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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 29, Number 12
BKCSDE 29(12)
December 20, 2008 
 
Title
 Unexpected Formation of the Cobalt-Formate Coordination Polymer [Co3(HCO2)6]·dmf
from Co(NO3)2 and 2,2'-Bipyridine-5,5'-dicarboxylic Acid in dmf-EtOH-H2O
Author
 Hyun Sue Huh, Soon W Lee*
Keywords
 2,2'-Bipyridine-5,5'-dicarboxylate, Decarboxylation, Formate, Guest molecules, Desorptionresorption
Abstract
 Under hydro(solvo)thermal conditions, the cobalt-formate coordination polymer [Co3(HCO2)6]·dmf (1·dmf) was formed from Co(NO3)2 and 2,2'-bipyridine-5,5'-dicarboxylic acid (bpdcH2) in a mixed solvent of dmf, EtOH, and H2O. Polymer 1·dmf contains a formate ligand (HCO2 ?), which may have been formed by decarboxylation of bpdcH2 or hydrolysis of dmf. Heating up 1·dmf at 150 ºC removed the dmf guests to give crystalline [Co3(HCO2)6] (1), a guest-free form of 1·dmf. By immersing polymer 1 into several solvents (guests), we could obtain the corresponding guest-containing crystals of the formula of 1·guest (guest = CH3CN, acetone, or thf). The dimensions of the unit-cell volumes of these crystals depended on the contained guests in increasing order of 1·CH3CN < 1 < 1·thf < 1·acetone < 1·dmf.
Page
 2383 - 2389
Full Text
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