Synthesis and structural investigation of hafnium(IV) complexes with acetylacetone and trifluoroacetylacetone |
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Authors: | K V Zherikova N B Morozova N V Kuratieva I A Baidina I K Igumenov |
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Institution: | (1) A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk |
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Abstract: | Two volatile hafnium(IV) complexes with acetylacetone and trifluoroacetylacetone (HL) have been prepared and their structures have been studied at ?30°C. Crystal data for C20H28HfO8: a = 21.5493(4) Å, b = 8.36720(10) Å, c = 13.9905(3) Å; β = 116.5550(10)°, space group C2/c, Z = 4, d calc = 1.692 g/cm3, R = 0.015. Crystal data for C20H16F12HfO8: a = 8.1039(12) Å, b = 11.4499(14) Å, c = 15.790(2) Å; α = 99.341(4)°, β = 103.175(4)°, γ = 108.185(4)°, space group P?1, Z = 2, d calc = 2.003 g/cm3, R = 0.074. Both structures are molecular and comprise isolated complex molecules HfL4. The hafnium atom is coordinated with eight oxygen atoms of four β-diketonate ligands, Hf-O distances varying from 2.153 Å to 2.191 Å. The molecules make van der Waals contacts in the structures. |
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Keywords: | hafnium(IV) β -diketonates synthesis crystal structure mononuclear complex |
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