Of the 35 compounds, we find 10 compounds to have a difference in the hydricity above 6 kcal/mol between the experimental and QM computed values. We observe most of the outliers are anthracene derivates. From the experimental data, 7/8 of the anthracene derivates have high errors. This may indicate either a systematic error from the QM part or in the experimental measurements. Notably, 9/10 outliers are at the benzyl C-H bond, see Figure . Parker and coworkers also note that the experimental hydricities for toluenes, 9-substituted fluorenes, and 𝛼-or 10-substituted 9methylanthracenes has a higher degree of uncertainty . If the compounds are removed, We get a better correlation between the QM computed hydricities and the experimental hydricities. Still, we have chosen to keep them in our linear regression as the linear fit would be on a small number of compounds . See Figure for the linear regression without outliers. Ellis et al. also find a discrepancy between experimentally measured hydricity for Bz-NADH from Parker and coworkers . Here, (59.0 kcal/mol in DMSO). However, hydricities are known to be solvent dependent and can change significantly from DMSO (DMSO, 𝜖 = 47.2) to MeCN (MeCN, 𝜖 = 36.6). Also, the articles use reference numbers from Parker and coworkers, making it difficult to justify what is correct. Based on those findings, we recognize that our experimental dataset may be prone to high inaccuracies. Still, we want to acknowledge the previous experimental work from Parker and coworkers as it is the only first-hand (true) reference available. We encourage the experimental chemists to explore the hydricities of organic hydride donors further, broadening the knowledge in the field. 𝑚𝑖𝑛 values and experimental hydricities for 25 compounds, removing 10 outliers . r: Pearson correlation coefficient; 𝜌: Spearman's rank correlation coefficient; MAE: mean absolute error; RMSE: root mean squared error. QM calculations are carried out at the r 2 SCAN-3c/def2-mTZVPP/J CPCM(DMSO)//GFN2-xTB ALPB(DMSO) level of theory.