10.3 Identify the most likely transition metal M:a. K3[M(CN)6], in which M is a first-row transitionmetal and the complex has three unpaired electronsb. [M(H,O)6]3+, in which M is a second-row transitionmetal and LFSE-2.4 A.c. tetrahedral [MCl4]¯, which has five unpaired elec-trons and first-row transition metal Md. the third row d transition metal in the square-planarcomplex MCl,(NH3)2, which has two M-Cl stretch-ing bands in the IR

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Answered: 10.3 Identify the most likely…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter8: Bonding In Transition Metal Compounds And Coordination Complexes

Section: Chapter Questions

Problem 31P

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Is it possible for a complex of a metal in the transition series to have six unpaired electrons? Explain.
a. In the absorption spectrum of the complex ion Cr(NCS)63, there is a band corresponding to the absorption of a photon of light with an energy of 1.75 104 cm-1. Given 1 cm1 = 1.986 1023 J, what is the wavelength of this photon? b. The CrNC bond angle in Cr(NCS)63 is predicted to be 180. What is the hybridization of the N atom in the Ncs- ligand when a Lewis acid-base reaction occurs between Cr3+ and NCs- that would give a 180 CrNC bond angle? Cr(NCS)63 undergoes substitution by ethylenediamine (en) according to the equation Cr(NCS)63+2enCr(NCS)2(en)2++4NCS Does Cr(NCS)2(en)2+ exhibit geometric isomerism? Does Cr(NCS)2(en)2+ exhibit optical isomerism?
Which of the following statement(s) is( are) true? a. The coordination number of a metal ion in an octahedral complex ion is 8. b. All tetrahedral complex ions are low-spin. c. The formula for triaquatrianuninechromiwn(III) sulfate is [Cr(H2O)3(NH3)](SO4)3. d. The electron configuration of Hf2+ is [Xe]4f126s2. e. Hemoglobin contains Fe3+.
Trimethylphosphine, P(CH3)3, can act as a ligand by donating the lone pair of electrons on the phosphorus atom. If trimethylphosphine is added to a solution of nickel(Il) chloride in acetone, a blue compound that has a molecular mass of approximately 270 g and contains 21.5% Ni, 26.0% Cl, and 52.5% P(CH3)3 can be isolated. This blue compound does not have any isomeric forms. What are the geometry and molecular formula of the blue compound?
Would you expect the complex [Co(en)3]Cl3 to have any unpaired electrons? Any isomers?
1.Show how a Fischer carbene complex can be prepared starting from Mo(CO)6 . 2.How would you explain the experimental observations that the SeF6 unit in Cs2[SeF6] is C2v and looks like six of the seven vertices of a capped trigonal prism are occupied by F, but the SeCl6 unit in Cs2[SeCl6] has Oh symmetry ?
Select one a B b . A O From the stability constant ( hypothetical values ) given below , predict which is the strongest ligand ? ( a ) Cu2 + 4NH3 - Cu ( NH3 ) 4 ] ? " : { k = 4.5x10 " ) ( b ) Cu2 + -4CN- [ Cu ( CN ) 212- ( K = 2.0x1027 ) ( c ) Cu ? 2en- [ Cu ( en ) 212 " :( K = 3.0x10'5 ( d ) Cu2 + 4H20- [ Cu ( H20 ) 41 : ( K = 9.5x109 ) A Address TOSHIBA
Provide brief well focused responses to the following questions. a.Why is Δo for the [Cr(CN)6]3- anion very much larger than Δo for [CrCl6]3-? b.Qualitatively compare the expected μeff (298K) values for the octahedral complex anions [CrCl6]3- and [Cr(CN)6]3- . c.The [CoCl4]2- anion is intensely blue colored and [CoCl6]4- is a lightly colored pink. d.Why is the method of descending symmetry needed to derive an mo diagram for acetylene (ethyne), but not needed for diazene((NH)2)? e.Why is IR spectroscopy an ineffective method for vibrational studies of homo-nuclear diatomic molecules in the gas phase ?
Consider the splitting energies for the octahedral complex ions, FeBr3(CN)34-, FeBr5(CN)4-, FeBr2(CN)44-, and FeBr4(CN)24-.a) List the complex ions in order of decreasing splitting energies. (Largest splitting energy to the lowest splitting energies. Explain your answer. b) Which of these complex ions will have the shortest lamdamax? Explain your choice.
. During the early studies and development of Cisplatin, the complex [PtCl4(NH3)2] was found to be a potent inhibitor of cell division that had little effect on bacterial growth. a) Draw the possible isomeric form(s) of this compound. b) Briefly describe your prediction whether or not this complex could be converted to Cisplatin
The SCN – ligand is an ambidentate ligand. When it is S-bound, it has the name thiocyanate, and the M–S–C bond angle is bent. When it is N-bound, it has the name isothiocyanate, and the M–N–C bond angle is ~180 ̊. (a) Draw Lewis dot structures for M–NCS and M–SCN that explain the observed geometries. (b) Predict the structures of the metal-ligand bonding when SCN– reacts with Fe 2+ to form the bright red Fe(SCN)2+ ion. (c) Predict the method of bonding when Cr3+ reacts with the SCN – ligand
Which ligand below gives the LEAST stability to Pd2+ in forming a square planar complex

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