Abstract
Synthesis and X-ray structural investigation of hafnium(IV) pivalyltrifluoroacetonate were carried out. Crystallographic data for C32H40F12HfO8 are: a = 19.913(3) A, b = 11.8764(18) A, c = 16.530(3) A; β = 95.538(2)°; space group Cc, Z = 4, d calc = 1.637 g/cm3, R = 0.035. The structure is molecular; it is composed of discrete mononuclear Hf(ptac)4 molecules connected with each other by van der Waals interactions. The hafnium atom coordinates eight oxygen atoms belonging to four β-diketonate ligands; Hf-O distances are within the range 2.133–2.199 A.
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