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PubMed1999

Metal Iodides in Polyiodide Networks: Synthesis and Structure of Binary Metal Iodide-Iodine Compounds Stable under Ambient Conditions.

The reaction between HgI(2)(C(6)N(4)H(12)) and HI in ethanol solution results in the binary metal iodide-iodine complexes [C(6)N(4)H(13)](2)(Hg(2)I(6))(1/2)(HgI(3)).(1)/(2)I(2), which are stable under ambient conditions. The structure consists of C(6)N(4)H(13)(+) cations, discrete trigonal HgI(3)(-) ions, and.Hg(2)I(6)(2)(-).I(2).Hg(2)I(6)(2)(-). chains in the crystallographic b direction, which are formed by I(2) molecules connecting the bridging iodines of the Hg(2)I(6)(2)(-) dimers. The intra- and intermolecular I-I distances of iodine in the chain are 2.7402(15) and 3.438(1) Å, respectively. The Raman spectrum of [C(6)N(4)H(13)](2)(Hg(2)I(6))(1/2)(HgI(3)).(1)/(2)I(2) confirms the interaction between the iodine molecules and Hg(2)I(6)(2)(-) ions. The structure of [NH(4)](HgI(3)).H(2)O, obtained during the synthesis of [C(6)N(4)H(13)](2)(Hg(2)I(6))(1/2)(HgI(3)).(1)/(2)I(2), is also reported. Crystal data for [C(6)N(4)H(13)](2)(Hg(2)I(6))(1/2)(HgI(3)).(1)/(2)I(2): a = 14.275(3) Å, b = 19.721(4) Å, c = 10.416(2) Å, orthorhombic space group Pbam; Z = 4. Crystal data for [NH(4)](HgI(3)).H(2)O: a = 8.7246(4) Å, b = 9.7860(3) Å, c = 11.1103(4) Å, orthorhombic space group Ama2; Z = 4.

Journal Article↗
PubMed1966

Studies of the congenitally goitrous sheep. The iodinated compounds of serum, and circulating thyroid-stimulating hormone.

1. A group of normal and congenitally goitrous Merino sheep were investigated to identify the metabolic defect present in the abnormal animals. 2. Protein-bound iodine concentrations of serum from goitrous animals (average 5.7mug./100ml.) were higher than normal (average 4.2mug./100ml.; P 0.001), but the hormonal iodine measured as butanol-extractable (131)I was low in the serum of goitrous (average 40.3% of protein-bound (131)I) compared with that of normal (84.2%; P 0.02) sheep. The non-hormonal iodine of the serum of goitrous sheep appeared to include iodotyrosines and iodinated protein. 3. Starch-gel-electrophoretic separations of sera from normal and goitrous sheep after (131)I injection (100-500muc) showed no qualitative differences in the radioactivity of protein components. No significant differences in thyroxine-binding in vitro by serum proteins of normal and goitrous sheep were observed. 4. The clearance rates of (131)I-labelled iodotyrosines (t((1/2)) 1.2-2.9hr.) and iodothyronines (t((1/2)) 33.5-47.4hr.) were similar in normal and goitrous sheep. 5. The concentration of circulating thyroid-stimulating hormone was significantly higher (P<0.01 in three sheep, P<0.05 in one sheep) in goitrous sheep. 6. The congenital goitre appears to be due to compensatory hypertrophy of the gland resulting from an inability to synthesize an adequate supply of thyroid hormone.

Animals↗