Peer-Reviewed Journal Details
Mandatory Fields
ARNAUDNEU, F,CREMIN, S,CUNNINGHAM, D,HARRIS, SJ,MCARDLE, P,MCKERVEY, MA,MCMANUS, M,SCHWINGWEILL, MJ,ZIAT, K
1991
April
Journal Of Inclusion Phenomena And Molecular Recognition In Chemistry
SYNTHESIS, X-RAY CRYSTAL-STRUCTURE AND CATION BINDING-PROPERTIES OF A TETRAHOMODIOXACALIX[4]ARENE TETRAESTER
Published
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Optional Fields
CALIXARENES X-RAY STRUCTURE STABILITY CONSTANTS COMPLEXATION PHASE TRANSFER
10
329
339
Treatment of p-t-butyltetrahomodioxacalix[4]arene with ethyl bromoacetate yields a tetraester derivative (4) whose crystal and molecular structure have been determined and whose ion binding properties have been assessed by phase transfer and stability constant measurements. Colorless transparent triclinic crystals (obtained from methoxyethanol) C62H84O14, a = 10.347(2), b = 11.583(2), c = 13.448(3) angstrom, alpha = 72.04(2), beta = 86.50(2), gamma = 81.23(2)degrees, space group P1BAR, Z = 1, Mo K-alpha radiation chi = 0.70930 angstrom. Refinement was carried out using 2221 reflections with I >1.5-sigma(I). The complexation properties resemble those of calix[6]arene hexaester (6), although weaker, with a preference for the larger alkali cations. Ca2+ and Ba2+, though not extracted, are more strongly complexed than alkali cations. Eu3+ is better complexed than Na+.
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