assign4_3350_2023 answers

In general, would you expect EDTA4- to coordinate to transition metal ions more or less strongly than ethylenediamine does? Justify your answer with a reason other than the different charges on the two ligands.

Generally speaking, for a given metal and ligand, the stability of a coordination compound is greater for the metal in the +3 rather than in the +2 oxidation state (for metals that form stable +3 ions in the first place). Suggest an explanation, keeping in mind the Lewis acid–base natureof the metal–ligand bond.

Describe and compare the π-acceptor ability of the CE ligands

Inorganic Chemistry (i) Define spectrochemical series (ii) Explain the difference between weak-field and strong-field ligands

Cyanide (I) and hydride (II) ions are ligands with high trans-directing powers. Which theoretical model can better explain the trans effect of these ligands? A. I- π bond, II- Ϭ bondB. I- Ϭ bond, II- π bondC. I- polarization, II- Ϭ bondD. I- π bond, II- polarization

How does Ligand Field Theory explain the interaction between the ligand with the central metal leading to increase or decrease of   Δo ? Use the concepts of π-donor and π-acceptor ligands.

a) Give one similarity and one difference between “monodentate” and “bidentate” ligands.  b) Which one of the types of ligands named in part “b” is more closely related to the term “chelating agent”? Please explain.

Which of the following is most likely to bond to Ni2+ as a ligand?  Explain.   CH3-CH2-CH3            CH3-SiH2-CH3          CH3-O-CH3 |

Construct an MO correlation diagram for the complex ion[Ni(NH3)6]2+ and populate the orbitals with electrons. Do youexpect p bonding to be important for this complex? Whatfeatures of this diagram correspond to those predicted usingcrystal field theory? What kind of bonding would VB theorypredict for d8 complexes, and how does MO theory accountfor the bonding more accurately, even qualitatively?

Amines, NR3, are usually only weakly coordinating toward low valent metals. why is this so?Do you think that NF3would be abetter ligand for these metals? Discuss the factors involved.

Consider the [Ir2(dimen)4] 2+ complex. Notice that the dimen ligand is asymmetric. There is also a different, symmetric diisocyano ligand referred to as “TM4” (structure shown to the right) that forms the same sort of binuclear complex that dimen does. Answer the following questions with supporting justification: a. How many geometric isomers (ignore any optical ones) of [Ir2(TM4)4] 2+ are there? b. How many geometric isomers (ignore any optical ones) of [Ir2(dimen)4] 2+ are there? c. In the “twisted” deformational isomer, would you expect [Ir2(TM4)4] 2+ or[Ir2(dimen)4] 2+ to be able to rotate polarized light? Justify your answer.

Draw the SALC set for the ferrocene ligand set, describing in detail the steps used. Which isomer are you considering?

Explain in detail π backbonding using the molecular orbitals of CO and a d-transition metal. How does this influence Infrared Spectroscopy and explain how the bond order for the C-O bond changes and how the bond order for the metal-ligand bond changes. Provide pictures and explanations. (Inorganic Chemistry)

Many transition metal complexes are said to follow the “18-electron rule,” meaning they form particularly stable complexes when the metal + ligand electrons contributing to the MOs add up to a total of 18 electrons. a. Use the full MO diagram for an octahedral metal complex with pi-acidic ligands we derived in class to justify why 18-electrons might be particularly stable. b. Use the 18-electron rule to predict which 1st row transition metal would be most likely to form an octahedral M(CO)6 (Note: there is no charge; the metal retains all its electrons.) c. Qualitatively, how would you expect the CO bond to change when it forms this complex? Would it be stronger, weaker, or the same compared to free CO? (Hint: think about what a ? −???? means and what the orbital does from the perspective of the M–CO interaction as well as the C– O interaction).

The (2-aminoethyl)phosphine ligand, acts as a bidentate ligand with metalsof Transition.i) How many possible isomers of [dichlorobis{(2-aminoethyl)phosphine}nickel(II)] inoctahedral coordination exist? Draw them and identify the pairs of enantiomers.ii) Classify the configuration of the chiral isomers as D or L

Sketch structure of Mo(DMe) Cl2 (NMe,)2 , thhen apply ean to this complex showing ligand analysis and oxidation state analysis

Strong-field ligands (such as CN-) stabilise the M2* oxidation state. Reflect on the reason.

Sketch the orientation of the orbitals relative to the ligandsin an octahedral complex to explain the splitting and the relativeenergies of the dxyand dx2-y2 the orbitals.

Draw a Lewis structure for the cyclopentadienyl ligand (C5H5)- and explain why it is more likely to bind it’s aromatic protons to a transition metal center compared to the similar benzene molecule (C6H6).

Provide a name for the following complex ion:[AuF4]^-

Which ligand below gives the LEAST stability to Pd2+ in forming a square planar complex

Define the ambidentate ligand and give two examples.

According to the theory of molecular orbitals, how are ligands classified and what effect do they have on the value of the octahedral field?

Are bipyridines (bipy) and analogous amines, phenanthroline (phen) and terpyridine (terpy) chelate ligands?Is there the possibility of the formation of complexes of these ligands with metals in a low oxidation state? Why?