title: Coordination-driven self-assemblies with a carborane backbone.
abstract: The design and self-assembly of five new supramolecular complexes (a rectangle, a triangle, a hexagon, and two squares) are described. These assemblies incorporate carborane building blocks and were prepared in excellent yields (>85%). The assemblies and building blocks were characterized with multinuclear NMR spectroscopy, electrospray ionization mass spectrometry, and elemental analysis. Isotopically resolved mass spectrometry data confirm the existence of the rectangle, triangle, and hexagon, and NMR data are consistent with the formation of all five assemblies. The X-ray structures of two linear carborane building blocks, 1,12-(4-CC(C(5)H(4)N)(2)-p-C(2)B(10)H(10) (1) and 1,12-(trans-(Pt(PEt(3))(2)I)CC)(2)-p-C(2)B(10)H(10) (2), are reported: 1 is monoclinic, P2(1)/c, a = 10.6791(4) A, b = 8.0091(14) A, c = 11.6796(4) A, beta = 107.8461(15) degrees , V = 950.89(5) A(3), Z = 2; 2 is monoclinic, C2/c, a = 62.1128(10) A, b = 22.0071(3) A, c = 14.0494(2) A, beta = 89.9411(8) degrees , V = 19204.4(5) A(3), Z = 16. Crystals of the linear linker 1 exhibit close pi-pi pyridine and pyridine-B(carborane) interactions, which are discussed.
authors.affiliation: Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, USA.
authors.forename: Hershel
authors.initials: H
authors.lastname: Jude
authors.forename: Hendrik
authors.initials: H
authors.lastname: Disteldorf
authors.forename: Sonja
authors.initials: S
authors.lastname: Fischer
authors.forename: Tim
authors.initials: T
authors.lastname: Wedge
authors.forename: Adam M
authors.initials: AM
authors.lastname: Hawkridge
authors.forename: Atta M
authors.initials: AM
authors.lastname: Arif
authors.forename: M Frederick
authors.initials: MF
authors.lastname: Hawthorne
authors.forename: David C
authors.initials: DC
authors.lastname: Muddiman
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Stang
mesh_terms: D001880:Boranes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007553:Isotope Labeling; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011725:Pyridines / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D001880:Boranes; D011725:Pyridines