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Treatment of Na2PdCI4 with 3-chloro-2-methyl-1-propene under an atmosphere of CO yields the dimer [(113- C4H7 )PdClb (A). The 1H NMR spectrum of A at 298 K shows 3 signals: a singlet at 0 2.2 and 2 doublets at 2.9 and 3.8 ppm with the relative intensities of the signals being 3:2:2 respectively. Addition of 2 moles of AsPh3 to the dimer A gives complex B (molar ratio As:Pd:CI = 1:1:1). 1H NMR spectrum of B at 195 K displays a singlet at 0 2.1 and 4 doublets at 0 2.7, 3.2, 3.6 and 4.5 with relative intensities 3:1:1:1:1 as well as aromatic protons due to AsPh3. On warming a solution of B the 1H NMR changes to show two singlets at 2.1 and 3.5 with relative intensities 3:4 in addition to resonances due to the aromatic protons.
(a) Give the structures of A and B and describe the bonding between the organic group and the palladium in A.
(b) Interpret and explain the NMR spectrum of A
(c) Interpret and explain the NMR spectrum of B at 195K
(d) Discuss what happens when B is warmed to 323K and how it accounts for the change in the NMR spectrum.
(e) How would you make the organic group in B more susceptible to nucleophilic attack.
What are the contents in the market strikes back? a. Price controls • Price ceiling • Price floor b. Quantity controls quota c. Excise tax d. Inefficiency
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Consider the following macroeconomic model: Y = C + I + G + NX C = 100 + 0.8 YD I = 300 - 1000 i NX = 195 - 0.1 Y - 100 (E.R.) E.R. = 0.75 + 5 i M = ( 0.8
Suppose the banking system has reserve of $750000, demand deposits of $2500000 and a reserve requirement of 20%. a. if the fed now purchases $125,000 worth of govt bonds from the
Filbert and Lychee have convex indifference curves. Note Filbert is indifferent between baskets (3, 2) and (4, 1)--these are x, y coordinates. Lychee is indifferent between baskets
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