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Is the thermal [4+2] cycloaddition between allyl anion and ethylene an allowed one? To answer, draw the HOMO of allyl anion and the LUMO of ethylene, and comment on the symmetry match of the two.
Net Present Value
A financial metric used to evaluate the profitability of an investment, calculating the difference between the present value of cash inflows and outflows over a period of time.
Rotating Magnetic Field
A magnetic field that rotates in space within electrical machinery, used to generate rotating mechanical force.
Stationary Windings
Fixed coils of wire in an electric motor or generator that contribute to magnetic field production when current flows through them.
Voltage Regulator
Controls voltage in a circuit either electromechanically (obsolete) or electronically.
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