Notes. A planar, binucleating, pyrazole derivative ligand. Crystal structure of bis[µ-3,5-bis(2′-pyridyl)pyrazolato-N1N′:N2N″]-bis[dimethanolnickel(II)] dichloride dihydrate

Abstract

The co-ordinating properties of the ligand 3,5-bis(2-pyridyl)pyrazole (Hbpypz) are reported and complexes of general formulae [M(bpypz)]NO₃·xH₂O (M = Co^II, Ni^II, Cu^II, Zn^II, or Cd^II), [M(bpypz)] Cl·xH₂O (M = Mn^II, Co^II, Ni^II, or Zn^II), and [M(bpypz)]Br·xH₂O (M = Co^II Ni^II or Zn^II) are described. The crystal and molecular structure of [Ni₂(bpypz)₂(MeOH)₄]Cl₂·2H₂O is also reported. The crystals are triclinic, space group P with a= 8.934(3), b= 8.958(6), c= 12.040(5)Åα= 72.02(3), β= 77.66(3), and γ= 68.58(3)°.