Early Members of a Homologous Series Based on Linked GeM2 Triangles, (MCo, Fe): Structures of [Ge2Co4Fe2(CO)21] and [Ge3Co8(CO)26]

✍ Scribed by Skelte G. Anema; Prof. Kenneth M. Mackay; Laurie C. McLeod; Dr. Brian K. Nicholson; Jan M. Whittaker

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 258 KB
• Volume: 25
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.198607591

✦ Synopsis

to the parallel arene rings (which are inaccessible from the rear side) of the cyclophane ( B).I". 18] I I By virtue of the q6-bonding, 2 differs markedly from the analogous Menshutkin complexes, in which there is no central c0ordination.1~~ The bonding in 2 can be explained quite well, however, in terms of the MO models already used in the case of the corresponding TI' and Pb" complexes-dominance of the interaction between the HO-MOS of the arenes and the p-orbitals of the metal atoms, which have the same symrnetry.l6l It is significant that no stereochemical activity of the lone pair in the sense of ligand-free polyhedral corners is recognizable, either in 1 or in 2. Here-and in the $-bonding-the stabilization of the 6s2 level, known as the inert pair effect, manifests itself. Due to the excessively long Bi-C bond lengths the new complexes must be classed among compounds with "weak interactions". The influence of the arene ligand is so great, however, that a relationship with the structure of BiCI3 no longer exists in 1 and 2.