Chemistry Letters, Vol.29, No.10, 1226-1227, 2000
Ring contraction of 1,2-digermacyclohexa-3,5-dienes initiated by electron transfer reactions with TCNE
The thermal reaction of 1,2-digermacyclohexa-3,5-dienes with tetracyanoethylene (TCNE) gave 1-germacyclopenta-2,3-diene as a germylene extrusion compound through a charge-transfer complex. The 1-germacyclopenta-2,4-diene was trapped with TCNE to give 5,5,6,6-tetracyano-7-germanorbsmene.