作者:P. Thuéry、M. Nierlich、M. Saadioui、Z. Asfari、J. Vicens
DOI:10.1107/s0108270198013882
日期:1999.3.15
The calix[4]arene macrocycle, 25,27-dihydroxy-26,28(O,O' -azobenzene)calix[4]arene-crown-6 [which crystallizes as an N,N-dimethylformamide solvate (C48H46N2O8. C3H7NO)], in the cone conformation, has two opposite phenolic rings bridged by an -(O-CH2-CH2)(2)O-C6H4-N=N-C6H4-(O-CH2-CH2)(2)O-unit. The two other phenolic O atoms are unsubstituted. The azobenzene geometry is the more stable trans one. This structure is compared to other previously reported structures, involving differently bonded azobenzene moieties.