Molecular architecture via coordination: Marriage of crown ethers and calixarenes with molecular squares, unique tetranuclear metallamacrocycles from metallacrown ether and metallacalixarene complexes via self-assembly

Journal of the American Chemical Society

Volumn 119, Issue 22, 1997, Pages 5163-5168

  Stang, Peter J ^a   Cao, Danh H ^a   Chen, Kuanchiang ^a   Gray, Gary M ^b   Muddiman, David C ^c   Smith, Richard D ^c  

^a UNIVERSITY OF UTAH   (United States)

^b UNIVERSITY OF ALABAMA AT BIRMINGHAM   (United States)

^c PACIFIC NORTHWEST NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CALIXARENE; CROWN ETHER DERIVATIVE; MACROCYCLIC COMPOUND;

ARTICLE; CHEMICAL REACTION; CHEMICAL STRUCTURE; MASS SPECTROMETRY; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY;

EID: 0030811305     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9642267     Document Type: Article

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70. It needs to be emphasized that it is not a simple or routine matter to obtain either X-ray or mass spectral data on these unique, complex, coordinatively bonded, supramolecular species. Each experiment is a major undertaking (as is of course well-known in crystallography) with no guarantee of success. To date, we have been unable to obtain suitable single crystals of any of the complexes 5, 6, 9, and 11, and able to obtain a electrospray mass spectrum of only 5 and 9. However, once an electrospray mass spectrum or an X-ray structure is obtained on a closely related congener we are anchored and related complexes may be securely identified by careful (multinuclear NMR, IR, etc.) spectral comparisons and satisfactory elemental analyses.