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A student attempting to sulfonate styrene (vinyl benzene) obtains a by product that contains neither sulfur nor oxygen atoms. Efforts to nitrate styrene yield identical results. Of the 2 diastereomers of this product identified by GC, one is crystallized and characterized. Its IR spectrum features prominent bands at 3050, 2950, 1615, and 1500 cm-1, and its 1H and 13C NMR spectra are summarized below. Identify the product, assign its NMR and IR signals to the corresponding protons and bonds, and propose a mechanism for its formation. (You do not need to determine or explain the stereo chemical configuration.)
The allylic carbons are indicated with an asterisk (*).
What happens when a melt containing 1% Ag and 99% Pb is cooled?
After making an ester by heating a carboxylic acid with alcohol in the presence of concentrated sulfuric acid, water is added to the mixture and the ester seperates out as oily lay
In the reactant SO2 + O2 , then in the product it became SO3 , how?
methods for metallurgy
Q. Show the Properties of diborane? Diborane is a colourless gas (b. p., 183K). It is rapidly decomposed by water with the formation of H 3 B0 3 and H 2 : B 2 H, + 6H 2 0 -
The number of electrons in c l - ion is: (1) 19 (2) 20 (3) 18 (4) 35 Ans: 18
Safety in Preparation of Preparation of trimethyl: 1 Use a round-bottomed flask equipped with a Claisen head (lagged with glass-wool), Quickfit thermometer (very expensive!)
In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom
the simplest forms of physical quantities
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