Cyclic oxyphosphoranes

Kumara Swamy, K. C. ; Burton, Sarah D. ; Holmes, Joan M. ; Day, Roberta O. ; Holmes, Robert R. (1995) Cyclic oxyphosphoranes Phosphorus, Sulfur, and Silicon and the Related Elements, 100 (1). pp. 67-86. ISSN 1042-6507

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A review of pertinent information on cyclic oxyphosphoranes is presented. X-ray structures and variable temperature 1H NMR investigations of cyclic pentaoxyphosphoranes reveals a preference for a boat conformation for saturated six-membered rings in apical-equatorial orientations of trigonal bipyramids. These studies includes five-, six-, and seven-membered rings and show that the solid state structures are retained in solution. Apical-equatorial ring pseudorotations are more facile for five-membered rings, whereas ligand exchange via diequatorial ring placement is more facile for the larger rings. The importance of the apical-equatorial ring orientation for phosphorinanes appearing as trigonal bypyramidal intermediates in enzymatic reactions of cyclic AMP analogs is emphasized.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Ltd.
Keywords:Cyclic Oxyphosphorane; Trigonal Bipyramid; Berry Pseudorotation; Cyclic AMP
ID Code:29625
Deposited On:23 Dec 2010 05:45
Last Modified:07 Jun 2011 06:19

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