Organogold(I) macrocycles and [2]catenanes containing pyridyl and bipyridyl substituents — Organometallic catenanes as ligands

• Published in: Canadian journal of chemistry Vol. 84; no. 2; pp. 111 - 123
• Main Authors: Habermehl, Nicolle C, Mohr, Fabian, Eisler, Dana J, Jennings, Michael C, Puddephatt, Richard J
• Format: Journal Article
• Language: English
• Published: Ottawa, Canada NRC Research Press 01.02.2006; CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
• Subjects: Chemistry; Chemistry, Multidisciplinary; Physical Sciences; Science & Technology; TRANSITION-METAL-COMPLEXES; PI-PI STACKING; RINGS; GOLD(I) MACROCYCLES; SOLID-STATE; gold; platinum; MOLECULAR MACHINES; CHEMISTRY; macrocycle; catenane; COORDINATION POLYMERS; PRECURSORS; FUNCTIONALIZED DIACETYLIDE LIGANDS
• ISSN: 0008-4042; 1480-3291
• DOI: 10.1139/v05-229

The synthesis of achiral gold(I) macrocycles [RCH(4-C 6 H 4 OCH 2 C≡CAu) 2 (µ-Ph 2 PZPPh 2 )] and the corresponding chiral gold(I) [2]catenanes, bearing substituents R = 2-pyridyl, 4-pyridyl, and 4-(2,2′-bipyridyl), is reported. The gold(I) compounds form by self-assembly on reaction of oligomeric digold(I) diacetylides [{RCH(4-C 6 H 4 OCH 2 C≡CAu) 2 } n ] or the isocyanide complexes [RCH(4-C 6 H 4 OCH 2 C≡CAuC≡N-t-Bu) 2 ] with diphosphine ligands Ph 2 PZPPh 2 , Z = CC or (CH 2 ) n with n = 2–5, or on reaction of [Au 2 (O 2 CCF 3 ) 2 (µ-Ph 2 PZPPh 2 )] with diacetylenes RCH(4-C 6 H 4 OCH 2 C≡CH) 2 in the presence of a base. The equilibrium between macrocycles and chiral [2]catenanes in solution was established by NMR spectroscopy, while the structures of several [2]catenanes in the solid state were established crystallographically. The coordination of the gold(I) compounds with R = 4-(2,2′-bipyridyl) to platinum(IV), by formation of the corresponding [PtIMe 3 (bipy)] units, is established, showing that organometallic [2]catenanes can act as ligands.Key words: gold, macrocycle, catenane, platinum.