Mechanically induced C-C bond formation was demonstrated by the
laser driven
shock wave generated in liquid normal
alkanes at room temperature. Gas chromatography mass spectrometry analysis revealed the dehydrogenation condensation between two
alkane molecules, for seven normal
alkanes from
pentane to
undecane. Major products were identified to be linear and branched
alkane molecules with double the number of carbons, and exactly coincided with the molecules predicted by supposing that a C-C bond was formed between two starting molecules. The production of the
alkane molecules showed that the C-C bond formation occurred almost evenly at all the
carbon positions. The dependence of the production on the
laser pulse energy clearly indicated that the process was attributed to the
shock wave. The C-C bond formation observed was not a conventional passive chemical reaction but an unprecedented active reaction.