The dehydrogenation and decomposition of cyclohexene on clean Pd(111) have been investigated using Fourier transform mass spectrometry detection with thermal desorption spectroscopy (FT-TDS) and laser-induced thermal desorption (LITD-FTMS). TDS shows two molecular desorption peaks for cyclohexene centered around 180K and 230K in the submonolayer regime, with benzene desorbing at ~450K. LITD experiments show that benzene formation occurs at low temperatures (<150K). The results of TDS experiments with c-C 6 H 1 0 on Pd(111) are similar to those on Pt(111). However, the LITD results differ dramatically. Where c-C 6 H 1 0 reacts away completely in both systems by 180K, laser-induced desorption of benzene does not occur in significant amounts until ~280K on Pt(111).