(3,3′-{(1<i>E</i>,1′<i>E</i>)-1,1′-[Ethane-1,2-diylbis(azan-1-yl-1-ylidene-κ<i>N</i>)]bis(ethan-1-yl-1-ylidene)}dipyrazine 1-oxide-κ<i>N</i><sup>4</sup>)bis(nitrato-κ<i>O</i>)nickel(II) monohydrate
Acta crystallographica. Section E