In this work, the chemical space (Figure ) focuses on p-terphenyl molecules for molecular electronics due to their rigidity and extended π-conjugation, which results in low tunneling barriers . We designed a series of singly anchored p-terphenyl molecules based on the parent molecule PPP by including additional substituents on the three benzene rings. PPM, PMP, and MPP each contain a methyl group on one of the aromatic rings, which changes preferred resonance structures, alters ring torsional angles, or introduces steric hindrance during the formation of molecular junctions. Molecule PPF was incorporated to investigate the effect of electron withdrawing groups in contrast to the electron donating nature of the methyl substituted terphenyls. Three additional control molecules, PPN, PPS, and PPT, are characterized to understand the role of chemical anchor groups.