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Outline top down and bottom up methods for the creation of nanomaterials: in your answer give an example of each and state the differences between them?
Determine the scattering parameters for a 10dB direction coupler. The Directivity D = 30dB. Assume that it is lossless and the VSWR at each port is 1.0 under matched conditions.
Describe the operation of H-plane, E-plane and E-H plane Tee junctions. Why is a hybrid E-H phase Tee referred to as Magic Tee? Derive the scattering matrix for all of these Tees.
Derive the field expressions for a rectangular cavity resonator. Plot the field patterns for the dominant mode of propagation in such a resonator for TE and TM modes supposing dominant modes.
A rectangular waveguide has dimensions 2.5 X 5 cms. Find out the guide wavelength, phase constant β and phase velocity Vp at a wavelength of 4.5 cms for the dominant mode.
You studied the separation of 4 isomeric alcohols in the gas chromatography experiment. The given peak widths and elution times were observed in a typical run at 60ºC:
In the synthesis of hexaamminenickel(II) chloride, concentrated 15 M aqueous ammonia is added up to an aqueous solution of nickel(II) chloride. The sample is washed with small portions of ether and
Calculations and experiments like X-ray crystallography show that cytosine possesses a plane of symmetry. That is, all the atoms lie in the same plane.
A 1.0 x 10-4 M solution of an absorbing compound, example: benzene is placed in a rectangular cuvette with a path length of 1.0 cm. The absorbance of the solution is found to be 1.0.
Would the calculation still be straightforward if the reaction were conducted at 600.0 K? In brief describe.
Using materials generally found in the home, your garage, and car (example: battery acid), propose procedures for the given chemical operations. You as well have access to rocks in the back yard tha
Give the name and formula of a compound which is a strong base in liquid ammonia. Describe why the compound is a base.
Classify each of the given materials as a homogeneous mixture, a heterogeneous mixture, a pure compound, or an element. In some cases, more than one category might apply.
Convert the given quantities to SI units or US currency. Express each result by using both scientific notation and a SI prefix.
Write a balanced, net-ionic equation for the reaction, if any, that takes place when aqueous solutions of the given pairs of reagents are mixed:
What is the basic difference between a photon of yellow light and a photon of violet light?
Rationalize the given observations: a) On going from Fe(CO)5 to Fe(CO)3(PPh3)2, absorptions in the IR spectrum at 2025 and 2000 cm-1 are replaced by bands at 1944, 1886 and 1881 cm-1.
Strained alkenes like cyclopropene or norbornene bind unusually strongly to metals. Recommend a reason why.
Draw the two singly occupied molecular orbital of the cycloheptatrienyl anion, [C7H7]–. Sketch alongside each of such singly occupied MOs the metal orbital with the right symmetry for a bonding
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