12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane. Synthesis, conformational study and complexation reactions
作者:Yee-Hing Lai、Lin Ma、K.F. Mok
DOI:10.1016/0040-4020(96)00138-x
日期:1996.3
12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane 7 was prepared from a cyclization reaction of 2,9-bis(bromomethyl)phenanthroline 3. The syn isomer of 7 was kinetically favoured while the anti isomer was the thermodynamically more stable product isolated. The macrocycle 7 formed 1:1 complexes, namely 10 and 11, respectively, with zinc(II) and cadmium(II) ions. A tetragonal-pyrimidal configuration is proposed for these complexes. A comparison of the H-1 NMR spectral data of 7, 10 and 11 suggests that the complexation results in a symmetrical structure through the four nitrogen donor atoms. The sulfur atoms in the bridges do not seem to coordinate strongly to the metal ions.
Two Kinds of Intermolecular<i>π</i>-<i>π</i>Interactions Controlling the Crystalline State Structure of 12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane
The structural characterization of a dithiaphenanthrolinophane was performed. The stable structure in the crystalline state was found to be different from that in solution. The intermolecular face-to-face and edge-to-face π-π interactions of the aromatic rings play important roles in stabilization of the crystalline state conformation.