Self-assembly of neutral platinum-based supramolecular ensembles incorporating oxocarbon dianions and oxalate.
Five neutral platinum-based macrocycles incorporating cyclic oxocarbondianions, squarate and croconate and their acyclic analogue, oxalate, have been synthesized in 90-95% yield via self-assembly. The combination of the diplatinum molecular clip with all three dianions afforded molecular rectangles, whereas a platinum-based 60 degrees acceptor unit produced a supramolecular rhomboid with croconate ion but a triangle with squarate ion. In all cases, multinuclear NMR spectra were consistent with the formation of single highly symmetrical species. The three rectanglular and the rhomboid assemblies were characterized by single-crystal X-ray crystallography. The triangular species was characterized by FAB mass spectrometry.
Das
Neeladri
N
Contribution from the Department of Chemistry, University of Utah, Salt Lake City, 84112, USA.
Ghosh
Ashutosh
A
Arif
Atta M
AM
Stang
Peter J
PJ
D000838:Anions; D002244:Carbon / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D010070:Oxalates / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D017671:Platinum Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods
D000838:Anions; D010070:Oxalates; D010087:Oxides; D017671:Platinum Compounds; D002244:Carbon