The possibility of observing Raman‐inactive vibrations in solids by coherent Raman spectroscopy via the magneto‐optic effect is demonstrated. Although vibrations involving nuclei lying at a center of inversion are Raman inactive in first order, they are infrared active and therefore couple to electromagnetic radiation creating phonon polaritons. The magneto‐optic effect permits coupling of laser light to the oscillating magnetic field of the polariton mode. A theory is presented and used to calculate the effective third‐order nonlinear susceptibility for this mechanism. The magnitude is then estimated from results of Faraday rotation experiments. The effect is found to be much smaller than for most Raman‐active vibrations, yet remains within current detectable limits.