Jicli José Rojas

3,3′-Ethyl­enebis(3,4-dihydro-6-chloro-2H-1,3-benzoxazine)

The asymmetric unit of the title compound, C18H18Cl2N2O2, contains one half of an independent molecule, the other half being generated via a centre of inversion at the molecular centroid. In the crystal structure, molecular chains are formed through non-classical C—H⋯ O hydrogen bonds between an axial H atom of the oxazine ring and the O atom of a neighbouring molecule.

Crystal structure of the co-crystalline adduct 1,3,6,8-tetra­aza­tri­cyclo­[4.4.1.13,8]dodecane (TATD)–4-bromo­phenol (1/2)

The first crystal structure determination of a 1:2 co-crystalline adduct of 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane is presented. In the crystal, adducts are linked by C—H⋯O and C—H⋯Br hydrogen bonds, forming a two-dimensional network.

Crystal structure of 1,2-bis­(6-bromo-3,4-dihydro-2H-benz[e][1,3]oxazin-3-yl)ethane: a bromine-containing bis-benzoxazine

The solid-state structure of a 4-bromobenzoxazine has been determined. The whole molecule of the title compound is generated by inversion symmetry. This is a potential benzoxazine monomer for the preparation of phenolic materials.

Crystal structure and C-H...F hydrogen bonding in the fluorinated bis-benzoxazine : 3,3'-(ethane-1,2-di­yl)bis­(6-fluoro-3,4-di­hydro-2H-1,3-benzoxazine)

The packing of the title benzoxazine derivative features C—H⋯F hydrogen bonds, which form a sheet structure further linked via weak C—H⋯π hydrogen bonds.

Crystal structure of the 1:2 co-crystal of 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecane (TATU) and 4-chlorophenol (1/2)

The components of the ternary co-crystalline adduct are linked by intermolecular O–H⋯N hydrogen bonds.

Mechanochemical synthesis and crystal structure of a 1:2 co-crystal of 1,3,6,8-tetra­aza­tri­cyclo[4.3.1.13,8]undecane (TATU) and 4-chloro-3,5-dimethyl­phenol

In the crystal, the 1:2 co-crystalline adducts are linked by π–π stacking interactions.

Crystal structure of 1,1′-[imidazolidine-1,3-diylbis(methyl­ene)]bis­(naphthalen-2-ol)

The crystal structure of the title compound displays a twist conformation of the imidazolidine ring with two (2-hydroxynaphthalen-1-yl)methyl substituents stabilized by two intramolecular O—H⋯N hydrogen bonds.

Crystal structure of the co-crystalline adduct 1,3,6,8-tetra­aza­tri­cyclo­[4.4.1.13,8]dodecane (TATD)–4-chloro-3,5-di­methyl­phenol (1/1)

In the crystal of the title co-crystalline adduct, the 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD) and 4-chloro-3,5-dimethylphenol are linked by intermolecular O—H⋯N hydrogen bonds and C—H⋯π interactions.

4,4'-Dibromo-2,2'-{ethane-1,2-diylbis[(methyl-imino)-methyl-ene]}diphenol.

The asymmetric unit of the title compound, C18H22Br2N2O2, contains one half-molecule that is related to the other half by a center of inversion located at the mid-point of the central C—C bond. The hydroxy (phenolic) groups are linked to the N atoms by O—H⋯N hydrogen bonds, which generate S(6) rings.

C—I⋯N short contacts as tools for the construction of the crystal packing in the crystal structure of 3,3′-(ethane-1,2-di­yl)bis­(6-iodo-3,4-di­hydro-2H-1,3-benzoxazine)

The packing of the title compound features short C—I⋯N contacts.