Li [C6F5B (OMe) 3], Li [C6HF4B (OMe) 3](all three isomers) and Li [3, 4, 5-C6H2F3B (OMe) 3] are the first examples of polyfluorophenyltrimethoxyborate salts which have been applied as reagents to Pd-catalysed cross-coupling reactions. A series of polyfluorinated biphenyls C6H5− nFn-C6H4F-4′ were obtained from Li [C6H5− nFnB (OMe) 3] and the model substrate 4-FC6H4I in the presence of Pd catalysts. The influence of the number and the ...