摘要 : The two new chiral macrocyclic complexes obtained in a template condensation of R,R-1,2-diaminocyclohexane and 2,6-diformylpyridine, [NdL] (NO3), and [TmL] (NO3)(3), have been synthesized and their X-ray crystal structures have be... 展开 The two new chiral macrocyclic complexes obtained in a template condensation of R,R-1,2-diaminocyclohexane and 2,6-diformylpyridine, [NdL] (NO3), and [TmL] (NO3)(3), have been synthesized and their X-ray crystal structures have been determined. The lanthanide(III) ions in both complexes are coordinated by a helically twisted hexadentate macrocycle and two bidentate nitrate anions. The [NdL] (NO,), and [TmL] (NO3)(3) complexes have been studied also by H-1 and C-13 NMR spectroscopy. The signal assignment was based on COSY, NOESY and HMQC measurements. The spectra of the investigated compounds in methanol-chloroform solution confirm the D-2-symmetrical helical conformation of the ligand. (C) 2000 Elsevier Science Ltd All rights reserved. [References: 21] 收起