CRYSTAL STRUCTURE OF (ACETYLACETONATO)(DICARBONYL)IRIDIUM(I)
K. V. Zherikova, N. V. Kuratieva, N. B. Morozova
Keywords: iridium(I), acetylacetone, carbonyl, XRD
Pages: 595-597
Abstract
The structure of Ir(CO)2(acac) is determined by XRD at room temperature. Crystallographic data for C7H7IrO4 are: a = 6.4798(5) Å, b = 7.7288(5) Å, c = 9.1629(10) Å, α = 105.738(2)°, β = 90.467(3)°, γ = 100.658(2)°, space group P1 V= 433.24(6) Å3, Z = 2, dcalc = 2.662 g/cm3, R = 0.0167. The structure is built of isolated mononuclear molecules. The central iridium atom has a square coordination environment formed by two oxygen atoms that belong to the acetylacetonate ligand and two carbon atoms of carbonyl groups. The average Ir-O and Ir-C bond lengths are 2.045(3) Å and 1.832(6) Å respectively. Molecules are stacked in such a way that the planes of coordination squares turn out to be parallel to the Ir…Ir distances between the nearest neighbors in the stack of 3.242 Å and 3.260 Å.
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