New half-sandwich nickel(II) complex with mono-hydrotris(3,5-dimethylpyrazolyl)borate ligand and nitrite

This paper presents the syntheses, crystal structure and properties of a new half-sandwich mononuclear nickel(II) complex containing a single hydrotris(3,5-dimethylpyrazolyl)borate (Tp*) ligand and nitrito and methanol co-ligands, [Tp*NiII(η2-O2N)(CH3OH)]. The complex crystallizes in the triclinic system, space group P1̄ (No. 2), a=10.0669(11), b=10.1132(11), c=11.8420(12) Å, α=76.895(2), β=73.234(2), γ=62.470(2)°, Z=2, R1=0.0458, wR2=0.1187. The Ni(II) ion in the complex is coordinated to three pyrazolyl nitrogen atoms, two oxygen atoms of NO2− and one oxygen atom of CH3OH to form a distorted octahedron. The NO2− was coordinated in an asymmetric nitrito-O,O′-bidentate coordination mode with an O(1)–Ni–O(2) angle of 57.71(11)° and Ni–O bond lengths of 2.1882 and 2.1222 Å.