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Metal alkoxides, such as metal alkyls, can as well β-eliminate. With this in mind:
Sketch the transition state for the first step in oxidative addition of a benzyl halide and a square planar complex ML4.
Draw a catalytic cycle for phosphine-rhodium-catalyzed hydroformylation. The catalyst precursor is:
Suggest a plausible mechanism for the following reaction:
Allyl complexes are characteristically fluxional, the principle pathway being an η3–η1–η3 process. Explain this process, and sketch the 1H spectra for the low and high T limits
The living polymerization of norbornene, catalyzed by A, can be halted by the addition of benzaldehyde. The resulting polymer is terminated at one end by -CH=CHPh and at the other by -CH=CHtBu. The
What are ortho and para forms of hydrogen? Discuss the effect of temperature on ortho and para hydrogens? What is the difference between intramolecular and intermolecular hydrogen bonding? Describe wi
Explain Faraday’s laws of electrolysis. Describe Stark – Einstein Law of photochemical equivalence.
What is the difference between macrominerals and trace elements? Write the major functions of any four trace elements? How is the standard free energy for chemical reactions different form the standar
Explain the origin of Stokes, Anti-Stokes and Rayleigh lines according to quantum theory of Raman spectrum. Discuss Born oppenheimer approximation.
Draw the accepted method for each reaction and describe how each stereoisomer is formed in the reaction. For the reaction, that yields product B, predict the peaks in the IR and NMR spectra of the s
Explain regarding the presence of phosphorous in waste water and its removal.
What are the anthropogenic pollutants? What is the basic difference between primary and secondary pollutants? Give illustrations of each.
How is Standard Hydrogen Electrode (SHE) constructed? Why is usually SHE chosen as primary reference? Write its limitation when it is employed as primary reference electrode.
What is the importance of Munsell notation in characterizing a soil profile? Describe the notations shown below.
Compute the radius of the second and third orbits in He+ ion. As well compute the energy of the electron in the second and third orbits of He+ ion.
The problem is how the specific equation should be derived by using boundary condition. It consists of the final equation (which is based on Langmuir isotherm) and the boundary condition is as well
Calculate expected sea level rise for all possible combinations of temperature increase and volume affected. Base your calculations on the following information and assumptions.
What is glass transition temperature?Discuss the following factors affecting GTT i) Flexibility ii) Intermolecular forces.
Ethanol is frequently used as a fuel additive, but to function in most engines, the ethanol should be very pure and contain little water.
What are the Mark-Houwink parameters for polymer? Discuss the applicability of the Mark-Houwink model to polymer?
Based on their ground state electron configurations alone, rank these molecule in order of bond length from smallest to greatest
Supposing that any amount of strong acid or base that can be added will not dilute the stock solution by much, what guidance can you give him. All that you want to achieve is the pH 7.20.
Using the Clausius Clapeyron equation, compute the heat of vaporization of water at 100oC (it is roughly constant with T, but not quite), given the data below. Show your linear fit (e.g., from
Calculate the concentration of ethanol (in weight % and in g/cm3) when the tank is full. Additional data: The density of ethanol/water solutions is given by the empirical equation.