For a given set of refcodes corresponding to the same complex from the CSD, the lowesttemperature and highest-temperature structures were recorded as the most likely LS and HS structures. For these complexes, the abstracts were mined 122 using the pybliometrics tool 126 /Scopus package and analyzed for the appearance of spin crossover keywords, lack of negative references to spin crossover, and positive VADER 127 sentiment over sentences containing the spin crossover keywords. From 450 sets of complexes with common base refcodes (1,541 total refcodes) that were candidate SCOs, only 258 sets of complexes with common base refcodes (1,099 total refcodes) showed positive sentiment and spin crossover keywords (Figure and Supporting Information Table ). To ensure that crystal structures in multiple spin states were indeed recorded in the CSD, we filtered the data to require complexes to have high-temperature (high-T) average equatorial bond lengths at least 0.02 Å greater than low-temperature (low-T) average equatorial bond lengths to remove less likely SCO complexes, removing 58 additional complexes, i.e., corresponding to 29 base refcodes. We further removed 196 complexes corresponding to 98 base refcodes without user-labelled charges or hydrogens that appeared incorrectly added (Figure and Supporting Information Table ). Lastly, when the same complex, as judged by an identical molecular graph determinant, was found with multiple base refcodes (i.e., 23 sets of base refcodes with 58 total refcodes), the base refcode for which that sum of the R factors for the low-T and high-T structures was the lowest was selected for further analysis, resulting in 96 unique Fe(II) SCO complexes (Figure and Supporting Information Table ). Structures of all 96 Fe(II) SCO complexes in pairs of low-and high-T crystallization are provided in the Supporting Information zip file.