explain why [ Mo(PMe3)5H2] is a hydride complex but [Mo(CO)3(PR3)2(H2)] contains the dihydrogen Ligand
explain why [ Mo(PMe3)5H2] is a hydride complex but [Mo(CO)3(PR3)2(H2)] contains the dihydrogen Ligand
Homework Answers
Dihydrogen complex has more sigma donor character than hydride complex. For the first compound PMe3 have no proper pi-acceptor ability. So, the compound is hydride but due to presence of CO, which has higher pi-acceptor characteristics. The second compound get stabilized.
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explain why [ Mo(PMe3)5H2] is a hydride complex but
[Mo(CO)3(PR3)2(H2)] contains the dihydrogen Ligand
In 1984, the first organometallic compounds with H2 as an ?2 ligand were synthesized: M(CO)3(PR3)2(H2) with...
In 1984, the first organometallic compounds with H2 as an ?2 ligand were synthesized: M(CO)3(PR3)2(H2) with M = Mo or W and R = cyclohexyl or isopropyl. These complexes illustrate back-bonding with H2 as a ligand. a. Draw a structure for this molecule (just use R for the substituents on the P atoms). Because the R groups are very bulky, assume that the two PR3 ligands are in a trans configuration. Only one isomer is then possible. Show that this...
4) Why does the 1H NMR spectrum of the hydrido ligand in cis-[RhH(CO)(PMe3)2] consist of 8 resona...
4) Why does the 1H NMR spectrum of the hydrido ligand in cis-[RhH(CO)(PMe3)2] consist of 8 resonances of equal intensity? (1-bond and 2-bond couplings are both involved in this question; assume that 13C is at natural abundance of 1%, and thus not involved in the coupling, and that Pt is 100% 195Pt, spin 1/2). Your answer:
4) Why does the 1H NMR spectrum of the hydrido ligand in cis-[RhH(CO)(PMe3)2] consist of 8 resonances of equal intensity? (1-bond and 2-bond couplings...
Which complex would you expect to have longer Fe-P bonds, (η5-C5H5)Fe(Cl)[PMe3)(CO) or (η5-C5Me5)Fe(Cl)[PMe3)(CO)? Explain.
Which complex would you expect to have longer Fe-P bonds, (η5-C5H5)Fe(Cl)[PMe3)(CO) or (η5-C5Me5)Fe(Cl)[PMe3)(CO)? Explain.
What is the electron count for the organometallic complex Ir(H)2(PMe3)2(CO)1? Number electrons What is the electron...
What is the electron count for the organometallic complex Ir(H)2(PMe3)2(CO)1? Number electrons What is the electron count for the organometallic complex Ir(PEts)2(CO)Br? Number electrons
What is the electron count for the organometallic complex Ir(H)2(PMe3)2(CO)1? Number electrons
What is the electron count for the organometallic complex Ir(PEts)2(CO)Br? Number electrons
The complexes [Co(NH3)6]3+ and [Mo(CO)6] are isoelectronic and diamagnetic. The first complex is orange and the...
The complexes [Co(NH3)6]3+ and [Mo(CO)6] are isoelectronic and diamagnetic. The first complex is orange and the second complex is white. What can you deduce about the value of Δ in both of these complexes? Select one: a. Δ is larger in [Mo(CO)6] than in [Co(NH3)6]3+ b. Δ is smaller in [Mo(CO)6] than in [Co(NH3)6]3+ c. Δ is the same in the two complexes d. Δ is zero in [Mo(CO)6]
Consider the trigonal bipyramidal tungsten complex [W(CO)>(PMe3)2] 0) Draw the structure of the cis- and trans-isomers....
