Growth and characterization of L-prolinium phosphite

• New L-prolinium phosphite crystal was grown.
• Crystal structure was determined.
• The crystal is characterized by vibrational spectral, thermal, NLO properties.

Single crystal of L-prolinium phosphite was grown by evaporation method from aqueous solution. It crystallizes in the orthorhombic system (space group P212121, Z = 4). The asymmetric unit contains one L-prolinium cation and one phosphite (HPO2(OH))− anion. The phosphite anions form a chain by hydrogen bond OH…O with O…O distance 2.5601(15) Å parallel [0 1 0]. The L-prolinium cations bridge two chains of anions by OH…O and NH…O hydrogen bonds with O…O and N…O distances 2.505(2) Å and 2.718(2) Å respectively. The infrared and Raman spectra are registered and discussed. Thermal behavior was studied. Phase-matched SHG was observed.