Search

Two new salts, [1-NaMe-2-NH2Py]2[Ni(mnt)2] (1) and [1-NaMe-2-NH2Py]2[Ni(i-mnt)2] (2) ([1-NaMe-2-NH2Py]+ = 1-(1'-naphthylmethyl)-2-aminopyridinium, mnt2- = maleonitriledithiolate, and i-mnt2- = iso-maleonitriledithiolate), have been obtained and characterized by elemental analyses, infrared (IR), ultraviolet (UV), mass spectroscopy (MS), molar conductivities, and single-crystal x-ray diffraction. The results have shown that the change of the ligand from mnt to i-mnt results in differences in the crystal system, space group, weak interactions, and the stacking mode of the cations and anions. The effects of weak interactions such as C--H···N, N-H···N, or C--H···Ni hydrogen bonds and p···π, π···π, and C--H···π stacking interactions generate a three-dimensional (3D) network structure. [ABSTRACT FROM AUTHOR]

Two new Ni(II) complexes, [4RBzTPP]2[Ni(i-mnt)2] (i-mnt = isomaleonitriledithiolate, [4RBzTPP]+ = 1-(4'-R-benzyl)triphenylphosphinium; R = Br(1) and CN(2)), were obtained in the crystalline form by the reaction of K2(i-mnt), NiCl2·6H2O and 1-(4'-R-benzyl)-triphenylphosphinium bromide in H2O. Both complexes crystallize in the triclinic system and the central Ni(II) ion has a distorted square planar coordination. Some weak hydrogen bonds, such as C-H···S, C-H···N, or C-H···Ni, observed between the [Ni(i-mnt)2]2- anion and the cation, play important roles in the stacking of the molecules, and give rise to a 3D network structure. [ABSTRACT FROM AUTHOR]

An ionic pair complex, [FClBzDMAP]2[Pd(mnt)2] (1) , ([FClBzDMAP]+ = [1-(4'-fluoro-2'-chlorobenzyl)-4-dimetylamino pyridinium, mnt2- = maleonitriledithiolate), was synthesized and characterized by elemental analyses, IR, UV-vis spectra, molar conductivities and single crystal diffraction. The crystal belongs to the triclinic system, space group P-1 with cell constants a = 8.3472(8) Å, b = 9.3988(9) Å, c = 13.5875(14) Å, α = 76.676(1)°, β = 86.036(1)°, γ = 71.182(1)°, Z = 1. It is interesting that the [FClBzDMAP]+ cations (C) and the [Pd(mnt)2]2- anions (A) in 1 stack into a 1D alternating CC-A-CC-A-CC column along ab direction, while the cations form a 1D column along bc direction. Some weak interactions such as p ... π, π ... π, Cl ... S, and C─ H ... N interactions in the crystal play important roles in the self-assembly process and give rise to a 3D network structure. [ABSTRACT FROM AUTHOR]

A new ion-pair complex, [BzTPP]2[Ni(i-mnt)2](1) (i-mnt2- = iso-maleonitriledithiolate, [BzTPP]+ = benzyltriphenylphosphinium) was synthesized and characterized by elemental analysis, IR, UV, EI-MS spectra and single crystal X-ray diffraction. The single-crystal structural analysis shows that 1 crystallizes in the triclinic space group P-1, with a = 9.466(1) Å, b = 10.196(1)Å, c = 29.252(3)Å, α = 99.28(1)ˆ, β = 93.96(1)ˆ, γ = 106.34(1)ˆ, V = 2654.3(4)Å3, Z = 2. The Ni(II) ions of the [Ni(i-mnt)2]2 - anion adopted a square-planar coordination geometry. Four weak C─H...N hydrogen bonds between the anions and the cations observed in the crystal give further rise to a 3D structure. [ABSTRACT FROM AUTHOR]