Jump to main content
Jump to site search

Issue 0, 1971
Previous Article Next Article

The hydrogen fluoride solvent system. Part IV. Solutions of mercury(II) cyanide. Evidence for the Hg2(CN)3+ cation

Abstract

Cryoscopic, conductimetric, and spectroscopic methods have been used to study solutions of Hg(CN)2 in anhydrous HF. It is concluded that mercury(II) cyanide ionises in the following manner (a). The cation Hg2(CN)3+ probably 2Hg(CN)2+ 2HF Hg2(CN)3++ HCN + HF2(a) has a linear cyanide bridged structure [N[triple bond, length half m-dash]C–Hg–C[triple bond, length half m-dash]N–Hg–C[triple bond, length half m-dash]N]+. Further ionisation to give HgCN+ can also occur according to the equation (b). However the HgCN+ ion is not formed in appreciable amounts except in the Hg2(CN)3++ 2HF 2HgCN++ HCN + HF2(b) presence of Lewis acids, e.g., BF3 and AsF5, which precipitate the insoluble salts HgCN+BF4 and HgCN+AsF6. These salts were isolated and characterised.

Back to tab navigation

Article information


J. Chem. Soc. A, 1971, 3574-3578
Article type
Paper

The hydrogen fluoride solvent system. Part IV. Solutions of mercury(II) cyanide. Evidence for the Hg2(CN)3+ cation

R. J. Gillespie, R. Hulme and D. A. Humphreys, J. Chem. Soc. A, 1971, 3574
DOI: 10.1039/J19710003574

Search articles by author

Spotlight

Advertisements