Determine the probable number of carbonyl ligands in:
a) [W(ƞ6-C6H6)(CO)n]
b) [Rh(ƞ5-C5H5)(CO)n]
c) [Ru3(CO)n]
Determine the probable number of carbonyl ligands in: a) [W(ƞ6-C6H6)(CO)n] b) [Rh(ƞ5-C5H5)(CO)n] c) [Ru3(CO)n]
Q1) For each of the following compounds, determine the formal oxidation state of the transition metal and the corresponding number of d electrons. State whether each one is likely to be stable enough to be characterized. (1) [Re(CO)5] (2) [HFe(CO)4]- (3) ((ŋ6-C5H5)2Fe) (4) ((ŋ6-C6H6)2Cr) (5) ((ŋ5-C5H5)ZrCl(OCH3) (6) (IrCl(PPh3)3) (7) (Mo(CO)3(PPh3)3) (8) (Fe(CO)4(C2H4)) (9) (W(CO)5Cl)- (10) Ni(CO)4)Q2) Use the 18-electron rule to predict the number of carbonyl ligands, n, in each of the following complexes: (1) [Cr(CO)n] (2) [Fe(CO)n(PPh3)2)] (3) [Mo(CO)n(PMe3)3] ...
5. (a) When [Mo(?5 -C5H5)(CO)3]2 is heated, it loses two CO ligands to become [Mo(?5 -C5H5)(CO)2]2, and the energies of the CO stretches change from 1960 cm?1 and 1915 cm?1 to 1859 cm?1 and 1819 cm?1 . The Mo-Mo bond length also shortens by 80 pm. Suggest plausible chemical structures for each of the compounds, and explain the change in energy of the CO stretches. (b) Explain the following trend in the energy of the CO stretch. Predict the trend...
What is d" for each of the following complexes? Number [W(CO)2 5 a) Number Pd(PPha)4 b) 10 Number c) PPh3 6 PPh3 Ph3P Rh
What is d" for each of the following complexes? Number [W(CO)2 5 a) Number Pd(PPha)4 b) 10 Number c) PPh3 6 PPh3 Ph3P Rh
5) Determine the unknown quantity: a. [ln-CsHs)W(CO)x]2 (has a W-W single bond) b. [(CO)3Ni-Co(CO)3]? C. [Ni(NO)=(SiMe3)] (all M-N-O are linear) d. [lnº-CsHs)Mn(CO)x]2 (has Mn=Mn double bond)
2. For each of the following compounds, 1) write the formal oxidation state of the transition metal and 2) the corresponding number of d electrons. 3) State whether or not each one is likely to be stable enough to be characterized. (a) [Re(CO)5] (b) [Cr(η6 -C6H6)2] (c) [Mo(CO)3(PPh3)3] (d) [Fe(η2 -C2H4)(CO)4] (e) [Zr(η5 -C5H5)Cl(OH)] (f) [Co(η5 -C5H5)2] 3. Identify the first-row transition metal (M) that follows the 18-electron rule for each of the following compounds (show how you arrived at...
2. For each of the following compounds, 1) write the formal oxidation state of the transition metal and 2) the corresponding number of d electrons. 3) State whether or not each one is likely to be stable enough to be characterized. (a) [Re(CO)5] (b) [Cr(η6 -C6H6)2] (c) [Mo(CO)3(PPh3)3] (d) [Fe(η2 -C2H4)(CO)4] (e) [Zr(η5 -C5H5)Cl(OH)] (f) [Co(η5 -C5H5)2] 3. Identify the first-row transition metal (M) that follows the 18-electron rule for each of the following compounds (show how you arrived at...
For each of the following, determine the FOS(Formal oxidation state) and dn configuration for the transition metals. Be sure to clearly show the FOS and/ or charges for all relevant ligands and species. A) Zr(C6H6)2 B) [Zn(OH2)4][ZnCl4] C) TpMoO(OMe)2 (Tp = tris(pyrazol-1-yl)borate; see Fig. 4.2 of Jones) D) .Au(porphyin)(OH2)2 E) (CpW(CO)3)2 (contains a W–W bond)
Draw the following structure and determine the number of different carbons in each molecule w/ respect to 13C NMR spectroscopy. 1. a) Penyl anhydride b) t-butyl cyclohexanecarboxylate c) N-ethyl-N-isobutylethanamide
1. Let ab and f E C[a, b], and let E(0, ))- - (co +c)w(a) da for some weight function w(x) >0. (a) Use calculus to write down a linear system for the critical point of E(co, c1). (b) Is the solution of this linear system the same as that of the normal equations arising from the use of Theorem 2 on page 395 to optimize co, ci under the norm 1/2 ? (c) Use your results to find the...
Part A:
Determine ΔH∘f for NO(g)
Part B:
Determine ΔH∘f for BF3(g)
Part C:
Determine ΔH∘f for C6H6(l)
Part D:
Determine ΔH∘f for HF(g)
0 Standard Enthalpies of Formation at 25°C Substance AH; (kJ/mol) B(s) B2O3(s) – 1273.5 BF3(g) -1136.0 C(s, graphite) C(s, diamond) 1.88 C2H2(g) 227.4 C6H6(1) 49.1 HF(9) –273.3 F(g) 79.38 472.7 0 91.3 249.2 N(g) N2(g) NO(g) O(g) O2(g) 03 (9) H(9) H2(g) 142.7 218.0 O