Solution and Solid-State Study of Heteroleptic Hg(II)-Thiolates: Crystal Structures of [Hg4I4(SCH2CH2NH2)4] and [Hg4I8(SCH2CH2NH3)2]n·nH2O
| Autor: | Sean Parkin, Mohan S. Bharara, David A. Atwood |
|---|---|
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Inorganic Chemistry. 45:2112-2118 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic051993a |
| Popis: | Combination of 2-aminoethanethiol hydrochloride and HgI2 in water in the presence of a base yielded a cyclic molecular structure, [Hg4I4(SCH2CH2NH2)4] (1). For the same reaction in the absence of the base, a similar structure with protonated amines was expected; however, polymeric [Hg4I8(SCH2CH2NH3)2]n·nH2O(2) was formed instead. The structures are quite variable despite similar reaction conditions. For instance, there is an additional Hg−N interaction in 1 due to the use of base. The environment around tetracoordinate Hg in 1 is comprised of S, N, and I atoms, with the ligand forming a five-membered chelate and the I atoms present alternate to each other. In the repeating unit of 2, three independent types of Hg atoms are observed, with HgSI3, HgS2I2, and HgI4 bonding environments that have both bridging and terminal I atoms. A simple mechanistic pathway for the formation of 1 and 2 is proposed that includes the presence of three- and four-coordinate Hg intermediates in the solution. Intermolecular hydro... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|