Using single crystal X-ray diffraction the structure of polynuclear [Ni-6(OH)(4)(Piv)(7)(HOC4H8O)(HPiv)(4)], {K-4[Ni-12(CO3)(2)(Piv)(16)(OH)(8)(HOC4H8OH)(2)]}HPiv, {[Ni-6(OH)(4)(Piv)(6)(HOC4H8O)(Me2CO)(HOC4H8OH)(2)](4)x(Piv)(4)}, and {K[Ni2L2(Piv)(3)]}(a) complexes, where HOC4H8OH is 1,4-butanediol, HPiv is pivalic acid, and L is the anion of nitroxyl radical 2,2,5,5-tetramethyl-4-(3',3',3'-trifluoro-2'-oxy-1'-propenyl)-3-imidazolin-1-oxyl is determined.