91165-30-9Relevant academic research and scientific papers
Propeller Substituents imposing Steric Restraint on Crown Ethers
Lockhart, Joyce C.,McDonnell, Martin B.,Clegg, William
, p. 365 - 367 (1984)
Crown ethers with steric restraint imposed by a three-bladed propeller substituent have been synthesised and the X-ray crystal structures of one example and its NaNCS complex indicate approximately the same conformation of the propeller but quite different conformations of the ether ring in the two; n.m.r. solution spectra indicate that the flipping of the propeller and of the crown moieties are mutually restricted in these crown ethers.
