CRYSTAL STRUCTURES OF SEVEN-COORDINATE (NH4)2[MnII(edta)(H2O)]в‹…3H2O, (NH4)2[MnII(cydta)(H2O)]в‹…4H2O and K2[MnII(Hdtpa)]в‹…3.5H2O COMPLEXES
X.F. Wang, J. Gao, J. Wang, ZH.H. Zhang, Y.F. Wang, L.J. Chen, W. Sun, X.D. Zhang
Ключевые слова: manganese(II) chelate, ethylenediamine-N, N, N?, N?-tetraacetic acid (H4edta), trans-1, 2-cyclohexanediamine-N, N, N?, N?-tetraacetic acid (H4cydta), diethylenetriamine-N, N, N?, N?, N?-pentaacetic acid (H5dtpa)
Страницы: 753-759
Аннотация
The title compounds, (NH<sub>4</sub>)<sub>2</sub>[Mn<sup>II</sup>(edta)(H<sub>2</sub>O)]⋅3H<sub>2</sub>O (H<sub>4</sub>edta = ethylenediamine-N,N,N′,N′-tetraacetic acid), (NH<sub>4</sub>)<sub>2</sub>[Mn<sup>II</sup>(cydta)(H<sub>2</sub>O)]⋅4H<sub>2</sub>O (H<sub>4</sub>cydta = <i>trans</i>-1,2-cyclohexanediamine-N,N,N′,N′-tetraacetic acid) and K<sub>2</sub>[Mn<sup>II</sup>(Hdtpa)]⋅3.5H<sub>2</sub>O (H<sub>5</sub>dtpa = diethylenetriamine-N,N,N′,N″,N″-pentaacetic acid), were prepared; their compositions and structures were determined by elemental analysis and single-crystal X-ray diffraction technique. In these three complexes, the Mn<sup>2+</sup> ions are all seven-coordinated and have a pseudo-monocapped trigonal prismatic configuration. All the three complexes crystallize in triclinic system in <i>P</i>-1 space group. Crystal data: (NH<sub>4</sub>)<sub>2</sub>[Mn<sup>II</sup>(edta)(H<sub>2</sub>O)]⋅3H<sub>2</sub>O complex, <i>a</i> = 8.774(3) Å, <i>b</i> = 9.007(3) Å, <i>c</i> = 13.483(4) Å, α = 80.095(4)°, β = 80.708(4)°, γ = 68.770(4)°, <i>V</i> = 972.6(5) Å<sup>3</sup>, <i>Z</i> = 2, <i>D</i><sub><i/>c</sub> <br> = 1.541 g/cm<sup>3</sup>, μ = 0.745 mm<sup>-1</sup>, <i>R</i> = 0.033 and <i>wR</i> = 0.099 for 3406 observed reflections with <i>I</i> ≥ 2σ(<i>I</i>); (NH<sub>4</sub>)<sub>2</sub>[Mn<sup>II</sup>(cydta)(H<sub>2</sub>O)]⋅4H<sub>2</sub>O complex, <i>a</i> = 8.9720(18) Å, <i>b</i> = 9.4380(19) Å, <i>c</i> = 14.931(3) Å, α = 76.99(3)°, β = 83.27(3)°, γ = 75.62(3)°, <i>V</i> = 1190.8(4) Å<sup>3</sup>, <i>Z</i> = 2, <i>D</i><sub><i/>c</sub> = 1.426 g/cm<sup>3</sup>, μ = 0.625 mm<sup>-1</sup>, <i>R</i> = 0.061 and <i>wR</i> = 0.197 for 3240 observed reflections with <i>I</i> ≥ 2σ(<i>I</i>); K<sub>2</sub>[Mn<sup>II</sup>(Hdtpa)]⋅3.5H<sub>2</sub>O complex, <i>a</i> = 8.672(3) Å, <i>b</i> = 9.059(3) Å, <i>c</i> = 15.074(6) Å, α = 95.813(6)°, β = 96.665(6)°, γ = 99.212(6)°, <i>V</i> = 1152.4(7) Å<sup>3</sup>, <i>Z</i> = 2, <i>D</i><sub><i/>c</sub> = 1.687 g/cm<sup>3</sup>, μ = 1.006 mm<sup>-1</sup>, <i>R</i> = 0.037 and <i>wR</i> = 0.090 for 4654 observed reflections with <i>I</i> ≥ 2σ(<i>I</i>).
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