Data for: Where the vibronic coupling lies: promoting-mode frequencies and second-order rate theory for reverse intersystem crossing in multiresonance TADF emitters

Triplet-triplet nonadiabatic couplings and signed singlet-triplet spin-orbit vectors (PBE0/def2-SVP, Tamm-Dancoff) for 121 multiresonance TADF emitters, mode-resolved couplings for 17 emitters with computed vibrational spectra, exact and second-order reverse intersystem crossing rates, perturbation diagnostics, and scripts that regenerate the article figures and ESI tables. Emitter geometries, measured rate constants, singlet-triplet gaps and reorganisation energies are from M. Hagai, N. Inai, T. Yasuda, K. J. Fujimoto and T. Yanai, Sci. Adv. 10, eadk3219 (2024); the geometries are not redistributed, and each record gives a fingerprint for checking a local copy. The archive risc_pccp_data_v1.zip contains the data, the replay scripts and SHA256SUMS; README.md describes every file. Patent applications related to the computational method have been filed.