title: Construction of coordination-driven self-assembled [5 + 5] pentagons using metal-carbonyl dipyridine ligands.
abstract: The coordination-driven self-assembly of two metal-carbonyl-cluster-coordinated dipyridyl donors, (4-C(5)H(4)N)(2)C[triple bond]CCo(2)(CO)(6) (1) and (4-C(5)H(4)N)(2)C[triple bond]CMo(2)Cp(2)(CO)(4) (2), with a linear diplatinum(II) acceptor ligand was investigated. The structures of the resulting self-assembled polygons were found to be controlled by the steric bulk of the metal-carbonyl cluster adduct. The use of a sterically less imposing ligand 1 resulted in a pentagon-hexagon mixture, which was characterized by electrospray ionization time-of-flight mass spectroscopy. The exclusive formation of a [5 + 5] pentagon was achieved by the self-assembly of the bulkier molybdenum donor ligand 2 with a linear organoplatinum(II) acceptor ligand. Molecular force field modeling was used to study the structural details of the pentagonal and hexagonal architectures. The first Fe(3)-Co(6)-Pt(6) trimetal [3 + 3] hexagon was also synthesized via the combination of 1 with a 120 degrees ferrocenyldiplatinum(II) acceptor.
authors.affiliation: Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, USA. liangz@chem.utah.edu
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Koushik
authors.initials: K
authors.lastname: Ghosh
authors.forename: Yaorong
authors.initials: Y
authors.lastname: Zheng
authors.forename: Matthew M
authors.initials: MM
authors.lastname: Lyndon
authors.forename: Taufika Islam
authors.initials: TI
authors.lastname: Williams
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Stang
mesh_terms: D003461:Crystallography; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011725:Pyridines / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D008024:Ligands; D011725:Pyridines