Extended germa[N]pericyclynes: synthesis and characterization.
Hiroki TanimotoTaro FujiwaraJunta MoriTomohiko NagaoYasuhiro NishiyamaTsumoru MorimotoShunichiro ItoKazuo TanakaYoshiki ChujoKiyomi KakiuchiPublished in: Dalton transactions (Cambridge, England : 2003) (2018)
We herein describe the syntheses and characterization of extended germa[N]pericyclynes, which are macrocycles composed of germanium-butadiyne units. The obtained novel extended germa[4]-[8]pericyclynes were characterized by X-ray crystallography, UV-Vis spectroscopy, fluorescence and phosphorescence emission spectroscopy, and cyclic voltammetry, and exhibited characteristic absorptions and emissions. Density functional theory (DFT) calculations suggested smaller HOMO-LUMO gap energy compared to that of general germapericyclynes.