Enantiospecific Assembly of a Homochiral, Hexanuclear Palladium Complex

✍ Scribed by Howard M. Colquhoun; C. Timothy Powell; Zhixue Zhu; Christine J. Cardin; Yu Gan; Paula Tootell; Josephine S. W. Tsang; Neil M. Boag

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 512 KB
• Volume: 2009
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200801045

✦ Synopsis

Abstract

The linking of orthopalladated ferrocenylene units by parabanato(2–) ligands results in enantiospecific assembly of a hexanuclear complex in which (i) the steric bulk of the ferrocenylene moiety, (ii) the folded configuration dictated by the imidato(2–) bridging ligand, and (iii) the strong preference for a trans arrangement of the carbonyl oxygen and ferrocenyl carbon atoms, combine to ensure that only ferrocenylene‐palladium units with the same chirality can be located at adjacent positions in the assembled complex. The resulting tris‐parabanato(2–)‐bridged, hexapalladium complex is thus homochiral (R,R,R,R,R,R or S,S,S,S,S,S), as demonstrated by ^1^H NMR spectroscopy and by X‐ray analysis of a racemic crystal which shows the complex to possess a tapering, twisted, trigonal‐prismatic skeleton of palladium atoms with threefold crystallographic symmetry.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)