The prevailing catalytic reaction for the N-Pt-N phenalene derivative is nucleophilic, as evidenced by its notably elevated (Figure ) nucleophilic index (0.2130), signifying the catalyst's capacity to allocate electron density to electron-deficient entities, including protons and electrophilic substrates. The N-Pt-N framework, characterized by its electron-donating nitrogen atoms and a conjugated phenalenes structure, serves to augment the nucleophilic character of the Pt center. This property renders the catalyst especially efficacious in reactions where the activation of electrophiles is a critical step, such as in HER. In this reaction, the nucleophilic Pt center interacts with protons, resulting in the formation of a hydride intermediate that facilitates the generation of molecular hydrogen. The N-Pt-N coordination stabilizes the electronic structure, ensuring efficient charge transfer and high catalytic activity. This mechanism underscores the importance of the nucleophilic properties of the catalyst, as they directly contribute to its ability to perform in energyrelated applications like HER. Additionally, the catalyst demonstrates moderate radical character, with a radical index (0.206) close to the nucleophilic value. This property suggests its capability to stabilize radical intermediates, making it suitable for reactions involving single-electron transfer (SET) processes. The delocalized electronic states provided by the conjugated phenalene ring and the Pt center contribute to the stabilization of unpaired electrons, broadening the scope of potential catalytic applications. Radical-mediated photocatalytic reactions could also benefit from this dual functionality.