Examination of the structure in solid state of amino analogs of 4,4′-[1,5-pentanediylbis(oxy)]bisbenzonitrile by means of X-ray diffraction, 13C CP/MAS NMR, and theoretical calculations
作者:Dorota Maciejewska、Irena Wolska、Jerzy Żabiński
DOI:10.1016/j.molstruc.2007.08.008
日期:2008.5
A single crystal of X-ray diffraction structures is presented for 4,4'-[1,5-(3-oxapentanediylbis(amino))]bisbenzonitrile 2 and 4,4'-(1,5(N-methyl-3-azapentane-diylbis(oxy))]bisbenzonitrile 3. The molecular structures of these derivatives differ especially in conformations of the central linker: in 2 this linker adopts a trans/gaitche coil formation, whereas in 3 - a fully extended conformation. The N atoms ill various positions of the aliphatic linker change dramatically the molecular packing mode of both bisnitriles. But in both cases the nitrile groups take part in intermolecular hydrogen bonds: a type of N-H center dot center dot center dot N in 2 and of C-H center dot center dot center dot N in 3. Various conformations of both molecules were reflected in C-13 CP/MAS NMR spectra in solid state as single and double resonance patterns for 2 and 3, respectively. A preliminary anticancer assay against 60 cell lines of 3 reveals strong growth inhibition of leukemia, melanoma, and renal cancer cells. (C) 2007 Elsevier B.V. All rights reserved.