Crystal structure of (N¹-benzyl-N¹,N²,N²-tri­methyl­ethane-1,2-di­amine-κ²N,N′)di­chloridomercury(II)

The mol­ecular structure of [HgCl₂(C₁₂H₂₀N₂)] is a rare example where the Hg^II atom is bound to a Cl₂N₂ donor set for which the N atoms originate from aliphatic tertiary amine groups.

2-Bromo-5-tert-butyl-N-methyl-N-[2-(methyl­amino)­phen­yl]-3-(1-methyl-1H-benzimidazol-2-yl)benzamide

In the title compound, C₂₇H₂₉BrN₄O, benzimidazole ring system and the amide moiety are planar [r.m.s. deviations = 0.016 (2) and 0.017 (1) Å, respectively]. The mol­ecule adopts a conformation in which the amide linkage is almost perpendicular to the central ring [dihedral angle = 85.79 (8)°], while the benzimidazole ring system makes a dihedral angle of 70.26 (11)° with the central ring. In the crystal, the mol­ecules form dimers through N—H...O hydrogen bonds and C—H...O interactions. These dimers are further linked into zigzag ribbons along [201] by weak C—H...Br inter­actions. As a result of the bulky nature of the mol­ecule, as evidenced by the large dihedral angles between rings, there is little evidence for any π–π inter­actions.

Crystal structure of N¹-benzyl-N¹,N²,N²-tri­methyl­ethane-1,2-diaminium dichloride

In the title mol­ecular salt, C₁₂H₂₂N₂²⁺·2Cl⁻, which was obtained as a by-product in the attempted synthesis of a mercury derivative, the conformation of the N—C—C—N bond in the cation is anti [torsion angle = 175.1 (10)°]. In the crystal, the cations are linked to the anions by N—H...Cl hydrogen bonds, generating ion-triplets. These are linked by numerous weak C—H...Cl inter­actions, generating a three-dimensional network. The structure was refined as an inversion twin.

Crystal structure of 4-bromo-N-(2-bromo-3-nitro­benz­yl)-2-nitro­naphthalen-1-amine

In the title compound, C₁₇H₁₁Br₂N₃O₄, the dihedral angle between the planes of the naphthalene system and the benzene ring is 52.86 (8)°. The nitro substituent and the attached naphthalene system are almost coplanar [dihedral angle = 5.6 (4)°], probably as a consequence of an intra­molecular N—H...O hydrogen bond with the amine group. The nitro substituent attached to the benzene ring is disordered over two sets of sites with occupancies of 0.694 (3) and 0.306 (3). The major component deviates significantly from the ring plane [dihedral angle = 53.6 (2)°]. In the crystal, the mol­ecules are linked into a three-dimensional array by extensive π–π inter­actions involving both the naphthalene and benzene rings [range of centroid–centroid distances = 3.5295 (16)–3.9629 (18) Å] and C—H...O inter­actions involving the methyl­ene H atoms and the phenyl-attached nitro group.