Alkyne metathesis by molybdenum and tungsten alkylidyne complexes

Alkyne metathesis by molybdenum and tungsten alkylidyne complexes is now similar to 45 years old. Progress in the practical aspects of alkyne metathesis reactions with well-defined complexes, as well as applications, in the last decade, guarantees that it is destined to become a useful method for the synthesis of organic molecules.