[1,2-Bis­(diisopropyl­phosphan­yl)ethane-κ2 P,P′]dichloridonickel(II)–9H-carbazole (1/2)

In the title compound, [NiCl2(C14H32P2)]·2C12H9N, the neutral [Ni(dppe)Cl2] complex [dppe is 1,2-bis­(diisopropyl­phosphan­yl)ethane] consists of a tetracoordinated Ni2+ cation and has a crystallographic twofold axis passing through the metal atom and the mid-point of the CH2—CH2 bond of the dppe ligand. The metal atom shows slight tetra­hedral distortion from an ideal square-planar coordination geometry, as reflected in the dihedral angle between NiCl2 and NiP2 planes of 15.32 (2)°. The 9H-carbazole ring system is essentially planar (r.m.s. deviation = 0.022 Å). In the crystal packing, there are two symmetry-related 9H-carbazole mol­ecules between two adjacent NiII complexes, with an angle between the carbazole mean planes of ca 77°

[1,2-Bis­(diisopropyl­phosphan­yl)ethane-κ2 P,P′]dichloridonickel(II)

In the crystal structure of title compound, [NiCl2(C14H32P2)], the NiII atom lies on a twofold rotation axis and shows a slightly distorted square-planar coordination geometry, with a dihedral angle of 10.01 (8)° between the cis-Cl—Ni—Cl and cis-P—Ni—P planes. There is no significant inter­molecular inter­action except very weak C—H⋯Cl inter­actions. The crystal studied was a racemic twin

Crystal structure of 1-mesityl-3-methyl-4-phenyl-1H-1,2,3-triazol-3-ium iodide

In the cation of the title salt, C18H20N3+·I−, the mesityl and phenyl rings are inclined to the central triazolium ring by 61.39 (16) and 30.99 (16)°, respectively, and to one another by 37.75 (15)°. In the crystal, molecules are linked via C—H...I hydrogen bonds, forming slabs parallel to the ab plane. Within the slabs there are weak π–π interactions present involving the mesityl and phenyl rings [inter-centroid distances are 3.8663 (18) and 3.8141 (18) Å]