91165-33-2Relevant academic research and scientific papers
Structure and Dynamics of Crowns containing the Phenyldinaphthylmethane Subunit (a Three-bladed Propeller): Observations of Correlated Rotation of The Propeller Blades and Certain Ether Segments
Lockhart, Joyce C.,McDonnell, Martin B.,Clegg, William,Hill, M. N. Stuart
, p. 639 - 650 (2007/10/02)
We describe some crowns (dinaphthopolyoxacycloalkanins) containing the phenyldinaphthylmethane subunit, regarded as a propeller, the aryl rings (blades) of which are fluxional, twisting about the aryl-methine bonds.This torsional propeller movement is flu
Propeller Substituents imposing Steric Restraint on Crown Ethers
Lockhart, Joyce C.,McDonnell, Martin B.,Clegg, William
, p. 365 - 367 (2007/10/02)
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.
