[en] Interactions between iodozoflurosulfate and fluorine-containing olefins of norbornane series have been studied. Occurrence of frame rearrangements and participation of external nucleophils in the reactions suggest a high electrophilicity of iodozofluorosulfate. In the course of the reactions iodineamides and iodine perchlorates are formed and thus iodozoflurosulfate can be considered as an effective reagent for their synthesis. 21 refs.; 2 tabs

[en] The contrast production for the chemical elements with the atomic numbers Z=1-83 were determined by computer-tomography. With the formula relation of the Δ-number and the atomic number can one compute the contrast production of any chosen chemical compound. Iodine-free and inorganic iodine-containing contrast media are examined for their contrast production and compared with presently used organic iodine-containing contrast media. The contrast enhancement of organic contrast media in tissue are discussed. (orig.)

[en] Results of studying nucleophilic replacement reactions in the systems of C₆H₅Br(42.5 mol %) -C₆H₄DrX(42.5 mol %)-C₄H₉NH₂ (15 mol %)-At^-(I^-) where X=CH₃, F, Cl and NO₂ in meta- and para-positions are presented. The reactions proceeded during an hour at 210+-0.1 deg C. To determine yields of reaction products containing radiohalogens a gas-chromatographic technique of analysis with the activity detection by a scintillation counter was used. It is shown that the relative yields of astatobenzenes, beside p-nitrobenzene correlates with the Hammett σ constants lg([XC₆H₄At(I)]/(C₆H₅At(I)])=rho x Σ. For astatobenznes the reaction parameter rho=0.59; for iodobenzenes rho=0.0 rho values permit to conclude that there is a two-stage process of nucleophilic replacement of bromine by astatine and iodine in bromobenzenes in the presence of amine

[en] Iodine-catalyzed reactions of a variety of cyclic 1,3-dicarbonyls with 3-metyl-2-butenal and 1-cyclohexene-1-carboxaldehyde are carried out in refluxing methylene chloride to yield the 2H-pyrans. This methodology has been applied to the synthesis of biologically interesting and naturally occurring pyranoquinolinone alkaloids such as flindersine, N-methyl-flindersine, haplamine, and N-methylhaplamine in moderate yields. 2H-Pyrans are important core units in a number of natural products and also in photochromic materials. The molecules bearing 2H-pyrans have a variety of interesting biological activities and potential medical applications. 2H-Pyrans were prepared earlier using piperidine or BF₃-Et₂O as a catalyst. We have been developed the methodologies for the synthesis of 2H-pyrans through indium(III) chloride- or EDDA-catalyzed formal [3+3] cycloaddition as a Lewis acid or a Brφnsted acid and base catalyst. Later, novel approaches for the synthesis of 2H-pyrans were also developed by other groups using TiCl₄, and In(OTf)₃ Lewis acids as a catalyst and phosphoric acid as a Brφnsted acid catalyst. Although several synthetic approaches for constructing 2H-pyrans derivatives have been reported by us and other groups, more simple and cost-effective approaches are still demand because of their importance

[en] The role of halogen atom as a reaction centre in reactions of organic and inorganic halogen derivatives was considered. It is shown that many of the reactions actually proceed by substitution mechanism in halogen atom rather than in carbon or metal atoms as was assumed earlier. Reasons for increase in reactivity from fluorine- to iodine-derivatives, as well as in the opposite direction, are formulated

[en] In the framework of development of a unified system of electron and steric effects of ligand conical angles of 176 compounds R₂X and RHal, where X=O, S, Se, Te; Hal=F, Cl, Br, I; R=H, Hal (only in the case of R₂X), Alk or Ar, were calculated. A levelling effect of large X and Hal was pointed out: in the beginning of steric series the conical angles are determined by dimensions of X and Hal and not by R ones. Similar levelled values of conical angles for previously considered ligands on the basis of N, P, As, Sb, Bi, C, Si, Ge, Sn were also calculated

[en] The ¹³ C NMR chemical shifts of the α, β, γ and δ carbons of 17 sets of aliphatic halides (F, Cl, Br and I), including mono, bi and tricyclic compounds, can be reproduced by a linear equation composed with two constants and two variables: δ_RX = A^* δ_R-X2, where A and B are constants derived from multilinear regression of ¹³ C chemical shifts observed; δ_R-X, the chemical shifts of aliphatic halide (R-X); and δ_R-X1, δ_R-X2 the chemical shifts of other halides. It was observed a better correlation for aliphatic bromides (R-X) by using data of aliphatic fluorides (R-X 1) and aliphatic iodides (R-X 2), resulting R² of 0.9989 and average absolute deviation (AVG) of 0.39 ppm. For the chlorides (R-X), the better correlation was observed by using data of bromides (R-X 1) was observed better correlation with data of bromides (R-X 1) and iodides (R-X 2), R² of 0.997 and AVG of 1.10 ppm. For the iodides (R-X) was observed better correlation with data of fluorides (R-X 1) and bromides (R-X 2), R² of 0.9972 and AVG of 0.60 ppm. (author)

[en] This document summarizes safety management programs used within the scope of the ''Project Hanford Management Contract''. The document has been developed to meet the format and content requirements of DOE-STD-3009-94, ''Preparation Guide for US. Department of Energy Nonreactor Nuclear Facility Documented Safety Analyses''. This document provides summary descriptions of Fluor Hanford safety management programs, which Fluor Hanford nuclear facilities may reference and incorporate into their safety basis when producing facility- or activity-specific documented safety analyses (DSA). Facility- or activity-specific DSAs will identify any variances to the safety management programs described in this document and any specific attributes of these safety management programs that are important for controlling potentially hazardous conditions. In addition, facility- or activity-specific DSAs may identify unique additions to the safety management programs that are needed to control potentially hazardous conditions

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