(a) Give the formal oxidation number and the d-electron count of the transitionelement and the total number of valence electrons in metal complexes A - E.(C5Me5 pentamethylcyclopentadienyl, 1,5-COD = 1,5-cyclooctadiene)A [Ti(5-C5Me5)2(Me)][SbF6]B Co(n5-Cp)zC TaMe5D [Cr(n-C6H6)2]*E ZnPh2

In metal complexes, the central transition metal is often surrounded by ligands, which are neutral…

Answered: (a) Give the formal oxidation number…

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 33P

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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?
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?
Four different octahedral chromium coordination compounds exist that all have the same oxidation state for chromium and have H2O and Cl as the ligands and counterions. When 1 mole of each of the four compounds is dissolved in water, how many moles of silver chloride will precipitate upon addition of excess AgNO3?
The square-planar complex Pt(en)Cl2 has chloride ligands in a cis configuration. No trans isomer is known. Based on the bond lengths and bond angles of carbon and nitrogen in the ethylenediamine ligand, explain why the trans compound is not possible.
Classify each ligand as monodentate, bidentate, and so on. (a) (CH3)3P (b) H2N(CH2)2NH(CH2)2NH2 (c) H2O
Which of the following ligands is expected to be monodentate, and which might be polydentate? (a) CH3NH2 (b) CH3CN (c) N3 (d) en (e) Br (f) phen

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(a) Give the formal oxidation number and the d-electron count of the transition element and the total number of valence electrons in metal complexes A - E. (C5Me5 pentamethylcyclopentadienyl, 1,5-COD = 1,5-cyclooctadiene) A [Ti(5-C5Me5)2(Me)][SbF6] B Co(n5-Cp)z C TaMe5 D [Cr(n-C6H6)2]* E ZnPh2