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Spectral Data Analyses and Structure Elucidation of Sedative‐Hypnotic Zopiclone

Abstract The infrared spectrum, ultraviolet spectrum, mass spectrum, and nuclear magnetic resonance spectrum of the sedative‐hypnotic zopiclone were reported and interpreted comprehensively. All the 1H and 13C NMR chemical shifts were assigned by means of 1H‐1H and 13C‐1H correlation spectroscopy, and correlation spectroscopy via long range coupling. The main characteristic fragmentations in mass spectra, vibrations of functional groups in infrared spectrum, and electron transition in ultraviolet spectrum of zopiclone were also discussed.