Acta Crystallographica Section E Structure Reports Online (Impact Factor: 0.35). 10/2008; 64(Pt 10):o2001. DOI: 10.1107/S1600536808030250
Source: PubMed

ABSTRACT The asymmetric unit of the title compound, C(20)H(24)O(6), contains two mol-ecules that are identical within standard deviations concerning bond lengths and angles as well as their conformations. In the crystal structure, weak C-H⋯O inter-actions help to consolidate the packing.

Download full-text


Available from: James L Wardell, Sep 26, 2015
18 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cyclization reactions of Fe{C5H4OCH2(CH2OCH2)nCH2OTs}2 (n = 1, 2) with C6H4-1,2-(OH)2, C6H4-1,3-(OH)2, and Fe(C5H4OAc)2 under basic conditions yield the corresponding macrocyclic 1,1′-ferrocenophanes. The ferrocenophane having a pyrido-crown ether structure was also synthesized. These ferrocenophanes were characterized by X-ray crystallography and NMR spectroscopy. Cyclic voltammograms of the ferrocenophanes exhibited reversible redox peaks assigned to the oxidation and reduction of the ferrocene unit. The macrocyclic pyrido-containing ferrocenophane forms pseudorotaxane with [NH2{(CH2)9Me}2]BARF (BARF = B{C6H3-3,5-(CF3)2}4) in CDCl3.
    Journal of Organometallic Chemistry 11/2010; 695(23):2512-2518. DOI:10.1016/j.jorganchem.2010.07.028 · 2.17 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The co-crystal, C7H9N4O2 +·ClO4 −·C20H24O6·3.25H2O, consists of theobrominium (3,7-di­methyl-2,6-dioxo-1H-purin-9-ium) cations, perchlorate anions and dibenzo-18-crown-6 and water mol­ecules. The crown ether is in a bent conformation, in which the planes of the aromatic rings subtend an angle of 63.7 (1)°. Inter­molecular O—H⋯O hydrogen bonding between the water mol­ecules and the O atoms of the cyclic ether delimit an empty space reminiscent of a hollow cage. The water mol­ecules are additionally linked to the cations by N—H⋯O hydrogen bonding. One of the positions of the water molecules is occupied only fractionally (25%) and is located outside this framework.
    Acta Crystallographica Section E Structure Reports Online 07/2013; 69(Pt 7):o1027. DOI:10.1107/S1600536813014463 · 0.35 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Reactions of p-nitrophenylchlorocarbene (PNPCC) with various dibenzo crown ethers produce O-ylides and π-complexes; the reactions can be followed via the spectral signatures of the carbene and the products. The O-ylides form most rapidly, but over time they decay in favor of the more stable π-complexes. Extensive computational studies support and refine appropriate structural and mechanistic conjectures. Reactions of PNPCC with monobenzo crown ethers afford only the spectral signatures of O-ylides; monobenzo π-complexes are either not formed in significant concentrations or are spectroscopically silent.
    The Journal of Physical Chemistry A 08/2014; 118(32). DOI:10.1021/jp506154s · 2.69 Impact Factor
Show more