Consider the trigonal bipyramidal tungsten complex [W(CO)>(PMe3)2] 0) Draw the structure of the cis- and trans-isomers. (1) Discuss how you would use NMR to distinguish between the isomers (III) Discuss how you would use IR spectroscopy to distinguish between the isomers (Illustrate your answer with suitable diagrams)
3. For the complex [Co(NHs) enl21SOs identify: (a) The denticity of the ligand (en) (b) the...
3. For the complex [Co(NHs) enl21SOs identify: (a) The denticity of the ligand (en) (b) the coordination number of the cobalt (c)themolecular arrangement of the complexion tariedal (d) the oxidation state of cobalt (e) the number of unpaired electrons in the complex assuming it is a low spin complex (0 the number of ions per formula unit based on conductance studies in aqueous solutio (g) if silver ion, Ag was added to an aqueous solution of the above complex, what...
The molecule is 3. (9 points) Sketch the frontier orbitals involved in bonding the H2 to W. a. (3 points) Start by con...
The molecule is
3. (9 points) Sketch the frontier orbitals involved in bonding the H2 to W. a. (3 points) Start by considering the orbitals of the free H2 molecule. Draw the MO diagram for H2 and fill in the electrons. What is the HOMO? LUMO? Draw the shape of these orbitals. b. (4 points) Consider the metal orbitals which would have the appropriate symmetry to interact with each H2 orbital. Draw these interactions. Be sure to indicate the direction...
5. (a) When [Mo(?5 -C5H5)(CO)3]2 is heated, it loses two CO ligands to become [Mo(?5 -C5H5)(CO)2]2,...
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...
Consider the molybdenum carbonyl complex, [Mo(py)2(CO)4] (0) Draw the structures of both isomers Predict the number...
Consider the molybdenum carbonyl complex, [Mo(py)2(CO)4] (0) Draw the structures of both isomers Predict the number of CO stretching bands expected in the IR spectrum of each isomer Motivate your answer
4) Why does the 1H NMR spectrum of the hydrido ligand in cis-[RhH(CO)(PMe3)2] consist of 8 resonances of equal intensity? (1-bond and 2-bond couplings are both involved in this question; assume that 13C is at natural abundance of 1%, and thus not involved in the coupling, and that Pt is 100% 195Pt, spin 1/2). Your answer:
4) Why does the 1H NMR spectrum of the hydrido ligand in cis-[RhH(CO)(PMe3)2] consist of 8 resonances of equal intensity? (1-bond and 2-bond couplings...
What is the electron count for the organometallic complex Ir(H)2(PMe3)2(CO)1? Number electrons What is the electron count for the organometallic complex Ir(PEts)2(CO)Br? Number electrons
What is the electron count for the organometallic complex Ir(H)2(PMe3)2(CO)1? Number electrons
What is the electron count for the organometallic complex Ir(PEts)2(CO)Br? Number electrons
Consider the trigonal bipyramidal tungsten complex [W(CO)>(PMe3)2] 0) Draw the structure of the cis- and trans-isomers. (1) Discuss how you would use NMR to distinguish between the isomers (III) Discuss how you would use IR spectroscopy to distinguish between the isomers (Illustrate your answer with suitable diagrams)
3. For the complex [Co(NHs) enl21SOs identify: (a) The denticity of the ligand (en) (b) the coordination number of the cobalt (c)themolecular arrangement of the complexion tariedal (d) the oxidation state of cobalt (e) the number of unpaired electrons in the complex assuming it is a low spin complex (0 the number of ions per formula unit based on conductance studies in aqueous solutio (g) if silver ion, Ag was added to an aqueous solution of the above complex, what...
The molecule is
3. (9 points) Sketch the frontier orbitals involved in bonding the H2 to W. a. (3 points) Start by considering the orbitals of the free H2 molecule. Draw the MO diagram for H2 and fill in the electrons. What is the HOMO? LUMO? Draw the shape of these orbitals. b. (4 points) Consider the metal orbitals which would have the appropriate symmetry to interact with each H2 orbital. Draw these interactions. Be sure to indicate the direction...
Consider the molybdenum carbonyl complex, [Mo(py)2(CO)4] (0) Draw the structures of both isomers Predict the number of CO stretching bands expected in the IR spectrum of each isomer Motivate your answer
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