Molecular interactions of zinc(II) cyclams toward maleate and fumarate anions

Inorganic Chemistry Communications

Volumn 9, Issue 5, 2006, Pages 514-517

  Kim, Ju Chang ^a   Lough, Alan J ^b   Park, Hanyoung ^a   Kang, Y C ^a  

^a Pukyong National University   (South Korea)

^b UNIVERSITY OF TORONTO   (Canada)

Author keywords

Coordination polymer; Crystal structure; Cyclam; Zinc(II) complex

Indexed keywords

EID: 33646125213     PISSN: 13877003     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.inoche.2006.02.024     Document Type: Article

References (14)

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10. -1): 3379 (OH), 3174 (NH), 1694, 1554(COO).
11. TG-DTA curves for 1 showed a first weight loss of 4.5% (calculated 4.5%) over 85-140 °C with an endothermic processes centered at 126 °C, corresponding to the loss of a molecule of water. On further heating, gradual weight loss was observed in 275-585 °C range with the loss of maleate and cyclam ligands. Finally, the ZnO residue (observed 20.4%, calculated 20.4%) was remained above 585 °C. For complex 2, the TGA analysis was hampered by its thermal unstability even at room temperature. It was only possible to identify the dehydration of six water molecules (two coordinated and four uncoordinated), which started even at ∼26 °C and completed with the weight loss of 23.5% (calculated 22.1%) at 105 °C. Significant weight loss was observed gradually on further heating presumably due to the loss of the macrocyclic ligand and the fumarate anion. No residues were observed above 950 °C.
12. 2 = 0.0811 [I > 2σ(I)].
13. Otwinowski Z., and Minor W. Meth. Enzymol. 276 (1997) 1783
14. G.M. Sheldrick, SHELXTL{minus 45 degree rule}PC V5.1, Bruker Analytical X-ray Systems, Madison (WI), 1997.