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Identify the two geometric isomers of stilbene, C6H5CH=CHC6H5 from their λmax values, 294 nm and 278 nm
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- 13C NMR spectroscopy provides valuable information about the environments of a molecule's carbon atoms. Since carbon atoms are often connected to hydrogen atoms, which could split the carbon signal through spin-spin coupling, the coupling between C and H is often "turned off" through the use of broadband decoupling, causing each C signal to appear as a singlet. Draw an isomer of C5H11Cl that would be expected to have four resonances in its 13C NMR spectra.C8H8O produces an IR spectrum with 3063, 1686, 1646 cm signals. HNMR is a singlet at 2.6ppm (3H), and multiplet at 7.5 (5H). What is the product66 892 41 State which of the following molecules are infrared active and justify your answer: H2, CO2, F2 , H2O , N2 , NO , O2 , N20 , C6H6 (benzene). Calculate the energy required for an amide stretch at 3300 cm 1, giving your answer in kJ mol-1. Velocity of Light, c = 3 x 10® ms1 Planck's Constant, h = 6.63 x 10-34 J s Avogadro number, NA = 6.02 x 1023 mol1 %3D DFocus BE