Synthesis of Bis(4,4,4-trifluoro-1-(4-(triphenylsilyl)phenyl)butane-1,3-dionato)- and Bis(4,4,4-trifluoro-1-(4-(triphenylgermyl)phenyl)butane-1,3-dionato)(dipyridine)copper(II)

Abstract

Two new diketone ligands containing tetraphenylsilyl and tetraphenylgermyl fragments were synthesized and thoroughly characterized. Their interaction with Cu(II) ions led to the formation of insoluble coordination compounds, which are assumed to possess polymeric structures. Reaction of these compounds with an excess of pyridine in dichloromethane solution afforded molecular complexes of the composition [Cu(L)₂(Py)₂]. The molecular structure of the tetraphenylsilyl-based complex (5a) was established by single-crystal X-ray diffraction. Although crystals of the germanium analogue (5b) were unsuitable for direct structural analysis, powder X-ray diffraction confirmed its phase purity and demonstrated its isostructural to the silicon complex. These results expand the coordination chemistry of silicon- and germanium-substituted diketone ligands and illustrate their potential for constructing new Cu(II) coordination architectures.