Synthesis, crystal structure, and optical characteristics of [Pd2Hg4Cl6{Te(DMB)}6]·2DMF, [HgClTe(DMB)]4, and the ring-forming cluster [Pd12(TePh)24]·2DMF†
Abstract
The clusters here discussed represent improvements to our preparative techniques directed toward the synthesis of ternary nanoclusters of the type MM′Te. Hg(TeR)2 (R = (2,6-OCH3)2C6H3) reacts with PdCl2 to give [Pd2Hg4Cl6{(TeR)}6]·2DMF (1) and [HgClTeR]4 (2), and further with Pd(O2CCH3)2 to give [Pd12(TePh)24]·2DMF (3). The core of compound 1 was analysed by first principles DFT and the results confirm the existence of two systems 3c–4e−, in which the two TeII atoms act as bridging ligands. While compound 2 appears to provide the driving force for the formation of cluster 1. In the case of metallocycle 3, the driving force guiding the reaction probably originates from the mercury salts (HgCl2 or Hg(Ac)2) formed during the process.