10.1016/S0277-5387(01)00799-9
The research focuses on the synthesis and characterization of C-triorganometallated (with metals being tin and silicon) bis-(thienyl)- and bis-(pyrazolyl)alkanes, which are complex organic compounds containing heterocycles. The study involves the lithiation of 2-(thien-2-ylmethyl)thiophene and 1-[(1H-pyrazol-1-yl)methyl]-1H-pyrazole derivatives using n-butyl lithium, followed by substitution with R3M (where R3 represents trialkyltin or trialkylsilyl groups) to form the desired organometallic compounds. The reactions primarily occur at the 5,5' positions of the bis-heterocyles, as confirmed by the X-ray crystal structure of one of the compounds. Spectroscopic techniques, including infrared spectroscopy, NMR (both proton and carbon-13), and M?ssbauer spectroscopy, were employed to analyze and confirm the structures of the synthesized compounds. The research also discusses the air and moisture sensitivity of the compounds and their ultimate degradation when exposed to atmospheric conditions.