2-Nitro-3,4,4-trichloro-1-mono(ethylthio)-1-mono[1-(diphenylmethyl)-piperazine]-1,3-butadiene compound

4-Nitro­phenol–piperazine (2/1)

In the title adduct, C6H5NO3·0.5C4H10N2, the piperazine ring possesses inversion symmetry and has a chair conformation. Its mean plane makes a dihedral angle of 65.45 (7)° with the 4-nitro-phenol ring. In the crystal, the piperazine ring is linked to two 4-nitro-phenol mol-ecules via O-H⋯N hydrogen bonds. The mol-ecules are also linked via bifurcated N-H⋯(O,O) hydrogen bonds involving the NO2 O...

6-Bromo-2-naphthol–piperazine (2/1)

In the title compound, 2C(10)H(7)BrO·C(4)H(10)N(2), the piperazine (pip) mol-ecule displays a chair conformation and is linked to two mol-ecules of 6-bromo-2-naphthol (bno) via O-H⋯N hydrogen bonds. Weak N-H⋯O hydrogen bonds from pip to bno mol-ecules result in chains propagating in [100]. The chains inter-act via C-H⋯π inter-actions.

1:1:1-Trichloro-2:2-di-(p-chlorophenyl)ethane (DDT) and rat adipose tissue.

1-(2-Aza­niumyleth­yl)piperazine-1,4-diium trinitrate

In the title salt, C(6)H(18)N(3) (3+)·3NO(3) (-), the piperazine ring adopts a chair conformation and the ethyl-ammonium group is equatorial relative to the piperazine ring, and in an all-trans conformation. In the crystal, strong charge-assisted N-H⋯O hydrogen bonds link the piperazinediium trications and the nitrate anions into a three-dimensional network.

1-Tosyl-4-[2-(trifluoro­meth­yl)benz­yl]piperazine

In the crystal structure of the title compound, C(19)H(21)F(3)N(2)O(2)S, the piperazine ring adopts a chair conformation. The dihedral angles between the mean plane of the piperazine ring and the tosyl and trifluoro-methyl-phenyl rings are 74.52 (3) and 68.30 (2)°, respectively. The sulfonamide N atom deviates from the plane defined by the three attached atoms by 0.327 (1) Å. The crystal struct...