cavity size in crowns



 Dear Netters!
  I'm looking for references to algorithms or programs which are used to
 calculate cavity sizes in crown ethers. Also, I would like to know about
 molecular modelling packages, which can be estimate this parameter.
 Thanks in advance.
 Dmitry
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  Dmitry E. Dmitriev,                 ** E-mail:  dmit { *at * } nmr1.ioc.ac.ru
  NMR Centre     Moscow               **          *****************
  N.D. Zelinsky Inst. of Org. Chem.,  ** tel   :  7 (095) 135 90 94
  Russian Academy of Sciences         ** fax   :  7 (095) 135 53 28
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