isomeriaan

Isomeriaan is a theoretical term used in chemistry to describe a class of interconvertible isomers distinguished by a network-like set of interconversions mediated by concerted rearrangements of bonds. In this framework, several distinct isomers of a molecule exist at comparable energies, connected by low-energy pathways that involve simultaneous or sequential shifts of multiple bonds, often through pericyclic or sigmatropic-type processes. Unlike classical conformational isomerism, which differs mainly by torsional orientation around single bonds, isomeriaan interconversions entail changes to the connectivity of the carbon skeleton itself, while preserving the overall skeleton topology in a defined sense.

Classification: Isomeriaan systems are described as (a) isomeriaan conformers, where interconversion occurs without changing the fundamental connectivity, and (b) isomeriaan configurational isomers, where the bond topology changes but remains within a defined topological class. Mechanistic descriptions emphasize concerted multi-bond rearrangements or sequential, low-barrier steps that create a network of interconvertible states.

Examples: Scholars discuss hypothetical polycyclic systems and allenic or fulvene-like motifs where reversible rearrangements create isomeriaan networks. Spectroscopic signatures include exchange broadening in NMR and characteristic UV-visible shifts due to altered conjugation.

Applications and status: The concept remains speculative in mainstream chemistry and is discussed mainly within theoretical or dynamic covalent chemistry contexts. It serves as a descriptive tool for imagining complex interconversion landscapes and may inspire design of responsive materials or molecular machines.

See also: isomerism, conformational isomerism, configurational isomerism, dynamic covalent chemistry, molecular machine.