A convenient synthesis of bis-dialkylaminoacetylenes

The novel compounds tris-diethylaminocyclopropenyl perchlorate, bis-diethylaminocyclopropenone, and bis-dimethylaminocyclopropenone have been made. Pyrolysis of the cyclopropenones affords bis-dimethylamino- and bis-diethylaminoacetylene, and with iron carbonyl these have been converted to iron complexes of tetrakis-dialkylaminocyclopentadienones.