The Z conformer is only mentioned once in the literature where it is postulated as an intermediate in the atmospheric chemical reaction between the solvent monoethanolamine, H 2 NCH 2 CH 2 OH, and the OH radical; that study was prompted by the possible large-scale use of the solvent in post-combustion carbon dioxide capture technologies. The ground state 1 A of C s symmetry has ∠HOCC = 0 • and ∠CCNH = ±119.9 • ; relaxed potential energy scans are compromised by through-space interactions between the OH and NH 2 groups -it is considerably more stable than the E conformer by some 16 kJ mol -1 .