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Syntheses and Characterization of Two Dicyanamide Compounds Containing Monovalent Cations: Hg2[N(CN)2]2 and Tl[N(CN)2]

1
Chair of Solid-State and Quantum Chemistry, Institute of Inorganic Chemistry, RWTH Aachen University, 52056 Aachen, Germany
2
Max-Planck-Institut für Kohlenforschung, 45470 Mülheim an der Ruhr, Germany
*
Author to whom correspondence should be addressed.
Inorganics 2018, 6(4), 135; https://doi.org/10.3390/inorganics6040135
Received: 6 December 2018 / Revised: 12 December 2018 / Accepted: 13 December 2018 / Published: 18 December 2018
(This article belongs to the Section Inorganic Solid-State Chemistry)
Crystals of Hg2[N(CN)2]2 were grown by a slow diffusion-reaction between aqueous Hg2(NO3)2·2H2O and Na[N(CN)2]. Hg2[N(CN)2]2 adopts the triclinic space group P 1 ¯ (no. 2) with a = 3.7089(5), b = 6.4098(6), c = 8.150(6) Å, α = 81.575(6)°, β = 80.379(7)°, γ = 80.195(7)°, and Z = 1. Crystals of Tl[N(CN)2] were obtained from the reaction of TlBr with Ag[N(CN)2] in water. Single-crystal structure analyses evidence that Tl[N(CN)2] is isotypic to α-K[N(CN)2] and adopts the orthorhombic space group Pbcm (no. 57) with a = 8.5770(17), b = 6.4756(13), c = 7.2306(14) Å, and Z = 4. Regarding volume chemistry, the dicyanamide anion occupies ca. 44 cm3·mol−1, and so it corresponds to a large pseudohalide. The IR spectra of both compounds exhibit vibrational modes that are characteristic of the dicyanamide anion. View Full-Text
Keywords: dicyanamide; mercury; thallium; crystal structure; volume chemistry; IR spectrum; metathesis dicyanamide; mercury; thallium; crystal structure; volume chemistry; IR spectrum; metathesis
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MDPI and ACS Style

Mann, M.; Reckeweg, O.; Nöthling, N.; Goddard, R.; Dronskowski, R. Syntheses and Characterization of Two Dicyanamide Compounds Containing Monovalent Cations: Hg2[N(CN)2]2 and Tl[N(CN)2]. Inorganics 2018, 6, 135.

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