Ambidentate ligands capable of variable bond angles in the coordination-driven self-assembly of discrete Pt macrocycles.
Flexible, ambidentate pyridyl-carboxylate based donor ligands such as sodium 3-(3-pyridyl)benzoate, sodium 4-(3-pyridyl)benzoate, and potassium 4-(3-pyridyl)ethynylbenzoate self-assemble into discrete [2 + 2] macrocyclic species instead of infinite networks when combined with a 90 degrees platinum-containing acceptor. In each case, only one isomeric ensemble is selectively formed in high yield. All products are characterized by electrospray ionization mass spectrometry (ESI-MS) and 31P{1H} and 1H NMR spectroscopy. They are the first examples of discrete supramolecules incorporating flexible, ambidentate donor ligands. Despite their potential versatility, these pyridyl-carboxylate donors adjust their bonding directionality to accommodate a rigid platinum acceptor in the formation of one discrete ensemble.
Chi
Ki-Whan
KW
Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea. kwchi@ulsan.ac.kr
Addicott
Chris
C
Moon
Mi-Eun
ME
Lee
Hyo Jin
HJ
Yoon
Sung Chul
SC
Stang
Peter J
PJ
D008024:Ligands; D047028:Macrocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D017671:Platinum Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
D008024:Ligands; D047028:Macrocyclic Compounds; D017671:Platinum Compounds