(i) Account for the fact that the cyanide ligand, CN-, is a strong T-acceptor; whereas the hydride ligand, HF, is a stro

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I Account For The Fact That The Cyanide Ligand Cn Is A Strong T Acceptor Whereas The Hydride Ligand Hf Is A Stro 1 (97.52 KiB) Viewed 100 times

(i) Account for the fact that the cyanide ligand, CN-, is a strong T-acceptor; whereas the hydride ligand, HF, is a strong o-donor. (ii) Consider the following reaction: IrH(Me)Cl(PMe3)3 IrCl(PMe3)3 + CH4 What type of general reaction does this equation illustrate and what do you call the reverse of reactions of this type? State the oxidation state and coordination number of the iridium centre in both the starting material and the product. (iii) Rationalise the following observations: ferrocene, (C5H5) Fe, is air stable and has an effective magnetic moment Meff of 0 UB; vanadocene (CsH5)2V has an Meff of 3.87 UB; titanocene (CsH5)2Ti does not exist; and titanocene dichloride (C3H5)2TiCl2 slowly decomposes in air. (iv) Using diagrams where appropriate, explain what is meant by the Jahn- Teller effect. Showing any appropriate working, predict which of the following species would exhibit a Jahn-Teller distortion. [Mn(CN)6]4-; [Mn(CN)6]2-; [Cu(H20)6]2+; [Ni(H2O).]2+.