N,N′-Bis[2-(dimethyl­amino)eth­yl]dithio­oxamide

In the title compound, C₁₀H₂₂N₄S₂, mol­ecules lie across crystallographic inversion centres. Weak N—H...N and N—H...S hydrogen-bonding inter­actions are observed in the mol­ecular structure.

N,N′-Bis[2-(2-pyrid­yl)eth­yl]dithio­oxamide

The title compound, C₁₆H₁₈N₄S₂, has a crystallographic inversion centre at the mid-point of the central C—C bond. The plane of the dithio­oxamide fragment is approximately perpendicular to the plane of the dimethyl­ene bridge [dihedral angle = 84.8 (1)°], the plane of which is in turn normal to the pyridine ring plane [dihedral angle = 89.80 (8)°]. An inter­molecular N—H...N hydrogen bond involving the amide NH group and the pyridine N atom [N...N = 3.0503 (18) Å and N—H...N = 145.8 (14)°] links the mol­ecules into chains extending along the c axis.

2,2′-(1,4-Phenyl­enedivinyl­ene)diquinolin-8-ol

The title compound, C₂₈H₂₀N₂O₂, has a crystallographic inversion centre, and an intra­molecular O—H...N hydrogen bond may have an effect on some bond lengths and angles.

N,N′-Bis[2-(diethyl­amino)eth­yl]dithio­oxalamide

In the title compound, C₁₄H₃₀N₄S₂, the mol­ecules lie about crystallographic inversion centres. A weak N—H...S hydrogen-bonding inter­action is observed in the crystal structure.

N,N′-Bis(3-dimethyl­amino­prop­yl)dithio­oxamide

Mol­ecules of the title compound, C₁₂H₂₆N₄S₂, have 2/m symmetry. Intra­molecular N—H...N and N—H...S hydrogen bonds are observed.