نتایج جستجو برای: halogens

تعداد نتایج: 2719  

Journal: :Chemical communications 2013
Vittorio Pace Laura Castoldi Wolfgang Holzer

The addition of lithium carbenoids to isocyanates provides a versatile access to N-substituted 2-haloacetamides: the reaction tolerates the presence of variously functionalized substituents on the nitrogen atom, including sterically demanding ones and reactive halogens. No erosion of the enantiopurity was observed in the case of optically active isocyanates. One of the substrates prepared has b...

Journal: :Geochemistry Geophysics Geosystems 2010

1997
Larry D. Johnson

EPA Methods 26 and 26A and Proposed Methods 0050 and 005 1 are in widespread use for collection and quantitation of stationary source emissions of halogens and halogen acids from a variety of source types. Considerable research has been conducted in evaluation of these methods, but research information about the methods has not been published in one convenient summary and much of the technical ...

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