dl-Piperidinium-2-carboxyl-ate bis-(hydrogen peroxide): unusual hydrogen-bonded peroxide chains

Mger A Navasardyan; Dmitry A Grishanov; Petr V Prikhodchenko; Andrei V Churakov

doi:10.1107/S205698902000972X

dl-Piperidinium-2-carboxyl-ate bis-(hydrogen peroxide): unusual hydrogen-bonded peroxide chains

Acta Crystallogr E Crystallogr Commun. 2020 Jul 21;76(Pt 8):1331-1335. doi: 10.1107/S205698902000972X. eCollection 2020 Aug 1.

Authors

Mger A Navasardyan¹, Dmitry A Grishanov¹, Petr V Prikhodchenko¹, Andrei V Churakov¹

Affiliation

¹ Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow 119991, Russian Federation.

Abstract

The title compound, C₆H₁₁NO₂·2H₂O₂, is the richest (by molar ratio) in hydrogen peroxide among the peroxosolvates of aliphatic α-amino acids. The asymmetric unit contains a zwitterionic pipecolinic acid mol-ecule and two hydrogen peroxide mol-ecules. The two crystallographically independent hydrogen peroxide mol-ecules form a different number of hydrogen bonds: one forms two as donor and two as acceptor ([2,2] mode) and the other forms two as donor and one as acceptor ([2,1] mode). The latter hydrogen peroxide mol-ecule forms infinite hydrogen-bonded hydro-peroxo chains running along the c-axis direction, which is unusual for aliphatic α-amino acid peroxosolvates.

Keywords: aliphatic amino acids; carboxylate anions; charge assisted hydrogen bonds; crystal structure; peroxide H-bonded chains; peroxosolvates.

Grants and funding

This work was funded by Russian Foundation for Basic Research grant 20-03-00449.