Mixed halides of mercury (II)

Rastogi, R. P. ; Dubey, B. L. ; Agrawal, N. D. (1975) Mixed halides of mercury (II) Journal of Inorganic and Nuclear Chemistry, 37 (5). pp. 1167-1172. ISSN 0022-1902

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002219...

Related URL: http://dx.doi.org/10.1016/0022-1902(75)80463-5


The solid-state reactions (i) Hg2F2(s)+ Br2(g), (ii) Hg2F2(s)+ I2(g), (iii) Hg2Cl2(s)+ Br2(g), (iv) Hg2(CH3COO)2(s) + Br2(g), (v) Hg2(CH3COO)2(s) + I2(g) and (vi) Hg2I2(s)+Br2(g) have been investigated. Reactions (i)-(v) yield HgFBr, HgFI, HgClBr, Hg(CH3COO)Br and Hg(CH3COO)I respectively. In reaction (vi) HgBrI is an intermediate product which subsequently reacts with Br2(g) to produce HgBr2(s) and I2(g). The identity of the reaction product has been confirmed by X-ray powder diffraction data and the thermal stability data is consistant with thermodynamic predictions. It is found that HgFI undergoes photochemical decomposition in CCl4. The quantum yield was found to be of the order of 3 × 10−3 molecules/photon. Results suggest the following equilibria, 2HgFI ⇆lightdark Hg2F2 + I2. Solid-state kinetics for reactions (i)-(v) were studied. The energies of activation were found to be 17·2, 14·2, 7·2, 8·0 and 6·0 kcal/mole, respectively.

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