Both Ph-PTZ and DABNA-1 (Table , Entries 2 and 5) can promote the quantitative dehalogenation of methyl 4-chlorobenzoate; however, coupling with the radical trap is not efficient and results in a roughly 50:50 mixture of dehalogenated product to coupled product for Ph-PTZ as well as DABNA-1. In MeCN-d3 only the coupled product was observed in both the 1 H NMR spectrum and the GC-MS, implying that the proton needed for the dehalogenated product (2) is abstracted from the solvent (Figure ). Using pivalonitrile instead of acetonitrile as the solvent led to a slight improvement in the ratio of coupled product to dehalogenated product ( Both Ph-PTZ and DABNA-1 act as equally good PCs for this reaction; however, lower energy excitation can be used with DABNA-1 (Table , Entry 5), while at 440 nm trace product is formed using Ph-PTZ (Table , contrast Entries 2 and 3). This is important as certain organic compounds absorb at 390 nm but not at 440 nm. For example, the use of methyl 4-iodobenzoate yielded 21% of 1 and 19% of 2 in the absence of a PC when irradiated at 390 nm, but no reaction was observed when the substrate was irradiated at 440 nm (Table ). When using DABNA-1 as a PC in the reaction with methyl 4-iodobenzoate, the products 1 and 2 were formed in yields of 24 and 27%, respectively (Table ). When Ph-PTZ is used as the PC (lexc = 390 nm), yields of 33 and 40% for 1 and 2, respectively, were obtained, largely mirroring the efficiency of the background reaction (Table ). Upon irradiation at 440 nm, none of 4CzIPN