Structural studies on sulfonylbicyclo[n.2.0]alkan-1-ols
Author(s)
Healy, PC
Loughlin, WA
McCleary, MA
Pierens, GK
Rowen, CC
Year published
2002
Metadata
Show full item recordAbstract
The structures of a series of sulfonylbicyclo[n.2.0]alkan-1-ols (n = 3-6) 1-6 were determined by single-crystal x-ray diffraction. A survey of the Cambridge Structural Database and Monte Carlo conformational searches using MacroModel were performed. Compounds 1, 3 and 4 show intramolecular hydrogen bonding. Compound 2 is stabilized by three-centered bifurcated intra- and intermolecular hydrogen bonds between the hydroxyl proton and the sulfone oxygens. Compounds 5 and 6 are stabilized by intermolecular hydrogen bonds formed between the trans 1-hydroxy and sulfonyl moieties. In compounds 1-6, the degree of cyclotorsion of the ...
View more >The structures of a series of sulfonylbicyclo[n.2.0]alkan-1-ols (n = 3-6) 1-6 were determined by single-crystal x-ray diffraction. A survey of the Cambridge Structural Database and Monte Carlo conformational searches using MacroModel were performed. Compounds 1, 3 and 4 show intramolecular hydrogen bonding. Compound 2 is stabilized by three-centered bifurcated intra- and intermolecular hydrogen bonds between the hydroxyl proton and the sulfone oxygens. Compounds 5 and 6 are stabilized by intermolecular hydrogen bonds formed between the trans 1-hydroxy and sulfonyl moieties. In compounds 1-6, the degree of cyclotorsion of the four- five-, six-, seven- and eight-membered rings adjacent to the bond between the bridgehead atoms C1 and C4 is reflected in the magnitude about the exterior angles about C1 (C2 - C1 - Cx) and C4 (C3 - C4 - C5). The six-membered ring systems of 2, 5 and 6 showed noteworthy increases in the C5 - C4 - C1 - Cx and C3 - C4 - C1 - C2 torsion angles, and this was attributed to the conformational constraints of the pseudo-chair conformation of the six-membered ring. Similar conformational structure effects were observed in the modeled structures 1a-6a to those observed for the x-ray structures 1-6.
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View more >The structures of a series of sulfonylbicyclo[n.2.0]alkan-1-ols (n = 3-6) 1-6 were determined by single-crystal x-ray diffraction. A survey of the Cambridge Structural Database and Monte Carlo conformational searches using MacroModel were performed. Compounds 1, 3 and 4 show intramolecular hydrogen bonding. Compound 2 is stabilized by three-centered bifurcated intra- and intermolecular hydrogen bonds between the hydroxyl proton and the sulfone oxygens. Compounds 5 and 6 are stabilized by intermolecular hydrogen bonds formed between the trans 1-hydroxy and sulfonyl moieties. In compounds 1-6, the degree of cyclotorsion of the four- five-, six-, seven- and eight-membered rings adjacent to the bond between the bridgehead atoms C1 and C4 is reflected in the magnitude about the exterior angles about C1 (C2 - C1 - Cx) and C4 (C3 - C4 - C5). The six-membered ring systems of 2, 5 and 6 showed noteworthy increases in the C5 - C4 - C1 - Cx and C3 - C4 - C1 - C2 torsion angles, and this was attributed to the conformational constraints of the pseudo-chair conformation of the six-membered ring. Similar conformational structure effects were observed in the modeled structures 1a-6a to those observed for the x-ray structures 1-6.
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Journal Title
Journal of Physical Organic Chemistry
Volume
15
Publisher URI
Copyright Statement
© 2002 John Wiley & Sons, Ltd. Self-archiving of the author-manuscript version is not yet supported by this publisher. Please refer to the journal link for access to the definitive, published version or contact the author for more information.
Subject
Organic chemistry
Physical chemistry
Theoretical and computational chemistry