Données crystallographiques sur les composés Ni(C₁₅H₁₁N₃) X₂.nH₂O,X=Cl⁻,NO₂⁻,NCO⁻

Three members have been characterized of the family Ni(terpy)X₂.nH₂O, X =Cl⁻, NO₂⁻, NCO⁻, prepared by reaction in solution. They have space groups P, P and P2₁/n respectively. Powder patterns of Ni(terpy) Cl₂.3H₂O, Ni(terpy)(NO₂)₂.1H₂O and Ni(terpy)(NCO)₂.1H₂O have been indexed. For the chloride compound: a = 6.970(5), b = 9.670(2), c = 13.658(8) Å, α = 81.73(2), β = 78.99(4), γ = 75.51(2)°, V = 870.5(7) ų, D_m = 1.60(2), D_x = 1.60 Mg m⁻³, Z = 2; for the nitrite compound: a = 9.077(5), b = 9.445(5), c = 10.710(4) Å, α = 76.69(2), β = 70.87(3), γ = 68.04(1), V = 798.4(4) ų, D_m = 1.66(3), D_x = 1.68 Mg m⁻³, Z = 2; and for the cyanate compound: a = 9.435(4), b = 13.593(4), c = 13.704(6) Å, β = 107.51(2)°, V = 1676.3 (8) ų, D_m = 1.60(3), D_x = 1.58 Mg m⁻³, Z = 4. The study of their spectroscopic and magnetic properties suggests an octahedral stereochemistry for Ni^II. The JCPDS Diffraction File Nos. are 36-1998 for Ni(terpy)Cl₂.3H₂O, 36-1997 for Ni(terpy)(NO₂)₂.H₂O and 36-1996 for Ni(terpy)(NCO)₂.H₂O.