Q21 of 26 Page 1

A. For the complex . Write the hybridization, magnetic character and spin of the complex. ( Z = 27)

B. Why is the complex more stable than the complex ?


Option (A)


Hybridization of


Co3+ is the central atom receiving a chloride ligand being the donor.



Since (F) is a weak field ligand according to the spectrochemical series of ligands, spin pairing of electrons does not occur in the lower d orbital and thus the higher energy orbitals are occupied. One s-orbital three p-orbital and 2 d-orbitals are used.







The structure is sp3d2 hybridisation and the said compound is paramagnetic.


Now the parallel spins can also be conversely proven by the paramagnetic properties shown by the said complex. The formation of outer d complex can be explained by Crystal Field Theory (CFT). According to valence bond theory this structure exhibits octahedral geometry.


Hybridization of


Co3+ is the central atom receiving a ethylenediammine ligand being the donor.







Since ethylene diamine (en) is a strong field ligand according to the spectrochemical series of ligands, spin pairing of electrons occurs and thus the lower energy orbitals are occupied. One s-orbital three p-orbital and 2 lower energy d-orbitals are used.








The structure is sp3d2 hybridisation and the said compound is paramagnetic in nature.


Now the parallel spins can also be conversely proven by the paramagnetic properties shown by the said complex. The formation of outer d complex can be explained by Crystal Field Theory (CFT). According to valence bond theory this structure exhibits octahedral geometry.


Option (B)


As the exhibits spin pairing and the incoming ligands occupies lower energy orbitals the resultant energy of the compound is lower as compared to . Thus the complex more stable than the complex .



More from this chapter

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19

Write the name of monomers and their structure in the following:

(i) Buna – S


(ii) Terylene


(iii) Nylon – 6


 20

(i) Write the name of Monosaccharides which are obtained after the hydrolysis of lactose

(ii) What type of bonding is responsible for the stability of α – helix?


(iii) Write the difference between nucleotide and nucleoside.


 22

How do you convert:

(i) Chlorobenzene to toluene


(ii) Bu-1-ene to but-2-ene


(iii) Ethanol to ethyl iodide


OR


What happens when:


(i) n-butyl chloride is treated with alcoholic KOH


(ii) 2-chloropropane is treated with sodium in presence of dry ether


(iii) Chlorobenzene is treated with in the presence of anhydrous .


Write the chemical equations involves in the above reactions.


 23

Due to hectic and busy schedule, Mr. Singh started taking junk food in the lunch break and slowly became habitual of eating food irregularly to excel in his field. One day during meeting he felt severe chest pain and fell down. Mr. Khanna a close friend of Mr. Singh took him to doctor immediately. The doctor diagnosed that Mr. Singh was suffering from acidity and prescribed some medicines. Mr. Khanna advised him to eat homemade food and change his lifestyle by doing yoga, Meditation and some physical exercise. Mr. Singh followed his friend’s advice and after few days he started feeling better. After reading the above passage answer the following:

A. What are the values (at least two) displayed by MR. Khanna?


B. What are antacids? Give examples.


C. Would it be advisable to take antacids for a long period of time? Give reasons.