Meta-IRC (Intrinsic Reaction Coordinate) theory has firstly been formulated.

Selected Publications:

"Differential Geometry of Chemically Reacting Systems," A. Tachibana and K. Fukui, Theor. Chim. Acta (Berl.) 49, 321-347 (1978).

"Intrinsic Dynamism in Chemically Reacting Systems," A. Tachibana and K. Fukui, Theor. Chim. Acta (Berl.), 51, 189-206 (1979).

"Intrinsic Field Theory of Chemical Reactions," A. Tachibana and K. Fukui, Theor. Chim. Acta (Berl.), 51, 275-296 (1979).

"Novel Variational Priniciple of Chemical Reactions," A. Tachibana and K. Fukui, Theor. Chim. Acta (Berl.), 57, 81-94 (1980).

"Extended Hessian Matrix along the Reaction Coordinate," A. Tachibana, Theor. Chim. Acta (Berl.), 58, 301-308 (1981).

"String Model of Chemical Reaction Coordinate," A. Tachibana, J. Math. Chem., 7, 95-110 (1991).

"String Model of Chemical Reactions," A. Tachibana, in "Conceptual Trends in Quantum Chemistry," Eds. by E. S. Kryachko and J. L. Calais (Kluwer, Dordrecht, 1994), pp. 101-118.