Structure of Dibenzocrown Ethers and their H-Bonded Adducts.1. [1.5]Dibenzo-18-Crown-6 and Biphenyl-20-Crown-6: Complexes with Amidosulfuric Acid.

Autor: Sergei A. Kotlyar, Marina S. Fonari, Yurii A. Simonov, Gabriele Bocelli, Oleg V. Shishkin, Svetlana V. Shishkina, Vyacheslav V. Tkachuk, Ruslan Ya. Grygorash, Gerbert L. Kamalov
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Zdroj: Journal of Inclusion Phenomena & Macrocyclic Chemistry; Jun2005, Vol. 52 Issue 1/2, p75-84, 10p
Abstrakt: Abstract The interaction of the amidosulfuric acid NH3SO3 with 15 distal and proximal dibenzocrown ethers, including diphenyloxide, diphenylsulfide and biphenyl ones leads to the stable (1:1) complexes only in the case of [2.4]- and [1.5]dibenzo-18-crown-6 and biphenyl-20-crown-6. According to the data of the X-ray analysis, in the two last adducts the amidosulfuric acid coordinates to hexadentate crown ethers in a zwitterion form through a near-ideal tripod arrangement to alternate crown oxygen atoms. The conformations of crown molecules are different in complexes and in initial macrocyclic ligands. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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