The detection of prebiotic molecules in astrophysical environments, particularly in star-forming regions, is essential for understanding the origins of life and the chemistry of the interstellar medium. Among such species, cyanomethanimine stands out as an intermediate in adenine formation and as a potential precursor of biologically relevant molecules. Its three structural isomers $Z\text{−}C, E\text{−}C$, and $N$, all of which have already been detected in the interstellar medium, exhibit electron-scattering properties that are crucial for modeling radiation-induced processes in astrophysical environments. This article presents a theoretical investigation of low-energy electron scattering by the three isomers of cyanomethanimine. Elastic integral cross sections were computed using the Schwinger multichannel method. The calculations were performed at the static-exchange and static-exchange-plus-polarization approximations, for impact energies up to 10 eV. Three ${\pi }^{*}$ shape resonances were visible in the static-exchange cross sections of each isomer; the low-lying resonance became a bound state when polarization was considered. Additional analyses included collision-Hamiltonian diagonalization to characterize eigenvalues near resonant and bound states and their associated orbitals. The results indicate that the $Z\text{−}C$ isomer is the most stable isomer, while the $E\text{−}C$ and $N$ isomers lie at higher energies, separated by significant isomerization barriers.

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• Atomic & molecular collisions
• Atomic & molecular structure
• Electron & positron scattering
• Electronic structure of atoms & molecules
• Scattering theory
• Molecules
• Density functional theory
• First-principles calculations
• Hartree-Fock methods
• Molecular orbital theory
• Quantum chemistry methods