Two N,N′-diaryl-2,2,2-trichloro­ethane-1,1-diamines: hydrogen-bonded supra­molecular structures in one and two dimensions

The mol­ecules of 2,2,2-trichloro-N,N′-diphenyl­ethane-1,1-diamine, C₁₄H₁₃Cl₃N₂, are linked into (040) sheets by a combination of C—H...Cl and C—H...π(arene) hydrogen bonds. In 2,2,2-trichloro-N,N′-bis­(4-methyl­phen­yl)ethane-1,1-diamine, C₁₆H₁₇Cl₃N₂, the mol­ecules are linked into C(7) chains by two independent C—H...Cl hydrogen bonds and one Cl...Cl contact.

Two substituted 2-pyrrolin-5-ones: chains built from a single N—H...O hydrogen bond

In each of methyl 2-methyl-5-oxo-2-pyrroline-3-carboxyl­ate, C₇H₉NO₃, and 3-acetyl-2-methyl-2-pyrrolin-5-one, C₇H₉NO₂, the pyrrolinone ring is planar. In each structure, mol­ecules are linked into simple chains by way of a single N—H...O hydrogen bond.

Hydrogen-bonded chains in 2,2,2-trichloro-N,N′-bis­(4-methoxy­phenyl)­ethane-1,1-diamine and a three-dimensional hydrogen-bonded framework in 2,2,2-trichloro-N,N′-bis­(4-chloro­phenyl)­ethane-1,1-diamine

In 2,2,2-trichloro-N,N′-bis­(4-methoxy­phenyl)­ethane-1,1-di­amine, C₁₆H₁₇Cl₃N₂O₂, mol­ecules are linked into helical chains by N—H...O hydrogen bonds. Mol­ecules of 2,2,2-trichloro-N,N′-bis­(4-chloro­phenyl)­ethane-1,1-diamine, C₁₄H₁₁­Cl₅N₂, are connected into a three-dimensional framework by two independent Cl...Cl inter­actions and one C—H...Cl hydrogen bond.