The Crystal Structures of the Cu-M (M=Mn, Ca) Mixed Metal Formates: Their Multidimensional Polymeric Network Revisited
Philippine Journals Online
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| Title |
The Crystal Structures of the Cu-M (M=Mn, Ca) Mixed Metal Formates: Their Multidimensional Polymeric Network Revisited
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| Creator |
Julita C Robles; Chemistry Department, De La Salle University-Manila
Wyona C Patalinghug; Chemistry Department, De La Salle University-Manila |
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| Subject |
Chemistry
metal organic framework, mixed metal formates, Cu-Mn formate, Cu-Ca formate |
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| Description |
The addition of a stoichiometric amount of the salt of the second metal (MnCl2 or CaCO3) to a solution of CuCO3·Cu(OH) 2 in 20% formic acid produced a coordination polymer with two metal sites that are connected through a series of formate bridges. The analysis of the crystal structure of the compound, Cu0.94Mn1.06 (HCOO) 4·4H2O (1), reveals that it belongs to the monoclinic crystal system with the space group P21/c. The dimensions of the unit cell are a = 8.8241(18) Å, b = 7.1880(14) Å , c = 9.3405(19) Å, β= 97.24(3)°, and V = 587.7(2) Å 3, while the results for the structure determination of Ca2Cu(HCOO) 6 (cyrstal 2) shows that it belongs to the monoclinic space group, C2/c with the cell dimensions of a = 22.3524(45) Å, b = 8.7370(17) Å, c = 6.3200(13) Å, β = 101.462(39)°, and V = 1209.6(4) Å 3.The Cu-Mn mixed metal formate forms a two-dimensional network of Cu -OCO-Mn linkages with the Cu center surrounded with six formate ligands, while the Mn metal center exhibited a mixed coordination environment consisting of two formate ligands and 4 molecules of coordinated water. The Ca2Cu(HCOO) 6 (2) forms a multidimensional network of Cu-OCO-Ca linkages with the Cu center forming a hexaformate coordination environment while the Ca metal center is surrounded by seven formate ligands in a distorted pentagonal bipyramid structure. Keywords: metal organic framework, mixed metal formates, Cu-Mn formate, Cu-Ca formateDOI: 10.3860/jrsce.v4i2.450 JRSCE Vol.4(2) 2007 pp.31-44
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| Publisher |
De La Salle University-Manila
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| Date |
2008-07-21
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| Type |
Non-refereed item
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| Format |
application/pdf
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| Identifier |
http://www.philjol.info/index.php/JRSCE/article/view/450
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| Source |
Journal of Research in Science, Computing and Engineering; Vol 4, No 2 (2007); 31-44
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| Language |
en
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| Coverage |
Philippines
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