The Fourier transform infrared spectrum of tropolone( OH) vapor in the 1175-1700 cm(-1) region is reported at 0.0025 and 0.10 cm(-1) spectral resolutions. The 12 vibrational fundamentals in this region of rapidly rising vibrational state density are dominated by mixtures of the CC, CO, CCH, and COH internal coordinates. Estimates based on the measurement of sharp Q branch peaks are reported for 11 of the spectral doublet component separations DSv = vertical bar Delta(v) +/-Delta(0)vertical bar . Delta(0) = 0.974 cm(-1) is the known zero- point splitting, and three a(1) modes show tunneling splittings Delta(v) approximate to Delta(0), four b(2) modes show splittings Delta(v) approximate to 0.90 Delta(0), and the remaining four modes show splittings Delta(v) falling 5-14% from Delta(0). Significantly, the splitting for the nominal COH bending mode v(8) (a(1)) is small, that is, 10% from Delta(0). Many of the vibrational excited states demonstrate strong anharmonic behavior, but there are only mild perturbations on the tautomerization mechanism driving Delta(0). The data suggest, especially for the higher frequency a(1) fundamentals, the onset of selective intramolecular vibrational energy redistribution processes that are fast on the time scale of the tautomerization process. These appear to delocalize and smooth out the topographical modifications of the zero- point potential energy surface that are anticipated to follow absorption of the v(v) photon. Further, the spectra show the propensity for the Delta(v) splittings of b(2) and other complex vibrations to be damped relative to Delta(0).