Identify the following compound from its IR and proton NMR spectra. C4H6O: NMR: δ 2.43 (1H, t, J = 2 Hz); δ 3.41 (3H, s); δ 4.10 (2H, d, J = 2 Hz) IR: 2125, 3300 cm–1 The C4H6O compound liberates a gas when treated with C2H5MgBr.

Which statement is actually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.