Results and Discussion
The title complex crystallized in the triclinic system with theP 1 space group. The unit cell comprises one lysine, one mandelic
and two water molecules (Figure 1). The lysine exists in the cationic
form in which backbone (N1) and side chain (N2) amino groups are
protonated and carboxylic acid group is deprotonated. The mandelic acid
carries a negative charge due to the loss of proton from the carboxylic
acid moiety. This proton is transferred to the lysine side chain amino
group (N2). In the crystal, lysine in the cationic form and mandelic
acid in the anionic form and thus charge neutrality was achieved.