ether 4000 4.0 3500 4 3.5 CH (sp³) 3000 3.0 2.5 Molecule 14 2500 2000 wavenumber (cm-¹) 2.0 1500 4 4 (quintet) (sextet) Jhul 1.5 6 1.0 CO 1000 0.5 500 0.0

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