trans-Tetrakis(1-allyl-1H-imidazole-κN³)bis(thiocyanato-κN)nickel(II)

Abstract

The structure of the title compound, [Ni(NCS)2(C6H8N2)4], consists of isolated mol­ecules of [Ni(NCS)2(Aim)4] (Aim = 1-allyl­imidazole), which contain a distorted octa­hedral NiN6 chromophore. The NCS− anions are trans and four N atoms from the 1-allyl­imidazole ligands define the equatorial plane. The mean Mn—N(Aim) and Mn—N(NCS) distances are 2.105 (2) and 2.098 (2) Å, respectively. Weak C—H⋯N inter­actions contribute to the crystal packing stability.

Tetrakis(1-phenyl-1H-imidazole-κN3)bis(thiocyanato-κN)nickel(II)

“…The equatorial plane of the complex is formed by four Ni-N(1-phenyl-1H-imadazole) bonds with lengths from 2.105 (4) to 2.127 (3) Å, and the axial positions are occupied by two N-bonded NCS groups [Ni-N(NCS) = 2.077 (4) or 2.083 (4) Å]. These values agree well with those observed in the related [Ni(NCS) 2 (1-methyl-1H-imidazole) 4 ] (Liu et al, 2005), [Ni(NCS) 2 (1ethyl-1H-imidazole) 4 ] (Liu et al, 2006), [Ni(NCS) (Pang et al, 2007) and [Ni(NCS) (Zheng et al, 2012). The values of the bond angles around nickel atoms are close to those expected for a regular octahedral geometry, the N-Ni-N angles range from 87.85 (13) to 92.15 (13) °, and the thiocyanate ligands are almost linear.…”

Tetrakis{1-[4-(1H-imidazol-1-yl-κN3)phenyl]ethanone}bis(isothiocyanato-κN)nickel(II)

“…The molecular structure of the title compound is shown in Fig. 1 (Liu, et al, 2005), [Ni(NCS) 2 (1-ethyl-1H-imidazole) 4 ] (Liu, et al, 2006), (Pang, et al, 2007), and [Ni(NCS) 2 (1-allyl-1H-imidazole) 4 ] (Zheng, et al, 2012)…”