The anticancer drug cisplatin, cis-[Pt(NH3)2Cl2] (see Figs. 8.12b and 8.33),can be prepared from K2PtCl6 via reduction with N2H4 (hydrazine), givingK2PtCl4, followed by replacement of two chloride ion ligands with ammonia. Give systematic names to the three platinum complexes referred to inthis statement.

The anticancer drug cisplatin, cis-[Pt(NH3)2Cl2] (see Figs. 8.12b and 8.33),can be prepared from K2PtCl6 via reduction with N2H4 (hydrazine), givingK2PtCl4, followed by replacement of two chloride ion ligands with ammonia. Give systematic names to the three platinum complexes referred to inthis statement.

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 73AP

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(a) In early studies it was observed that when the complex [Co(NH3)4Br2]Br was placed in water, the electrical conductivityof a 0.05 M solution changed from an initial value of191 ohm-1 to a final value of 374 ohm-1 over a period of anhour or so. Suggest an explanation for the observed results.(b) Write a balanced chemical equation to describe the reaction.(c) A 500-mL solution is made up by dissolving 3.87 g ofthe complex. As soon as the solution is formed, and beforeany change in conductivity has occurred, a 25.00-mLportion of the solution is titrated with 0.0100 M AgNO3solution. What volume of AgNO3 solution do you expectto be required to precipitate the free Br-(aq)? (d) Based onthe response you gave to part (b), what volume of AgNO3 solution would be required to titrate a fresh 25.00-mL sampleof [Co(NH3)4Br2]Br after all conductivity changes haveoccurred?
(i) Draw the geometrical isomers of complex [Pt(NH3)2Cl2].(ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if Δ0 < P.(iii) Write the hybridization and magnetic behaviour of the complex [Ni(CO)4]. (At. no. of Ni = 28)
(a) Give systematic names for the following formulas: - [Co(N3)(NH3)s]SO4 - KĄ[Fe(CN);ONO] - [Pt(en)2][PtCl4] (b) Provide the formula with the given systematic names: - Sodium pentachloronitridoosmate(VI) - Pentaammineisothiocyanatocobalt(III) chloride - Potassium diaquabis(oxalato)manganate(III) (c)Write the formula of possible isomer structure for [Co(NH3)sBr]SO4 complex. Define the type of isomerism and explain how you can differ them?
(a) Explain the following observations: (1) (ii) (iii) For a given metal ion, the thermodynamic stability of polydentate ligand is greater than that of a complex containing a corresponding number of comparable monodentate ligands. The K, value for [Cu(NH3)4]2+ and [Cu(en)₂]²* is 1.1 x 10¹3 and 1.0 x 102⁰, respectively. The compound Pt(CO), is known but cluster (CO)3Pt(μ-Cl)₂Pt(CO) has never been prepared.
(a) Square planar complexes (of MXJLJ type) with coordination number of 4 exhibit geometrical isomerism, whereas tetrahedral complexes with similar composition do not. Why? (b) Describe the type of hybridization, shape and magnetic property of [CO(NH3)4Cl2]Cl. [Given : At. no. of Co = 27]
Werner prepared two compounds by heating a solution of PtCl₂ with triethyl phosphine, P(C₂H₅)₃, which is an excellent ligand for Pt. The two compounds gave the same analysis: Pt,38.8%; Cl, 14.1%; C, 28.7%; P, 12.4%; and H, 6.02%. Writeformulas, structures, and systematic names for the two isomers
Consider the ligand exchange reaction [(Co(H2O)6]2+ + 3en = [(Co(en)3]2+ + 6H2O (where en = ethylenediamine; Le. 1,2-diaminoethane, C¿HA(NH;)) - Describe how Crystal Field Theory treats the bonding in [(Co(en)3]2+. - Calculate the number of valence d electrons in [(Co(en)3]2+, and comment on whether different electron configurations are possible within the Crystal Field Theory treatment.
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Compare the methyl isocyanide (C=NCH3) ligand to C=O (carbonyl) with regards to its o donor ability and n-backbonding ability. Discuss. Clearly explain the origin of any differences in metal- ligand bonding between the two ligands.
Draw the structures of the following structures. Point clearly the pair of enantiomers. [Pt(NH3)3Cl3] [Co(NH3)2(H2O)2Cl2] [Co(NH3)2(H2O)2BrCl]+ [Cr(H2O)3BrClI] [Pt(en)2Cl2]2+ [Cr(o-phen) (NH3)2Cl2]+
Account for the fact that the colours, and their intensities, exhibited by transition metal complexes can vary enormously. Your answer should include an explanation of the fact that while Cul is colourless, Na₂ [Cr₂O7] is intense orange. www
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