Publication Date:
2012-12-21
Description:
Two new discrete hetero-tetranuclear metallocycle complexes based on metalloligands, {[Zn 2 (NiL 1 ) 2 (H 2 O) 6 ] · 4H 2 O} n ( 1 ) and {[Ca 2 (NiL 2 ) 2 (CH 3 OH) 0.5 (H 2 O) 7 ] · CH 3 OH · 2H 2 O} n ( 2 ) were synthesized under self-assembly conditions and structurally determined. X-ray diffraction analyses revealed that the two compounds involve the discrete metallocyclic units, which serve as building blocks to further expand to three-dimensional supramolecular frameworks through second interactions such as hydrogen bonds and π ··· π stacking interactions. The central Zn II and Ca II ions of the compounds 1 and 2 are bridged by macrocyclic oxamido metalloligands fusing the metallocycle with “head-to-tail” arrangement. The metallocycles have Zn ··· Zn distances of 9.48 Å in 1 and Ca ··· Ca distances of 9.90 Å in 2 . Further, compounds 1 and 2 were investigated by thermogravimetric analysis.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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