Results 171 to 180 of about 73,479 (225)

Phosphorus Isocyanates

Angewandte Chemie International Edition in English, 1969
AbstractCompounds containing the PNCO grouping can be obtained e.g. from phosphorus halides and silver cyanate or esters of N‐chloroiminocarbonic acid and by thermal decomposition of alkoxycarbonylimino‐phosphoranes. The phosphorus (V) isocyanates resemble the “carbon” isocyanates in their chemical properties, whereas the phosphorus (III) isocyanates ...
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Sulfonylmethyl isocyanates, a new class of isocyanates

Recueil des Travaux Chimiques des Pays-Bas, 1966
AbstractFive alkyl‐ and aryl‐sulfonylmethyl isocyanates have been ...
J. Strating, H. O. van Oven, A. M. van Leusen   +2 more
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The reaction of isocyanates and isocyanates with bisulphite salts

Australian Journal of Chemistry, 1976
Organic isocyanates and isothiocyanates readily add bisulphite to form N-substituted aminooxomethanesulphonic acid salts (2), and the thioxo analogues respectively. As aryl isocyanates react rapidly with water, it is convenient to use triethylammonium bisulphite in an aprotic solvent for the addition.
JR Dalton, A Kirkpatrick, JA Maclaren
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Biomarkers for Isocyanate Exposure:  Synthesis of Isocyanate DNA Adducts

Chemical Research in Toxicology, 2006
Isocyanates are important intermediates in industrial manufacturing. DNA adducts and protein adducts are important tools to biomonitor people exposed to xenobiotics. In the present work, the formation of DNA adducts deriving from 4-chlorophenyl isocyanate (4CPI) and 4-methylphenyl isocyanate (4MPI) were explored. The adducts of 4CPI and/or 4MPI with 2'-
Beyerbach, A, Sabbioni, G, Farmer, PB
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Pentafluoroselenium isocyanate and pentafluorotellurium isocyanate, Fe5SeN:C:O and Fe5TeN:C:O

Inorganic Chemistry, 1984
Preparation de F 5 Se−N=C=O a partir de Xe(OSeF 5 ) 2 et HCN; F 5 Te−N=C=O peut etre prepare egalement de cette ...
Peter Huppmann, Gerhard Kloeter, Joseph S. Thrasher, Konrad Seppelt, Darryl D. DesMarteau   +4 more
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Determination of airborne isocyanates

Analytical and Bioanalytical Chemistry, 2006
Isocyanates are important in industrial hygiene and workplace monitoring. Owing to their severe acute toxicity and sensitizing properties, analytical methods with high sampling efficiency and sensitivity in the low ppb to ppt range are required. The reactivity of isocyanates necessitates initial derivatization with nucleophilic agents--usually amines ...
Henneken, H., Vogel, M., Karst, U.
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Synthesis of Isocyanates and Carbodiimides

Angewandte Chemie International Edition in English, 1966
AbstractThe reaction of 1,3‐disubstituted ureas and 1‐arylsulfonyl‐3‐alkylureas with phosgene permits the preparation of a number of isocyanates and sulfonyl isocyanates that had not previously been described, or that were difficult to prepare. 1,3‐Disubstituted thioureas and 1‐aryl‐(or alkyl)sulfonyl‐3‐alkylthioureas give carbodiimides.
H, Ulrich, A A, Sayigh
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Pulmonary Toxicity of Isocyanates

Annals of Internal Medicine, 1970
Excerpt In our plastic world polyurethanes have achieved great commercial importance. The production of polyurethane involves the combination of chemicals containing two highly reactive isocyanate ...
J M, Peters, R L, Murphy
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Toxicology of Methyl Isocyanate

1987
Since the 1984 tragedy in Bhopal, India, methyl isocyanate (MIC) has been studied extensively to provide data on its toxicity following short-term exposures to MIC vapor. The purpose of this article is to review the toxicologic studies on MIC which were conducted in laboratories under controlled and objective conditions.
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The Reactions of Isocyanates and Isocyanate Derivatives at Elevated Temperatures

Rubber Chemistry and Technology, 1959
Abstract Qualitative and quantitative studies with model compounds have shown that a variety of reactions may occur at 100–300° in molecules containing isocyanate, urea and urethane groups. All or most of these reactions are subject to catalysis so that they may be induced to proceed at lower temperatures. These reactions are quite important as
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