Synthese und Charakterisierung von Quecksilbercyanamid

Synthesis and Characterisation of Mercury Cyanamide HgCN₂ was prepared by double conversion of HgCl₂ with sodium cyanamide in aqueous solution. Its crystal structure has been determined using X‐ray powder data and refined by combined profile fits using X‐ray and neutron diffraction data (Pbca, Z = 8, a = 10.4851(1), b = 6.5138(1), c = 6.8929(1) Å; R_p (X‐ray) = 6.15%; R_p (neutrons) = 2.33; 2.43%). The cyanamide‐anion is bent (172.4(7)°), which has been confirmed by vibrational spectroscopy. Mercury and carbon form zigzag chains. Not including nitrogen, the structure is related to the MnP‐structure type.