydrogen bond. The mean planes of two mol­ecules form a dihedral angle of 78.68 (5)°. The crystal packing exhibits weak non-classical C—H⋯O contacts

Acanthoic acid

The title compound [systematic name: (1R,4aR,7S,8aS,10aS)-1,4a,7-trimethyl-7-vinyl-1,2,3,4,4a,6,7,8,8a,9,10,10a-dodeca­hydro­phenanthrene-1-carb­oxy­lic acid], C20H30O2, is a pimarane-type diterpene extracted from Croton oblongifolius. There are two independent mol­ecules in the asymmetric unit. In both of these, the six-membered rings A, B and C adopt chair, boat and half-chair conformations, respectively. Rings A and B are trans-fused. The two mol­ecules in the asymmetric unit form O—H⋯O hydrogen-bonded R 2 2(8) dimers. The absolute configuration was assigned on the basis of the published literature on analogous structures

Synthesis and Reactivity of Nitrogen Nucleophiles-Induced Cage-Rearrangement Silsesquioxanes

Novel phthalimide and <i>o</i>-sulfobenzimide-functionalized silsesquioxanes were successfully synthesized via nucleophilic substitution reactions from octakis­(3-chloropropyl)­octasilsesquioxane. Surprisingly, the formation of deca- and dodecasilsesquioxanes cages was discovered during substitution with phthalimide, but only octasilsesquioxane maintained a cage in the <i>o</i>-sulfobenzimide substitution reaction. Moreover, we report the electronic effect of nitrogen nucleophiles to promote cage-rearrangement of inorganic silsesquioxane core for the first time. Structures of products were confirmed by ¹H, ¹³C, and ²⁹Si NMR spectroscopy, ESI–MS analysis, and single-crystal X-ray diffraction