Ethanol(nitrato)[tris­(4-cyano-3-phenyl-1H-pyrazol-1-yl)hydroborato]nickel(II)

The synthesis and structure is reported of Tp(Ph,4CN)Ni(NO(3))(EtOH) or [Ni(C(30)H(19)BN(9))(NO(3))(C(2)H(6)O)], the first half-sandwich complex of a cyano­scorpionate ligand. The pseudo­octa­hedral coordination sphere of the Ni(II) ion is comprised of a tridentate tris­(4-cyano-3-phenyl­pyrazol­yl)borate ligand, a bidentate nitrate ligand and a neutral ethanol ligand. The phenyl substituents on the Tp(Ph,4CN) ligand are relatively parallel to the planes of the ethanol and nitrate ligands. An inter­molecular hydrogen-bonding inter­action is evident between the ethanol OH group and the pyrazole CN substituent. The ethanol ligand was modeled with a 0.572 (13)/0.428 (13) disorder of the methyl C atom. [Image: see text]