1417575-38-2Relevant articles and documents
The crystal structure, vibrational spectra and DSC measurements of mono- β-alaninium nitrate
Nemec, Ivan,Gyepes, Robert,Micka, Zdenek
, p. 203 - 213 (1999)
An X-ray structural analysis of mono-β-alaninium nitrate has been carded out. The substance crystallizes in an orthorhombic system in the space group Pca21, a = 14.8135(11) A, b = 7.3338(5) A, c = 11.9121(12) A, V = 1294.12(18) A3, Z = 8, R = 0.0361 for 1299 observed reflections. The asymmetric unit contains two β-alaninium cations (NH3/+CH2CH2COOH) and two nitrate anions (NO3/-). The whole crystal structure is formed by β- alaninium dimers (linked by two intermediate asymmetrical hydrogen bonds of length 2.64 A) and nitrate anions connected by a system of hydrogen bonds, in which all the hydrogen atoms of the NH3/+ groups participate. Fourier transform infrared (FTIR) and FT Raman spectra of natural and deuterated crystals were recorded and interpreted. The FTIR spectra were studied down to a temperature of 90 K. Differential scanning calorimetry (DSC) measurements were carried out in the temperature range 95-370 K. No phase transition was found in this temperature range by DSC and FTIR.