C9H19

C9H19 is the molecular formula for a nonane isomer. Nonane is a saturated hydrocarbon belonging to the alkane family, meaning it consists solely of carbon and hydrogen atoms connected by single bonds. The general formula for alkanes is CnH2n+2, and for n=9, this yields C9H20. Therefore, C9H19 does not represent a neutral, stable molecule in isolation but rather indicates a fragment or a radical derived from a nonane molecule.

A C9H19 radical would have one fewer hydrogen atom than a stable nonane molecule, making it highly reactive. These radicals can be formed through processes such as homolytic cleavage of a C-H bond in nonane. Such radicals are typically intermediates in chemical reactions, for example, during combustion or in free-radical polymerization. The specific structure of the C9H19 radical would depend on which hydrogen atom was removed from the nonane parent molecule, leading to various possible positional isomers of the radical. For instance, removing a hydrogen from a terminal carbon would result in a primary radical, while removing one from a secondary carbon would yield a secondary radical. The reactivity and properties of these different radical isomers would vary.