collinear reaction

https://doi.org/10.1351/goldbook.C01156
This is a reaction assumed to occur via an @A00092@ in which all of the atoms directly involved in the process lie along a straight line.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 158 [Terms] [Paper]