Di-chlorido-bis-[2-(pyridin-2-yl-κ N)-1 H-benzimidazole-κ N 3]nickel(II) monohydrate

Connor S MacNeil; Aloice O Ogweno; Stephen O Ojwach; Paul G Hayes

doi:10.1107/S2414314620000401

Di-chlorido-bis-[2-(pyridin-2-yl-κ N)-1 H-benzimidazole-κ N ³]nickel(II) monohydrate

IUCrdata. 2020 Jan 28;5(Pt 1):x200040. doi: 10.1107/S2414314620000401. eCollection 2020 Jan.

Authors

Connor S MacNeil¹, Aloice O Ogweno², Stephen O Ojwach³, Paul G Hayes¹

Affiliations

¹ Department of Chemistry and Biochemistry, University of Lethbridge, 4401, University Drive Lethbridge, AB, T1K 3M4, Canada.
² Department of Chemistry, South Eastern University of Kenya, Kitui, Kenya.
³ School of Chemistry & Physics, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, South Africa.

Abstract

In the title complex, [NiCl₂(C₁₂H₉N₃)₂]·H₂O, a divalent nickel atom is coordinated by two 2-(pyridin-2-yl)-1H-benzimidazole ligands in a slightly distorted octa-hedral environment defined by four N donors of two N,N'-chelating ligands, along with two cis-oriented anionic chloride donors. The title complex crystallized with a water mol-ecule disordered over two positions. In the crystal, a combination of O-H⋯Cl, O-H.·O and N-H⋯Cl hydrogen bonds, together with C-H⋯O, C-H⋯Cl and C-H⋯π inter-actions, links the complex mol-ecules and the water mol-ecules to form a supra-molecular three-dimensional framework. The title complex is isostructural with the cobalt(II) dichloride complex reported previously [Das et al. (2011 ▸). Org. Biomol. Chem. 9, 7097-7107].

Keywords: 2-(pyridin-2-yl)-1H-benzimidazole; C—H⋯π interactions; crystal structure; hydrogen bonding; nickel(II) complex; transfer hydrogenation.

Grants and funding

The authors thank the NSERC of Canada for funding. CSM is grateful to NSERC for a CGS-D fellowship. PGH thanks NSERC for a Discovery Grant and the University of Lethbridge for a Tier I Board of Governors Research Chair in Organometallic Chemistry. SOO is grateful to the University of KwaZulu-Natal and National Research Foundation–South Africa (grant No. CPRR98938) for financial support.