The crystal and molecular structure of sodium pentacyanoammineferrate(II) heptahydrate. Role of intermolecular hydrogen-bond interactions

✍ Scribed by Alejandro R. Parise; Oscar E. Piro; Eduardo E. Castellano; José A. Olabe

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 91 KB
• Volume: 319
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(01)00435-2

✦ Synopsis

The crystal and molecular structures of sodium pentacyanoammineferrate(II) heptahydrate have been determined by X-ray diffraction. The Fe N distance is longer than in the analogous iron(III) complex by 0.06 A , ; the Fe C and C N distances are similar to those for the hexacyanoferrate(II) species, although with a significant relative shortening of the trans Fe C bonds. The anions display a chain-like arrangement, with interlinking sodium ions and water molecules H-bonded to cyanide N atoms. By comparing with related structures of pentacyano-L-ferrate(II) ions (L = NO + , CN -), it results that the binding mode of the L ligand influences strongly both the first-and second-sphere metal-ligand interactions.