The mass spectrum and 13C NMR spectrum of a hydrocarbon

The mass spectrum and 13C NMR spectrum of a hydrocarbon are shown. Propose a structure for this hydrocarbon, and explain the spectraldata.


100 80 60 40 20 aly 120 10 40 60 80 100 140 m/z TMS 200 180 160 120 100 80 60 20 0 ppm 140 40 Chemical shift (8) Intensi