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Synthese und Charakterisierung von Natriumcyanamid
Authors:M Becker  J Nuss  M Jansen
Abstract:Synthesis and Characterization of Sodium Cyanamide The synthesis of Na2CN2 was carried out by reaction of sodium amide with sodium hydrogen cyanamide at 200 °C, in vacuum. Single crystals were obtained while heating the product (500 °C, 8 days) in silver crucibles. The title compound was characterised by single crystal X‐ray diffraction and IR‐spectroscopy (C2/m; Z = 2, a = 5.0456(3), b = 5.0010(3), c = 5.5359(3) Å; β = 110.078(5)°; R1 = 3.18%, wR2 = 6.35%, GOF = 1.078). The CN22– units are linear exhibiting a C–N bond length of 1.236(1) Å, while sodium is coordinated by five nitrogen atoms forming a square pyramid. The structural relationships to aristotypic Na2HgO2 are pointed out.
Keywords:Sodium cyanamide  Crystal structure  IR spectroscopy  Raman spectroscopy
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