2004. 5.10
(Open book,Total:150%)
1.Name the following compound (10%)
(a)Ni(PPh3)2Cl2 (b)W(CO)5PPh3 (c)[Co(NH3)4(Py)2](BF4)2 (d)Ti(OEt)4
(e)[Fe(H2O)5(CN)]Br
2.An important synthetic strategy called transmetallation is particularly
useful for preparing new organometallic metal complexes. With which metal
halides are often used as starting material.
(a)What kinds of organometal you would choose to transform an M-X bond into
an M-C bond? Explain. (10%)
(b)Suggest a reaction to prepare ferrocene (η^5-C5H5)2Fe. (10%)
3.(a)Predict the structure and magnetism for Pt(PPh3)4 and Pt(PPh3)2Cl2,
explain. (10%)
(b)Calculate and Compare the CFSE for the compounds in (a). (10%)
4.(a)Determine the ground term for a d5 ion in Oh field and explain. (10%)
(b)Draw the d configuration for K2CuF4 and explain. (10%)
5.(a)Using symmetry to construct teh MO diagram for Fe(CN)6 3-. (10%)
(b)How are the MO fo Fe(H2O)6 3+ and FeCl6 3- different from that of
Fe(CN)6 3-? (10%)
6.(a)Determine the λmax(nm) and assign them for the electronic spectrum of
Cr3+ measured in aqueous solutions? (10%)
(b)Why is the spectrum of Mn2+ much less intensely colored than that of Cr3+
? (!0%)
(c)CrF2 and MeF2 are both six-coordinate in solid state. Do you expect the
octahedral symmetry for these two compounds? Explain. (10%)
(有給0.00145M Cr(BF4)3 之Cr3+(d3)的electronic spectrum)
7.Derive the irreducible terms for the ground state of V3+. (10%)
8.(a)In the solid state, Co(py)2Cl2 is violet and has a magnetic moment of
5.5BM, but a CH2Cl2 solution of this compound is blue and has a magnetic
of 4.42BM. In contrast, Co(py)2Br2 is blue in both solid state and in a
Ch2Cl2 solution, and has a magnetic moment of 4.6BM. Explain. (10%)
(b)Predict the color and magnetic moments for Co(Py)2I2 and Co(2-Mepy)2Cl2.
╴ ╴
py=／￣＼N 2-Mepy=╱￣＼N
\\╴// \\╴//
﹨ (10%)
9.Characterize the d configuration for the following complexes. (10%)
(a)Co(NO2)6 4- μ=1.9BM (b)Pt(NH3)2Cl2 μ=0.0BM
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