shielding calculation of macro-ring

["Jerry C.C. Chan" <chan.,at,.uni-muenster.de>]

 Dear Netters,
 My colleague has a plan to calculate the 13C and 1H chemical shifts of the
 following compound:
        CH2--phi--CH2
        |         |
        |         |
        CH2--phi--CH2
 Where phi denotes a benzene ring.  We would be grateful if anyone
 could give us pointers to any published computational results of
 similar compounds.  Any other advices are equally welcome.
 Many thanks,
 Jerry
 ******************************************************************
 * Jerry Chun Chung CHAN                     chan.,at,.uni-muenster.de *
 * Universitaet Muenster	                                         *
 * Institut fuer Physikalische Chemie    fax:   0049-251-83-29159 *
 * Schlossplatz 4-7						 *
 * D-48149 Muenster						 *
 * Germany							 *
 ******************************************************************
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 <Note that the account jerry.,at,.NMR.uni-muenster.de has been expired>
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 ******************************************************************
 * Jerry Chun Chung CHAN                     chan.,at,.uni-muenster.de *
 * Universitaet Muenster	                                         *
 * Institut fuer Physikalische Chemie    fax:   0049-251-83-29159 *
 * Schlossplatz 4-7						 *
 * D-48149 Muenster						 *
 * Germany							 *
 ******************************************************************
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 <Note that the account jerry.,at,.NMR.uni-muenster.de has been expired>
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++