What is alanine adipate, in fact?

We show that a recently published paper Spectroscopic evaluation of Alanine Adipate nonlinear opti-cal materials growth dynamics: Mechanical and thermal optimization (S. Akilandeswari, L. Jothi, J. Mol. Struct. 1240 (2021) 130577) is completely erroneous. A so-called alanine adipate actually is adipic acid, which is centrosymmetric and therefore cannot be a nonlinear optical crystal showing second harmonic activity. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The recently published paper on the spectroscopic evaluation of nonlinear optical materials growth dynamics was found to be completely erroneous. The substance studied was not alanine adipate as claimed, but adipic acid, which is unable to show second harmonic activity.