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Volumn 16, Issue 42, 2010, Pages 12570-12581

The dynamic chemistry of molecular Borromean rings and Solomon knots

Author keywords

coordination compounds; dynamic covalent chemistry; Schiff bases; self assembly; template directed synthesis

Indexed keywords

BIPYRIDYL; COORDINATION COMPOUNDS; CRYSTALLIZATION CONDITIONS; DYNAMIC COVALENT CHEMISTRY; DYNAMIC EQUILIBRIA; DYNAMIC SOLUTIONS; H NMR SPECTROSCOPY; MACROCYCLES; METAL CENTERS; REACTION CONDITIONS; ROOM TEMPERATURE; SCHIFF BASIS; SOLID-STATE STRUCTURES; SYNTHETIC CONDITIONS; SYNTHETIC PROTOCOLS; TEMPLATE-DIRECTED SYNTHESIS; TEMPLATED; TEMPLATION;

EID: 78349265801     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.201001806     Document Type: Article
Times cited : (83)

References (158)
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    • IIBR · 12TFA) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via.
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    • Other solvents have led to the successful formation of BRs, including MeOH and EtOH (ref. [27]), yet not as efficiently as iPrOH. This solvent effect on the yield and purity is likely to result from the solubility differences of the product in these solvents. BRs are soluble in EtOH and MeOH, but are not soluble in iPrOH, and therefore, precipitate upon formation, kinetically trapping the BR product.
    • Other solvents have led to the successful formation of BRs, including MeOH and EtOH (ref. [27]), yet not as efficiently as iPrOH. This solvent effect on the yield and purity is likely to result from the solubility differences of the product in these solvents. BRs are soluble in EtOH and MeOH, but are not soluble in iPrOH, and therefore, precipitate upon formation, kinetically trapping the BR product.
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    • Colorless crystals were obtained from a mixture of long needles and block prism-shaped cubes. Suitable crystals were difficult to mount as the solvent loss was very rapid even when covered with viscous oils. A suitable block prism (0.4×0.4×0.2 mm) was picked on a nylon loop with oil and used for data collection at low temperature on a Bruker Smart 1000 diffractometer with an Apex11 detector. Data were collected with a 90 s exposure time per frame. Absorption corrections were performed with SADABS and SHELXTL software package was used for structure solution and refinement. Final difference maps showed some residual peaks of missing and or disordered solvents and were not accounted for in the treatment of the X-ray crystal data. On account of the extensive disorder of the trifluoroacetate anions and solvent molecules, the weighted R factor is high.
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    • IIBR · 12TFA. Second, we have obtained X-ray crystallographic data of functionalized BRs with zinc ions occupying the interstitial sites of the crystalline superstructure. See:,.
    • 1H NMR spectrum: we continue to suspect that it exists, at least in the gas phase!
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    • 8+ backbone can interconvert between these two conformations through the same "chair flip" mechanism we have observed in the BRs
    • 2 symmetric conformations freeze out, giving rise to a larger number of signals.
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    • ⊥ tensor pattern characteristic of similar tetragonally elongated copper complexes.
    • ⊥ tensor pattern characteristic of similar tetragonally elongated copper complexes.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.