Interaction of lysine with iodic acid

A new compound in the Lys-HIO3-H2O system (where Lys = lysine), lysine-iodi c acid (1/3), C6H14N2O2. 3HIO(3), has been discovered. Its crystals display nonlinear optical properties. They were investigated by X-ray analysis, IR spectroscopy and NQR methods. The parameters of the unit cell are a = 8.36 0(2), b = 6.330 (1), c = 14.750 (3) Angstrom, beta = 92.86 (3)degrees, D-x = 2.87 Mg m(-3), space group P2(1), Z = 2. The three iodate groups in the s tructure have different roles. Interaction of lysine and iodic acid results in a compound containing a doubly protonated lysine cation and two counter ions, IO3- and I2O5OH-.