M.Sc. (Semester IV) (CBCS) Examination Mar/Apr-2018
Inorganic Chemistry
CO-ORDINATION CHEMISTRY II
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt in all five questions. Section-I is compulsory. Attempt any two questions from Section II and any two from Section III. Answer to all question (Section II and III) should be written in the one answer book. All question carry equal marks. Figures to the right indicate full marks. Use of log table and calculator is allowed.
Section I
Q.1
Answer the following.
14
What is steric effect?
Write names of symmetry elements which must not be possessed by optically active compound?
What is plane polarized light?
Arrange the following isoelectronic species with increase in lability. SF6,AIF63−,SiF62−,PF6−
Out of which one is optically active. cis-[Co(NH3)4Cl2] trans- Co NH3 4Cl2
Write inner sphere mechanism?
Define Quantum yield?
Define acid hydrolysis?
Polarization theory of trans effect is based on which concept.
What is the role of Nicol prism in the polarimetry?
Write two metallocenes which give photochemical reaction?
What is full form of CTTS?
Predict the rate of dissociative mechanism when increase the negative charge of entering group?
What is cis effect?
Section II
Q.2
Explain the polarization theory of trans effect.
07
Explain in brief photochemistry of metallocene.
07
Q.3
Discuss the mechanism of outer sphere electron transfer. Illustrate your answer with examples.
07
Discuss the relationship between optically rotator dispersion and circular dichroism curves.
07
Q.4
Explain acid hydrolysis of Co complexes by considering effect of chelation and steric factors.
07
Discuss the types of nucleophilic substitution reactions in octahedral complexes.
07
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SLR-UF-257
Section III
Q.5
What is the role of bridging ligand in inner sphere electron transfer mechanism?
05
Define the photochemistry. Explain the concept of quantum yield in photochemistry.
05
What do you understand by activated complex, activated energy and transition state? Explain with graphical representation.
04
Q.6
Write the evidences to support SN2 reaction mechanism of square planner complex.
05
What is anation reaction? Explain the mechanism with an example.
05
Explain the mechanism involved in isomerisation reaction in octahedral complexes.
04
Q.7
Write a note on any Three of the following.
14
Racemisation reactions in octahedral complexes
Substitution reactions
Base hydrolysis
Reaction in non aqueous solvents