Preparation and Structure of Melemium Melem Perchlorate HC6N7(NH2)3ClO4·C6N7(NH2)3

Authors

  • Andreas Sattler,

    1. München, Department Chemie und Biochemie der Ludwig-Maximilians-Universität
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  • Wolfgang Schnick Prof. Dr.

    Corresponding author
    1. München, Department Chemie und Biochemie der Ludwig-Maximilians-Universität
    • Department Chemie und Biochemie, Lehrstuhl für Anorganische Festkörperchemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5–13 (D), D-81377 München, Germany, Fax: +49-(0)89-2180-77440
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Abstract

A new perchlorate salt of melem (2,6,10-triamino-s-heptazine, C6N7(NH2)3) was obtained from an aqueous solution of HClO4 at lower concentration than the ones reported for the synthesis of melemium perchlorate monohydrate (HC6N7(NH2)3)ClO4·H2O. The new salt was identified as melemium melem perchlorate (HC6N7(NH2)3)ClO4·C6N7(NH2)3 representing a melem adduct of water free melemium perchlorate. The crystal structure was solved by single-crystal X-ray methods (equation image, no. 2, Z = 2, a = 892.1(2), b = 992.7(2), c = 1201.5(2) pm, α = 112.30(3), β = 96.96(3), γ = 95.38(3)°, V = 965.8(4)·106 pm3, 4340 data, 387 parameters, R1 = 0.039). Melemium melem perchlorate crystallizes in a layer-like structure containing both protonated HC6N7(NH2)3 and non protonated C6N7(NH2)3 moieties in the coplanar layers as well as perchlorate ions between them, all of which being interconnected by hydrogen bonds. Vibrational spectroscopic investigations (FTIR and Raman) of the salt were conducted.

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