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Title: 12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane. Synthesis, conformational study and complexation reactions
Authors: Lai, Y.-H. 
Ma, L.
Mok, K.F. 
Issue Date: Mar-1996
Citation: Lai, Y.-H., Ma, L., Mok, K.F. (1996-03). 12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane. Synthesis, conformational study and complexation reactions. Tetrahedron 52 (13) : 4673-4678. ScholarBank@NUS Repository.
Abstract: 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 1H 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.
Source Title: Tetrahedron
ISSN: 00404020
DOI: 10.1016/0040-4020(96)00138-X
Appears in Collections:Staff Publications

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