- Turkish Journal of Chemistry
- Vol: 32 Issue: 2
- Synthesis and X-Ray Structural Studies of Amino Acids Half Sandwich Complexes of Osmium(II)
Synthesis and X-Ray Structural Studies of Amino Acids Half Sandwich Complexes of Osmium(II)
Authors : Raja Adil Sarfraz, Tasneem Gul Kazi, Shahid Iqbal, Hassan Imran Afridi
Pages : 237-247
View : 15 | Download : 5
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :The amino acids complexes of osmium(II), i.e. [Os(h 6-p-cymene)(h1-N-(rac)-phenylglycine methyl ester)Cl2] (A) and [Os(h 6-p-cymene) (h1-N,N'-(S)-phenylalanine amido) Cl] (B), were prepared by an ultrasound energy-assisted method at room temperature. The solid structures of the newly synthesized complexes were determined by single crystal X-ray analysis. In A, osmium is bonded to 2 chloride ligands, the h 6-coordinated p-cymene molecule, and to a nitrogen atom of the corresponding amino acid derived ligand, whereas in the case of B the central osmium is surrounded by an N, N' bidentate amino amide ligand, by an h 6-coordinated p-cymene molecule, and a chloride ligand. Both complexes have a pseudo-tetrahedral geometry. As shown by X-ray structure, A exhibited racemization of the corresponding ligand. The ligand retained its configuration in B with co-crystallization of the 2 diastereomers, ROsSC and SOsSC, in a single crystal.Keywords : Osmium, X-Ray studies, N ligands, Amino acids, Half sandwich Complexes