ORGLIST:tetraalkyl calix[4]arene or tetraalkyl tert. buthyl calix [4] arene neutral complexes

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From: peter walla (pedwa2000$##$yahoo.com)
Date: Sun Aug 29 2004 - 13:29:17 EDT


Dear Orglisters!
 
Till date, i did not find any report about x-ray structure of peralkylated tert. buthyl calix[4]arene or calix[4]arene complexes with neutral guests like benzene or toluene. Complexes of tert. buthyl calix[4]arene or calix[4]arene with free OH groups are well described. Does also the peralkylated at all form isolable complexes with for instance benzene? If YES, is the cone- conformation retained? I am not limited to [4] calixarenes, it may be also 5,6,7,8,... or peralkyl-resorcarenes .
 
Any notice would be very helpful to me.
Thank you very much in advance!
 
Peter Walla

                
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