Spectroscopic investigations of a pharmaceutical solid form analogue: pyrimethanil l -tartaric acid hemi-cocrystal

are diagnostic of distinct hydrogen bonding interactions within the asymmetric unit. The suitability of Raman spectroscopy for identifying hydrogen bonding is also examined, this technique being less information-rich than FTIR-ATR. Collectively, the study demonstrates how vibrational spectroscopy could be used to supplement investigations on the structure and form of the cocrystal as a potential drug delivery vector for this fungicide.