The crystal and molecular structures of dichlorobis(5,7-diphenyl-1,2,4-triazolo[1,5-α]pyrimidine)zinc(II) (1) and dichlorobis(5,7-diphenyl-1,2,4-triazolo[1,5-α]pyrimidine)cobalt(II) (2)

Article abstract of DOI:10.1016/S0020-1693(96)05553-3

The synthesis and structural studies of the new ligand 5,7-diphenyl-1,2,4-triazolo[1,5-α]pyrimidine (dptp), which can be considered as an analog of purine, and its complexes are described. Complexes were characterised by spectral measurements (IR, NMR, UV-Vis). In addition X-ray structural analysis was performed. Crystals of [Zn(C₁₇H₁₂N₄)₂Cl₂] (1) revealed the following parameters: M_r=680.9; monoclinic C2/c; a=17.777(4); b=18.738(4); c=12.759(3) A; β=133.04(3)°; V=3106.3(12) A³; Z=4; Dx=1.456 Mg m^-3; Mo Kα λ=0.71069 A°; μ=1.019 mm^-1; F(000) = 1392; T=293 K;R=3.74% for 2188 observed reflections. [Co(C₁₇H₁₂N₄)₂Cl₂] (2); M_r=674.4; monoclinic C2/c; a=17.791(4); b=18.773(4); c=12.780(3) A; β=132.89(3)°; V=3127.3(12) A³; Z=4; Dx=1.432 Mg m^-3; Mo Kα λ=0.71069 A; μ=0.756 mm^-1; F(000) = 1380; T=293 K; R=5.22% for 1630 observed reflections.