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Synthesis, Structures, and Properties of New Discrete Hetero‐tetranuclear Metallocycle Complexes Based on Macrocyclic Oxamide Metalloligands
Author(s) -
Shi XiaoMing,
Li XiaoZeng,
Ding BeiBei,
Zhu LiNa
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200411
Subject(s) - metallacycle , crystallography , supramolecular chemistry , stacking , thermogravimetric analysis , stereochemistry , chemistry , hydrogen bond , x ray crystallography , materials science , crystal structure , molecule , physics , diffraction , organic chemistry , optics
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.