Preparation, crystal structure and thermal behaviour of ethylenediammonium-vanadate

• Published in: Materials research bulletin 1987-05, Vol.22 (5), p.577-583
• Main Authors: Bensch, W., Hug, P., Reller, A., Oswald, H.R.
• Format: Article
• Language: English
• Subjects: Aliphatic, non-condensed and condensed benzenic, and alicyclic compounds; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Organic compounds; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/0025-5408(87)90105-X

Ethylenediammonium-vanadate has been synthesized and the structure determined from single crystal diffractometer data. The thermal degradation to the oxide V 2O 5 has been studied by means of thermoanalytical, mass spectrometric and morphological investigations. (NH 3CH 2CH 2NH 3) 2+ (VO 3) 2 2− has been prepared by dissolving V 2O 5 in an aqueous solution of ethylenediamine (en). The unit cell is monoclinic, space group P2 1 c , M = 129.9, a = 5.533(1) A ̊ , b = 12.891(5) A ̊ , c = 5.689(1) A ̊ , β = 97.52(1)°, V = 402.3 A ̊ 3 , μ = 22.0 cm −1. Z = 2, D c = 2.161 g/cm 3, D x = 2.124 g/cm 3, λ( MoK α) = 0.7107 A ̊ . Final R and wR are 0.023 and 0.035, respectively. 1115 unique reflections with F>2 σ(F). The structure is made up of infinite (VO 3)∞ chains running parallel to the c-axis of the unit cell. These chains form layers within the a–c plane. The double protonated en molecules are located between these chains. A hydrogen bond network is observed.