One-dimensional System of Square-planar Bis(1,2-dicyanovinylene-1,2-dithiolato)metal Complexes. I. The Crystal Structure of [(C4H9)4N]2[Ni(mnt)2] and [(C2H5)4N][Ni(mnt)2]

Abstract

X-Ray crystal structure analyses of [(C4H9)4N]2[Ni(mnt)2] (I) and [(C2H5)4N][Ni(mnt)2] (II) {mnt: 1,2-dicyanovinylene-1,2-dithiolato C4N2S22−} have been carried out from the viewpoint of one-dimensional system. Crystals of (I) belong to triclinic system: a=12.360(6), b=11.138(12), c=9.833(9) Å, α=118.43(9), β=92.05(6), γ=91.91(6)°, space group P\bar1 with Z=1. The compound (II) forms monoclinic crystals, P21/a: a=20.018(18), b=16.079(9), c=7.118(6) Å, β=110.43(6)°, Z=4. Both structures, solved by the heavy-atom method, have been refined anisotropically by least-squares procedure to R=0.049 and 0.050 for (I) and (II), respectively. The bond distances of diamagnetic Ni(mnt)22− anion and paramagnetic Ni(mnt)21− anion are compared. A columnar structure was found in the structure of (II). The Ni(mnt)21− ions form a diadic unit, that is a repeating unit of two anions, within the columns. The electrical conductivity data are measured along the direction parallel to the Ni(mnt)21− stacks in the temperature range from room temperature to 373 K. This compound behaves as a semiconductor in this temperature range.

Short Communication: Crystal and molecular structure of tetraethyl-ammonium bis (stilbene 1,2-dithiolato) nickelate(III)

“…C -Ν -C angles range between 105° and 112°, which is as observed in other [(C 2 H 5 ) 4 N] + moieties (Kobayashi and Sasaki, 1977). Brought to you by | New York University Bobst Library Technical Service Authenticated Download Date | 6/20/15 6:18 AM…”

Ion Conduction and Complicated Phase Transition Behaviors in an Organic Ion Plastic Crystal, [Tetra-n-butylammonium]2[Ni(maleonitriledithiolate)2]

“…The crystal structure of 1 was previously reported . In this study, we remeasured its crystal structure again and described simply for better understanding the complicated phase transition behaviors of 1 .…”

Spin-Singlet Transition in the Magnetic Hybrid Compound from a Spin-Crossover Fe(III) Cation and π-Radical Anion

“…The selected bond lengths of the [Ni(mnt) 2 ] molecule for 1 along with the [Ni(mnt) 2 ] monoanion and dianion [30] are listed in Table 3. The mnt ligands were coordinated to a central Ni atom to form a square planar coordination structure.…”

“…5 Dihedral angles between the quinolyl (C8-C16, N2) and phenyl (C1-C6) rings. [30] ref [30] 1 The bond lengths corresponding to the atomic numberings of 1. (Table 4).…”