Table of Contents
Research Letters in Inorganic Chemistry
Volume 2009 (2009), Article ID 168416, 5 pages
Research Letter

Crystal Structure of [Bis(L-Alaninato)Diaqua]Nickel(II) Dihydrate

1Department of Chemistry, Faculty of Science and Technology, Hebron University, P.O. Box 40, Hebron, West Bank, Palestine
2Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95060, USA

Received 4 December 2008; Accepted 4 February 2009

Academic Editor: Hakan Arslan

Copyright © 2009 Awni Khatib et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The title complex, [Ni ( C 3 H 6 O 2 N ) 2 ( H 2 O ) 2 ] 2 H 2 O , has been prepared from nickel(II) chloride in aqueous solution by adding L-alanine and potassium hydroxide. It has been crystallized from aqueous solution, and its structure was determined by X-ray structure analysis. The nickel(II) ion adopts distorted octahedral coordination geometry with two bidentate L-alanine molecules and two water molecules. The complex is neutral and dihydrated. The crystal structure shows the hydrogen bonding between water and amide hydrogens within the lattice, and each fragment of the complex contains two water molecules as hydrated water. The L-alaninato ligand skeleton of the compound adopts the most stable trans-III configuration in the solid state. The alternating two five-membered chelate rings are in the stable gauche conformation.