... Pergamon Press pie SYNTHESIS AND PROPERTIES OF SKIPPED CYCLIC C12H12 DIENEDIYNES Rolf Gleiter* and Roland Merger Institut fur Organische Chemie der Universit~t Heidelberg Im Neuenheimer Feld 270, D-6900 Heidelberg A simple synthetic procedure for the three skipped Cl2Hl2-dienediynes !-~ and the corresponding all-cis tetraenes ~-~ is reported. ... Chem. i00 (1988) 267. 4 R. Gleiter, R. Merger, Tetrahedron Lett. 30 (1989) 7183. ...