Ferrocenyl β-diketonato-based Cu(II)-oxo clusters with Cu₇ and Cu₁₀ cores

Abstract

Crystallization of [Cu(β-diketonate)(PPh₃)₂] (1a, β-diketonate=1-ferrocenyl-butane-1,3-dionato (= fb); 1b, = 1,3-diferrocenyl-propane-1,3-dionato (= dfp)) from ethanol, layered with a mixture of pentane/diethyl ether of ratio 1 : 1 (v/v) in air, afforded Cu(II)-oxo clusters [Cu₁₀(fb)₈(O)₄(tmdd)₂]·1.5Et₂O (2) and [Cu₇(dfp)₆(O)₂(OH)₂(tmdd)]·2Et₂O (3), respectively, in minor yield (tmdd = 1κ ² C,3κ ² C-tetramethyldisiloxane-1,3-diolato). These clusters were obtained in somewhat better yield when HOSiMe₂OSiMe₂OH was added to the crystallization mixtures. The molecular structures of 2 and 3 in the solid state are reported.

Keywords:

• Copper
• Cluster
• X-ray analysis

Notes

¹In the context of this report the terminus “copper(II)–oxo clusters” refers to all multinuclear copper(II) complexes with at least one μ-O atom, independent whether the O atom corresponds to an O₂ ⁻ or an RO⁻, respectively (R = any residue).