Synthesis and crystal structure of 1D 2,3-naphtho 15-crown-5 complex [Na(N15C5)]2[Ni(i-mnt)2] containing S⋅sC and S⋅sπ interactions

The reaction of 2,3-naphtho-15-crown-5 (N15C5) with Na2[Ni(i-mnt)2] [i-mn = 1,1-dicyanoethylene-2,2-dithiolate] affords the title complex [Na(N15C5)]2[Ni(i-mnt)2] (1), which is characterized by elemental analysis, FT-IR, UV-visible spectra and single crystal X-ray diffraction. 1 crystallizes in the triclinic, space group P\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\bar{1}$$\end{document} with a = 8.291(4), b = 12.833(7), c = 12.913(6) Å, α = 115.732 (7), β = 105.030(7), γ = 90.912(8)∘, V = 1182.2(10) Å3, Z = 1 and R1(wR2) = 0.0422(0.1001). The single crystal X-ray analysis shows that the [Na(N15C5)]+ complex cations act as the bridges linking the [Ni(i-mnt)2]2− anions into a 1D infinite chain through Na–N interactions and S⋅sC and S⋅sπ interactions are observed in the chain with the shortest S⋅sC distance of 3.433 Å.