Effect of Substituents on the Complexation of Aromatic and Quinoid Substrates with Molecular Tweezers and Clips
作者:Frank-Gerrit Klärner、Jolanta Polkowska、Jens Panitzky、Uta P. Seelbach、Ulrich Burkert、Markus Kamieth、Michael Baumann、Arne E. Wigger、Roland Boese、Dieter Bläser
DOI:10.1002/ejoc.200300704
日期:2004.4
and ΔG) of complexformation between the new receptors and aromatic substrates such as DCNB 21, TCNB 22, TCNQ 24 and Kosower salt 25 and the maximum complexation-induced 1HNMRshifts (Δδmax.) were determined by 1HNMR titration experiments. It was found that the presence of substituents OH, OAc and OCONHPh in the central spacer units of the tweezers and clips 1−3 favours complexformation, whereas that