MS analysis of biindenylidenes

Abstract

Biindenylidene isomere are components of pyrolysis oils. The mass spectra were recorded and the fragmentation of the following biindenylidene isomers: (E)-2,3,2'3'-tetrahydro-[1,1']biindenylidene, (Z)-2,3,2',3'-tetrahydro-[1,1'] biindenylidene, 1,3,1',3'-tetrahydro-[2,2']biindenylidene and 2,3,1',3'-tetrahydro-[1,2']biindenylidene, as well as of spiro[1,la,6,6a- tetrahydrocyclopropa[a]indene-1,1'-2',3'-dihydro-1'H-indene] is discussed.