A chemist, Ilov Boronin, carried out a reaction of trans-2-pentene with BH₃ in THF followed by treatment with H₂O₂Y–OH. Two products were separated and isolated.

Desperate to know their structures, Ilov took his compounds to the spectroscopy laboratory and found that only the mass spectrometer was operating. The mass spectra of the two products are given in Fig. P12.38. Suggest structures for the compounds, and indicate which mass spectrum goes with which compound.

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relative abundance (a) 100 80 20 ош 10 20 30 40 45 50 60 70 80 90 mass-to-charge ratio m/z 100 110 120 130 140