Oxacalix[3]arene Complexes with the ReI(CO)3 Fragment

Oxacalix[3]arenes p-methyloxacalix[3]arene (L1), p-isopropyloxacalix[3]arene (L2), and p-ethoxycarbonyloxacalix[3]arene (L3) are able to bind the ReI(CO)3 moiety with two of their three phenol-O atoms and one of their ether-O atoms. The monoanionic complexes were isolated in the salts (DBUH)[Re(CO)3...

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Bibliographic Details
Published in:Inorganic chemistry 2006-08, Vol.45 (17), p.6688-6693
Main Authors: Hinrichs, Matthias, Hofbauer, Florian R, Klüfers, Peter, Suhanji, Mihael
Format: Article
Language:English
Online Access:Get full text
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Summary:Oxacalix[3]arenes p-methyloxacalix[3]arene (L1), p-isopropyloxacalix[3]arene (L2), and p-ethoxycarbonyloxacalix[3]arene (L3) are able to bind the ReI(CO)3 moiety with two of their three phenol-O atoms and one of their ether-O atoms. The monoanionic complexes were isolated in the salts (DBUH)[Re(CO)3(L1H- 2)]·L1 (1) and (NEt4)[Re(CO)3(L2H- 2)]·L2·0.5 MeCN (2) (DBU = 1,8-diazabicyclo[5.4.0]undec-7-ene). Over the course of its reaction with (NEt4)2[Re(CO)3Br3] and DBU, p-ethoxycarbonyloxacalix[3]arene decomposes to form [{Re(CO)3(L4H- 2)}2] (3) {L4 = 1-(5-ethoxycarbonyl-2-hydroxy-3-hydroxymethyl-benzyl)-2,3,4,6,7,8,9,10-octahydro-pyrimido[1,2-a]azepin-1-ium. The expected monoanion [Re(CO)3(L3H- 2)]- (4) was identified by 13C NMR and mass spectra.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic0603048