Structure and Magnetic Properties of a Heptanuclear Nickel(II) Compound: [Ni7(μ-NO2)8(μ2-OH)2(μ3-OH)2(OHpn)2(Opn)2]2·7H2O

The addition of a solution of 6 mmol of NaNO2 to an aqueous solution containing 3 mmol of Ni(NO3)2·6H2O and 3 mmol of OHpn produces the brown complex [Ni7(μ-NO2)8(μ2-OH)2(μ3-OH)2(OHpn)2(Opn)2]2·7H2O (OHpn is the 1,3-diamino-2-propanol), which is characterized by X-ray crystallography and magnetic susceptibility measurements and found to have an antiferromagnetic behavior.