Synthesis, Structure, and Bonding in Polyiodide and Metal Iodide−Iodine Systems

An insight into the disorder properties of the α-cyclodextrin polyiodide inclusion complex with Sr2+ ion: dielectric, DSC and FT-Raman spectroscopy studies

“…These findings explicitly indicate that the aforementioned inclusion complexes are excellent models for the elucidation of principal forces, dynamic properties and charge transport mechanisms in the water clusters of biological systems (10)(11)(12)(13)(14), in the building blocks of many polyiodide materials (15) and in the cyclodextrin complex formation processes (16,17). Despite the fact that the individual nature of each counterion appears 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 The temperature variation was controlled with a Ventacon Winchester instrument equipped with a CALCOMMS 3300 autotune controller.…”

“…Finally, the total absence of any hump (indicative of amorphous material) in the experimental XRPD pattern proves the purity of the synthesized inclusion complex (single phase compound). Figure 1a) (15,18,(26)(27)(28)(29)(30)(31)(32). As the temperature is lowered to -130 o C (Figures 5a, b), the band at 156 cm -1 is slightly shifted to the higher frequency of 158 cm -1 and presents an intensity enhancement in relation to the shoulder at 169 cm -1 which becomes so weak that it is barely identifiable.…”

Hypervalent Adducts of Chalcogen-Containing peri-Substituted Naphthalenes; Reactions of Sulfur, Selenium, and Tellurium with Dihalogens

“…This is in agreement with the generally accepted mechanism to describe the formation of adducts from the reaction of diorganochalcogen donors with the dihalogens; 14,38,39 15,22 In general the reactions between D1-D8 and the dihalogens conform to the charge-transfer rule and form "see-saw" adducts when the halogen (X) species is more electronegative than the chalcogen-donor (E) [R 2 E δ+ -X δ-] and form C.-T. "spoke" adducts if the converse is true. 20,21,22 Reactions between Te-donors [χ(Te) 2.08] 43 and any dihalogen [χ(F) 3.94-χ(I) 2.36] 43 explicitly afford "see-saw" or "Tshaped" adducts with no C.-T. adducts known for any tellurium compound. 14,15,22,43 Tellurium donor compounds D4-D7 react conventionally to form strong donor-strong acceptor systems with the dihalogens, the X-X bond is cleaved and the Te atom is oxidised.…”

“…13,16,17 Nonetheless, hypervalency is a topic of continued interest to chemists with numerous compounds containing linear arrangements of three main group elements having been well documented recently in the literature. 14,15,18,19,20,21,22 The nature of the bonding in these linear species can be described by the Rundle-Pimentel 3c-4e model and a charge-transfer model and has recently been thoroughly reviewed. 23 Organic molecules containing the Group 16 donor atoms sulfur, selenium and tellurium react with dihalogens (Br 2 , I 2 ) and inter-halogens (IBr, ICl) to form a variety of addition complexes with wide structural diversity.…”

Measurement of Nitric Oxide Levels in the Red Cell

“…(presumably leading to a gradual increase in the ratio of iodine over iodide as well as formation of metal iodides in the mixture) may be rather complex and include transient formation and decay of several different polyiodides (38). Rogers et al (30) give no indication as to the time window applied to produce their results.…”