One or more C-H bond(s) formed by substitution: reduction of carbon-nitrogen, -phosphorus, -arsenic, -antimony, -bismuth, -carbon, -boron and -metal bonds

The following chapter summarizes the various methodologies allowing the reductive cleavage of various carbon---hetereroatom single bonds or multiple bonds naming the transformation of C---N bond, C---P, C---As, C---Sb, C---Bi, C---C, C---Si, C---Ge, C---B, carbon---metal bonds to C---H bonds.