The HOMO-LUMO energy gap decreases for n=3-8, which is consistent with a redshift observed for calculated UV-Vis absorption spectra (see section 3.3). The decreasing energy gap in larger clusters also points towards enhanced electronic delocalization, which could afect the optical and electronic properties of these materials. The observed trends in the HOMO and LUMO energy levels and energy gaps highlight that the electronic properties of the Chini clusters can be tuned by varying the cluster size. This feature is crucial for synthesizing clusters for specific applications, ranging from catalysis to electronic and optical devices.