Could you give an explanation of why each answer was chosen? For ich elemen are

Question

Could you give an explanation of why each answer was chosen?

For ich elemen are the d electrons more like valenee e than inner core d et Ag/ or Mo 2. For all of the following, circle the correct answer. a. Which of the two following 3d as systems should be strongly attracted to a magnetic field, b, Which of the three magnetic materials cannot be made into a permanent magnet; ie or ferrimagnetic or ntiferromagnetic? c. Which of the following magnetic materials has individual magnetic moments that do not interact with each other? ferrimagnetic or ferromagnetic or antiferromagnetic or paramagnetic? 3. Give the modern formula for 6-coordinate coordination compound, NiBro.4NH the (All NHs are in the coordination sphere.) 4. What is the original charge on the metal ion in the coordination compound 5.Circle which one of the following complexes is trans, efreite that

Explanation / Answer

1. For which atom the d-electrons are valence electrons,

Ag : valence configuration 5s1 4d10, thus it has d-electrons as valence outer electrons.

whereas in Mo, the d-electrons are inner half-filled to the 5s orbital and are not the first valence electrons due to the energy difference between orbitals filling.

2.

a. The one to get strongly to the magnetic field would be the one with unpaired electrons in it.

Thus,

the second configuration (circled one) having an unpaired electron in its configuration would be attracted to the magnetic field.

b. The one which cannot be converted to a permanent magnet would be,

Antiferromagnetic

Ferromagnetic materils are associated with permanent dipoles and are thus permanent magnetic. Ferrimagnetic are weakly magnetic that can be converted to permanent magnet upon subjecting to right conditions. On the other hand, an antiferromagnetic material is dependent upon neighbouring spin arrangement rather than outside conditions and hence they cannot be converted into permanent magnets.

c. The one with individual magnetic moment that do not interact with each other would be,

Paramagnetic

Paramagnetic material are individual separate entities which are magnetic due to individual property of having unpaired electrons. Its properties remain independent of surrounding and thus no interaction among itself is seen.

3. six-coordinate compound would be one which has nickel attached to six ligands.

[Ni(NH3)4Br2]Br

So Nickel is attached to 4 NH3 and 2 Br and thus is six-coordinated.

4. The original charge on Pd is,

+3

NH3 has 0 charge

every Br has -1 charge

So, with three Br we have -3 charge, to compensate this we have Pd3+ state.

5. A trans complex is,

First complex

It has NH3 groups oppositely oriented to each other and is thus trans.

In the second a cis-orientation as NH3 groups are all on the same side.

6. A six coordinate complex is more likely with,

large ligand

Six coordinate system has more space between ligands and possibility of extending the bonds, thus larger ligands can be better placed with less repulsion between them.

7. When the ligands are bidentate, that is it can attach to the central metal by more than one side, it can give rise to linkgae isomerism,

The above shown complexes are thus linkage isomers

In first the ligand is connected by Oxygen end and in the second the ligand is connected by nitrogen end.

8. Leavorotatory rotate plane of polarized light to the,

left

Dextro is the opposite, rotates in the right direction.

9. For a substance to be chiral, the mirror image isomer must be,

non-superimposable

A superimporable mirror image isomers are enantiomers, wherein, equal volumes of both are present. The rotation due to one isomer gets cancelled by other enentiomer making it achiral.

10. Molecule B would not have any plane of symmetry and thus it would be chiral, whereas the other moecule has plane of symmetry making it achiral in nature.

11. A regular pentagon with more sides would have greater number of degree of symmetry as compared to regular square.

12. No, a 50/50 mixture of enantiomers is a racemic mixture where the rotation due to one enantiomer is cancelled by the rotation due to the other enantiomer. thus this would not show any rotation and is achiral in nature.

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