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Syntheses and Crystal Structures of Two CuII Coordination Isomers [Cu(pmt)2] · 4H2O (1) and {[Cu(pmt)2] · 2H2O} n (2)

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Abstract

A pair of CuII coordination isomers [Cu(pmt)2] · 4H2O (1) and {[Cu(pmt)2] · 2H2O} n (2) [Hpmt = 2-(2-pyridylmethylamino) ethanesulfonic acid] have been prepared by reaction of the same proportion CuCl2 · 2H2O and Hpmt but with different experimental methods in water–methanol mixed solution, and were characterized by X-ray diffraction, elemental analysis, IR spectrum. X-ray analysis indicates that complex (1) is a mononuclear complex in which two deprotonated pmt ligands coordinate in a facial tridentate arrangement about the CuII atom. While complex (2) is a coordination polymer, in which four N atoms of pmt ligands coordinate to one CuII atom but its sulfonate O atoms bond to adjacent CuII atom. Thus 12-membered rings (–Cu–N–C–C–S–O–)2 are obtained between two neighbouring CuII atoms and they connect one another to form this new polymer. Crystal data: [Cu(pmt)2] · 4H2O (1), Mr = 566.10, monoclinic, P2 1/c, a = 9.1950(8) Å, b = 11.5093(10) Å, c = 11.2304(10) Å, β  = 105.5550(10)°, Z = 2, V = 1144.96(17) Å3, R 1  = 0.0407, wR 2  = 0.1242 [I > 2σ (I)]; {[Cu(pmt)2] · 2H2O} n (2), Mr = 530.07, triclinic, P-1, a = 7.6165(19) Å, b = 8.806(2) Å, c = 9.592(4) Å, α = 104.933(4)°, β = 106.732(4)°, γ = 109.503(3)°, Z = 1, V = 534.2(3) Å3, R 1 = 0.0470, wR 2 = 0.1082 [I > 2σ(I)].

Index Abstract

A pair of CuII coordination isomers [Cu(pmt)2] · 4H2O (1) and {[Cu(pmt)2] · 2H2O} n (2) [Hpmt = 2-(2-pyridylmethylamino) ethanesulfonic acid] have been prepared by reaction of the same proportion CuCl2 · 2H2O and Hpmt but with different experimental methods in water–methanol mixed solution.

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Acknowledgements

This work was funded by the Guangxi Science Foundation of the Guangxi Zhuang Autonomous Region of the People’s Republic of China (Grant No. 0731053). We also thank Luoyang Normal College and Nankai University for supporting this study.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin, Guangxi, 541004, P.R. China

    Jun-Xia Li, Yi-Min Jiang & Bi-Rong Lian

  2. College of Chemistry, Nankai University, Tianjin, 300071, P.R. China

    Jun-Xia Li

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  1. Jun-Xia Li
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  2. Yi-Min Jiang
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Correspondence to Yi-Min Jiang.

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Li, JX., Jiang, YM. & Lian, BR. Syntheses and Crystal Structures of Two CuII Coordination Isomers [Cu(pmt)2] · 4H2O (1) and {[Cu(pmt)2] · 2H2O} n (2). J Chem Crystallogr 38, 711–715 (2008). https://doi.org/10.1007/s10870-008-9365-3

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  • DOI: https://doi.org/10.1007/s10870-008-9365-3

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