New volatile zirconium(IV) complex with methoxy substituted β-diketonate

详细

A new zirconium(VI) complex with fluorinated methoxy substituted β-diketonate ZrL₄ is synthesized where L = 1,1,1-trifluoro-5-methoxy-5-methylhexane-2,4-dionate. The complex sublimates without decomposition at a low pressure (10^–2 Torr) at 140 °C. The crystal structure of the complex is molecular and composed of mononuclear ZrL₄ molecules. Crystallographic data for C₃₂H₄₀F₁₂O₁₂Zr are: C2/c, a = 12.193(2) Å, b = 21.922(4) Å, c = 15.585(3) Å, β = 101.51(3)°, V = 4082.1(14) ų, Z = 4, d = 1.523 g/cm³. The coordination environment of the zirconium atom is formed by eight oxygen atoms of four β-diketonate ligands; the coordination polymer is a square antriprism. The Zr–O distances are in the range 2.16-2.19 Å. The thermal properties of the complex are studied by TG–DTA.