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- Explain giving reasons :(i) Transition metals and their compounds generally exhibit a paramagnetic behaviour.(ii) The chemistry of actinoids is not so smooth as that of lanthanoids.How would you account for the following :(i) Among lanthanoids, Ln (III) compounds are predominant. However, occasionally in solutions or in solid compounds, + 2 and + 4 ions are also obtained.(ii) The E°M2+/M for copper is positive (0.34 V).Copper is the only metal in the first series of transition elements showing this behaviour.(iii) The metallic radii of the third (5d) series of transition metals are nearly the same as those of the corresponding members of the second series.How would you account for the following: (i) Among lanthanoids, Ln(III) compounds are predominant. However, occasionally in solutions or in solid compounds, +2 and +4 ions are also obtained. (ii) The E°M2+/M for copper is positive (0.34V). Copper is the only metal in the first series of transition elements showing this behaviour. (iii) The metallic radii of the third (5d) series of transition metals are nearly the same as those of the corresponding members of the second series.
- For Co(CO)63+, give both the VBT and LFT diagrams, with electrons included. For the latter, include DOct and indicate the HOMO, LUMO, LFSE and whether the compound is paramagnetic or diamagnetic.Describe how magnetism in lanthanides series arisesWrite the name, the state of hybridization, the shape and the magnetic behaviour of the following complexes: [CoCl4]2-, [Cr(H20)2(C204)2]- , [Ni(CN)4]2-, (At. No. : Co = 27, Ni = 28, Cr = 24)
- Q6 The two complexes [NiCl4]-2 and [PtCl4]-2 are paramagnetic tetrahedral and diamagnetic square planar respectively. Explain these observations in terms of VBT, CFT & MOT?Both ions A2+ (Z=28) and B2+ (Z=46) can coordinate with the same types of ligands (X and Y) to form complex compounds of [AX2Y2] and [BX2Y2], respectively. A compound [AX2Y2] exists in only one geometric isomer, but two geometric isomers of the compound [BX2Y2] exist. Using the electron configuration of A2+ and B2+ to describe the formation of hybrid orbital type and formed compound structure. Compare their magnetic character and explain why the difference of complex formation.How would you account for the following?(i) Many of the transition elements are known to form interstitial compounds.(ii) The metallic radii of the third (5d) series of transition metals are virtually the same as those of the corresponding group members of the second (4d) series.(iii) Lanthanoids form primarily +3 ions, while the actinoids usually have higher oxidation states in their compounds, +4 or even +6 being typical.
- Rank the metals as less active < More active (Increasing order). Compound DeltaG0f (kJ/mol) NiO -212 MgO -569 CuO -130 MnO -363 What would the order be?Rank the following ions in the weak octahedral field in order of increasing Jahn-Teller effect. (22Ti, 24Cr, 25Mn) I- Ti3+ II- Cr3+ III- Mn3+Explain why polarizing power for M2+ ions increases in the first transition row metalsgoing from left to right (Sc to Zn).