Synthesis and structure of the first water-soluble chiral monomeric MnIV complex: [Δ-MnIV(biguanide)3] (ClO4)4·H2O |
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| Authors: | Amit Das Subrata Mukhopadhyay Li-Ping Lu Miao-Li Zhu |
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| Affiliation: | (1) Department of Chemistry, Jadavpur University, Calcutta, 700 032, India;(2) Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan, Shanxi, 030006, People's Republic of China |
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| Abstract: | The reaction of KMnO4 with alkaline biguanide sulfate solution, followed by acidification of the resulting stable filtrate with concentrated HClO4, led to the title complex, 1. The crystal structure of the [Δ-MnIV(bigH)3](ClO4)4·H2O (1, bigH: biguanide, C2H7N5) has a tetragonal chiral P4 1 2 1 2 space group with a = b = 11.416(3) ?, c = 20.742(7) ?, Z = 4. The complex consists of one chiral [Δ-MnIV(bigH)3] tetracation, four ClO4 − anions, and one water molecule. In the tetracation, six N atoms from three neutral biguanide chelate coordinate to the MnIV cation, forming an octahedron with Δ-optical activity. The [Δ-MnIV(bigH)3] tetracation interconnects each other by numerous hydrogen bonds with N–H···O and O–H···O between biguanide moieties of the [Δ-MnIV(bigH)3] tetracations and counter-anions as well as water molecules, to construct a three-dimensional network. |
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| Keywords: | MnIV complex biguanide chirality crystal structure |
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