High-resolution FTIR spectra of the short lived species ketenimine have been recorded in the region 700a??1300 cma??1 and over 1500 transitions of the I?10 and I?6 modes have been assigned. Effective rotational and centrifugal distortion parameters for the v10 = 1 and v6 = 1 (excluding Ka = 5) states were determined by co-fitting transitions, and treating strong a- and c-axis Coriolis interactions between them. Other perturbations attributed to interactions with the v8 = 2 and v12 = 1 + v8 = 1 dark-states were also observed and treated. The I?10 transitions are predicted to be inherently very weak, but are enhanced by an intensity stealing effect with the highly IR active I?6 mode. A mechanism for this intensity stealing in ketenimine is also detailed.