4-[2-(4-Chloro­phen­yl)ethen­yl]-N-methyl­pyridinium tetra­phenyl­borate

The cation of the title compound, C₁₄H₁₃NCl⁺·B(C₆H₅)₄⁻, has a cis configuration at the C=C double bond. The pyridyl ring makes a dihedral angle of 53.8 (4)° with the benzene ring. Each cation is paired with another related by a twofold rotation through a π–π inter­action and the cations also inter­act through a weak C—H...Cl inter­action. The crystal structure is further stabilized by C—H...π inter­actions.

6-Bromo-1'-ethyl-4-(1-ethyl-3,3-dimethyl-1H-indolin-2-ylidenemeth­yl)-3',3'-dimethyl­spiro­[3,4-dihydro-2H-1-benzopyran-2,2'(3'H)-1'H-indoline], a dicondensed spiro­pyran

The title mol­ecule, C₃₃H₃₇N₂O, as a dicondensed spiro­pyran (DC), contains a benzopyran and two indoline ring systems. Each of the three systems is nearly planar. While both indolines are almost perpendicular to the benzopyran, they make a dihedral angle of 33.6 (4)° with each other. The two chiral C atoms have the same chirality (RR or SS).