Two new dinuclear platinum complexes Pt₂Ph₄L^Et (1a) and Pt₂Ph₄L^F (1b) (where L^Et is 1,2,4,5-tetrakis(6-ethylquinolin-8-yl)benzene and L^F is 1,2,4,5-tetrakis(6-trifluoromethoxylquinolin-8-yl)benzene) were synthesized and characterized. Triggered by an oxidant NCS, 1a and 1b displayed interesting reactivity of reductive dearomatization of the central phenyl rings of L^Et and L^F ligands respectively. The preliminary radical scavenger test gave some mechanistic insights.