Synthesis and characterization of holmium complexes containing beta-diketonate ligands

Abstract

Two holmium beta-diketonate complexes, Ho(hfa)(3)(H2O)(2) (1) and [Ho(hfa)(3)(H2O)(2)](triglyme) (2), have been prepared and characterized by IR, TGA, and single-crystal X-ray analyses. These complexes show polymeric chains by the intermolecular hydrogen bondings. The donor atoms of the intermolecular hydrogen bonding in both complexes are hydrogen atoms of the coordinated water molecules. The acceptor atoms in 1 are the carbonyl oxygen atoms of beta-diketonate ligands whereas those in 2 are oxygen atoms of the triglyme ligand. While compound 1 decomposes cleanly to Ho2O3, compound 2 sublimes intact. Crystal data for 1 and 2 are as follows: Ho(hfa)(3)(H2O)(2) triclinic P (1) over bar, a=10.158(4), b=11.628(2), c=12.579(6) Angstrom, alpha=67.02(3)degrees, beta=73.95(4)degrees, gamma=76.12(2)degrees, V=1299.8(8) Angstrom(3). [Ho(hfa)(3)(H2O)(2)](triglyme), monoclinic P2(1)/c, a=12.559(3), b=19.111(2), c=16.789(6) Angstrom, beta=110.59(4)degrees V=3772(2) Angstrom(3).