NIST–JANAF Thermochemical Tables for the Iodine Oxides

Abstract

The thermodynamic and spectroscopic properties of the iodine oxide species have been reviewed. Recommended Nl.sT-JANAF Thermochemical Tables are given for six gaseous iodine oxides: 10, 010, 100, 101, lIO, and 1°3 , Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 400 references) are provided for all neutral iodine oxides which have been reported in the literature. There is a lack of experimental thermodynamic and spectroscopic information for all iodine oxide species, except IO(g) and OIO(g). The recommended thermochemical tables are based on estimates for the structure, vibrational frequencies, and enthalpy of formation based in part on the spectroscopic and thermodynamic data for the other halogen oxides [1. Phys. Chern. Ref. Data 25, 551 (1996); •25, 1061 (1996)]. Although there is a definite lack of information in comparison with the other halides, this information is provided for the iodine oxides for the following reasons: (1) to complete the study of the halogen oxide family and (2) to stress the need for additional experimental measurements. Of all the species mentioned in the literature, many have not been isolated or characterized. In fact, some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean.

Synthesis and Characterization of Bromoaluminate Ionic Liquids

“…D f H 0 s (AlX 3 ) [30] [kJ mol À1 ] À1510 À706 À511 À303 D 0 298 (AlX) [17] [kJ mol À1 ] ([N 2225 ][AlBr 4 ]) and 2.7823-3.0250 ([Bu-2-MePy]Br);t hey are shorter than the sum of the van der Waals radii (3.06 ), [31] but significantly longert han the sum of the covalent radii (1.51 ) [32] indicating only little cation-anion interactions. The bond lengths and angles of the cations and anions of both structures are as expected and in good agreement with similar structures.…”

A Nonradioactive Approach to Investigate the Metabolism of Therapeutic Peptides by Tagging with 127I and Using Inductively-Coupled Plasma Mass Spectrometry Analysis

“…This capillary UPLC-ICP-MS method gave a LOD that is ;fourfold higher than the LOD of 122 fg 127 I reported using reverse-phase capillary LC coupled to a single-stage quadrupole ICP-MS via an argon plasma (Pereira Navaza et al, 2009). This LOD cannot be attributed to dilution of the ion current by oxide formation as the formation of 127 I 16 O is thermodynamically unfavorable because it is an endothermic reaction (Chase, 1996). Instead, the different reported LOD is probably due to different instrumental setup and operation.…”

Electronic structure and spectra of a new molecular species: SI. A theoretical contribution

“…In the case of IO, the experimental values of the ground state (X 1 energy range from 42.07 to 59.51 kcal mol À1[46], whereas the best theoretical estimates, considered as lower limit values, are 49.24 kcal mol À1 for the state X 2 P, and 45.65 kcal mol À1 for X P 3/2[13]. In the case of SCl, Woon and Dunning have estimated a D e value of 66.4 kcal mol À1[47] for the X 2 P state, a result indicating that the species SCl is about 20% more strongly bound than SI.…”