... Paper) Dalton Trans., 2014, 43, 8338-8343. Synthesis and characterization of germa[n] pericyclynes†. ... 3(b) and ESI†). Two shoulders were observed at 205 (4b: ε = 18 683, 5b: 22 377) and 213 nm (4b: ε = 13 919, 5b: 17 798), which were not observed in acyclic analogue 2b. ...