Complex sentence: Relative to AgPF 6, however, silver nitrate is poorly soluble in weakly basic solvents: the nitrate anion is Lewis basic and presents an interfering ligand that precludes its use in stringent applications.
Split into simpler sentences: Relative to AgPF 6, silver nitrate is poorly soluble in weakly basic solvents, however. More seriously, nitrate is Lewis basic and hence presents an interfering ligand that precludes its use in stringent applications.