Solid state structure and solution conformation of a macrobicyclic cyclophane
作者:Vickie McKee、Ward T. Robinson、Debbie McDowell、Jane Nelson
DOI:10.1016/s0040-4039(00)70723-4
日期:1989.1
X-ray crystallographic structure determination of the macrobicyclic cyclophane L1 reveals a compact structure involving close edge-to-face approach of aromatic rings; 1H nmr shows that this is also the solutionconformation.
大双环环烷L 1的X射线晶体学结构测定显示出紧密的结构,该结构涉及芳香环的从边缘到表面的紧密接触。1 H nmr表明这也是溶液构象。
The NMR study of some macrocyclic and macrobicyclic Schiff bases in solution and solid state
One macrocyclic and two macrobicyclic Schiff bases have been synthesized and investigated by H-1, C-13 and N-15 NMR spectroscopy in solid state and CDCl3 solution at different temperatures. The results obtained have shown that all studied Schiff bases in CDCl3 solution at ambient temperature exist in a fast dynamical equilibrium that leads to the averaged symmetrical structure. The presence of flexible aliphatic chains and possibility-of formation of different intramolecular hydrogen bonds in H and H-1 leads to several different conformations in CDCl3 solution at low temperatures. An asymmetry of the Schiff bases molecules in solid state has been established. (C) 2002 Elsevier Science B.V. All rights reserved.
MACDOWELL, DEBBIE;NELSON, JANE, TETRAHEDRON LETT., 29,(1988) N 3, 385-386
作者:MACDOWELL, DEBBIE、NELSON, JANE
DOI:——
日期:——
MCDOWELL, DEBBIE;NELSON, JANE;MCKEE, VICKIE;DREW, MICHAEL G. B., 13TH INT. SYMP. MACROCYCL. CHEM., HAMBURG, SEPT. 4-8, 1988, FRANKFURT/M.,+
作者:MCDOWELL, DEBBIE、NELSON, JANE、MCKEE, VICKIE、DREW, MICHAEL G. B.