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Two-Dimensional Lanthanum-BDC Coordination Polymer:Hydrothermal Synthesis and Structure of [La4(BDC)6(H2O)5](H2O)(BDC
Two-Dimensional Lanthanum-BDC Coordination Polymer:Hydrothermal Synthesis and Structure of [La4(BDC)6(H2O)5](H2O)(BDC
Journal of the Korean Chemical Society. 2001. Dec, 45(6): 507-512
  • Published : December 00, 2001
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Kim, Hye Jin
Min, Dong Won
Heo, Hyun Su
Lee, Soon W.

Abstract
The hydrothermal reaction between lanthanum(��) nitrate $(La(NO3)3${\cdot}$6H_2O)$ and benzene-1,3-dicarboxylic acid $(H_2BDC)$ in the presence of 1,2-bis(4-pyridyl)ethane gave a 2-D lanthnum-BDC coordination polymer with an empirical formula of $��La_4$(BDC)_6(H_2O)_5$��(H_2O)$ (1). X-ray structure analysis of compound 1 revealed that this polymer contains four distinct La metals. The three La metals are 7-coordinate with three different structures: a capped trigonal prism, a capped octahedron, and a pentagonal bipyramid. The remaining La metal has a 8-coordinate, square antiprismatic structure.??��???????M???�?