Diradical intermediate

A transient species with two unpaired electrons, potentially formed in stepwise cycloadditions.

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IR spectroscopy Regioselectivity NMR spectroscopy Stereochemistry Thermolysis Chromatography Mass spectrometry (MS) Diels-Alder cycloaddition Differential scanning calorimetry (DSC) Ketone HPLC (high-performance liquid chromatography) FT-IR spectroscopy X-ray crystallography Reaction Mechanism Crystal packing Cycloaddition Computational Modeling Ring-Opening Reaction Activation Energy Thermal Transformations Concerted Mechanism Quantum Yield Kinetic Control Thermodynamic Control Isotopic Labeling UV Irradiation Conformational Control Acrylonitrile Spin State Photocyclization Rearrangement Reaction Pericyclic reaction Transition state Excited state Benzylidene Spectroscopic evidence Endo/exo selectivity Solid-state reaction Spirocyclic Compound

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