The book summarizes and gives a critical analysis of the literature on the use of reactive covalent fluorides (organic and inorganic) for the synthesis of fluoroorganic compounds. New methods of using SF4 for the fluorination of complex polyfunctional organic compounds are described. The prospects are shown for the selective fluorinations of complex compounds with non-traditional fluorinating agents (halogen fluorides, XeF2, fluorosulphuranes, N-F- and O-F-containing compounds). The book gives recommendations for the practical use of these fluorides, and typical synthetic procedures. It introduces the beginner to modern methods of fluorination and helps qualified scientists and technologists to choose the optimal methods of synthesis. Using the fluorinating agents described in this book, it is possible to synthesize various fluorine-containing substances.