CN multiple bond, due primarily to differences in the through‐space field effects of the various Z. The effect diminishes for 1 in neat TFA because of the greater contribution ofdipolar ArC+ξN− to the resonance hybrid. Deviations of the aromatic carbon shifts fromsubstituent chemicalshift additivities are small, yet show distinct patterns for many of the carbon resonances. The deviations of the C‐1—CNipso