Infrared Studies of Mixed Ligand Complexes of mercuric cyanide

Abstract

The structure of (i) NaHg(CN),(CI)(H,O), (ii) NaHg(CN),(Br)(H,O), (iii) NaHg(CN),(CNS)(H,O), (iv) KHg(CN),(Br) and (v) KHg(CN),(CNS) has been studied by infrared spectroscopy. The structure of the anions of I, I11 and V complexes have been derived on the basis of characteristic absorption frequencies and other known properties and of I1 and I V on the basis of analogy as the CN groups in these complexes are infrared inactive. CN in these anions are linked as cyanide groups and SCN as isothiocyanate group in V. In 111 SCN is present both as thiocyanate and isothiocyanate group. I11 is monomeric with water as a coordinating group. In I and I1 water is not expected to be a ligand to Hg.Anions of I, 11, I V and Y are predominantly dimeric with CN &s bridging group in the first three and SCN in V.'

Über ternäre Pseudohalogeno‐dicyanomercurate(II) MHg(CN)2X (M = Na, K, Rb, Cs; X = NCO, NCS und N3)

“…I n der Literatur waren Angaben iiber die Verbindungen NaHg(CN),N, . H,O 191, MaHg(CN),SCN * 2 H,O, KHg(CN),SCN [11][12][13] und KHg(CN),N, [lo] zu finden, die durch Kristallisation aus waWrigen Losungen zu erhalten sind. Wahrend die Kristalle der Azidokoniplexe lediglich kristalloptisch vermessen wurden [9], konnteii die IR-Spektren der Thiocyanato-dicyanomercurate unter der Annahme di-p-CN-vtrbruckter Einheiten mit tetraedrisch koordiniertem Hg(I1) iiiterpretiert werden [la, 131.…”