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

The title compound, C(6)H(11)NO(2)·2H(2)O(2), 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 mol­ecule and two hydrogen peroxide mol­ecules. The two crystallographically independent hydrogen peroxide mol­ecules 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 mol­ecule forms infinite hydrogen-bonded hydro­peroxo chains running along the c-axis direction, which is unusual for aliphatic α-amino acid peroxosolvates.