BCHET-147 EM 2026 SOLVED ASSIGNMENT

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Tutor Marked Assignment

BCHET-147: ORGANOMETALLICS, BIOINORGANIC CHEMISTRY, POLYNUCLEAR HYDROCARBONS AND UV, IR SPECTROSCOPY

Course Code: BCHET-147 Assignment Code: BCHET-147/TMA/2026

Maximum Marks: 100 Note: Attempt all questions. The marks for each question are indicated against it.

PART A: ORGANOMETALLICS, BIOINORGANIC CHEMISTRY

1.What is the chromyl chloride test? Give suitable equations.

2.Give the structure of dimethyl beryllium.

3.Explain the concept of hapticity with reference to allyl complexes, such as [Pd(η3-C3H5)Cl]. How does η3-coordination differ from η¹-coordination in terms of bonding and structure?

4.Explain the structure of Fe2(CO)9 based on valence bond approach.

5.How can formation of nitrosyl complexes be formed from carbonyl complexes with the help of nitric oxide? Give three suitable equations to show this.

6.The C – O stretching frequencies in the IR spectra of certain metal carbonyl species are as follows:

7.What information is obtained from the IR spectrum of Fe2(Cp)2(CO)4 given below ?

8.Which metal ion is essential for the process of blood coagulation? Explain the mechanism by which it facilitates clot formation? Give the different ways by which cadmium affects the human body.

9.With the help of a suitable diagram explain the Na+-K+ pump. Show how the sodium potassium pump moves toward an equilibrium state with the relative concentrations.

10.With the help of a suitable diagram, explain the mechanism of oxygen binding in hemoglobin and discuss the structural changes that occur upon formation of oxyhemoglobin.

PART B: POLYNUCLEAR HYDROCARBONS AND UV, IR SPECTROSCOPY

11.How will you prepare 5-hexen-2-one from ethyl 3-oxobutanoate. Give the reactions involved and the reagents used in the reaction

12.(a) Give IUPAC names of the following compounds.

(b) Is napthalene an aromatic compound? Explain.

13.Give the reaction involved and the reagents used for the commercial preparation of pyrrole.

14.Give the resonance structures for the intermediate in the reaction where electrophile E+ attacks on 2-position of pyridine.

15.What are the differences between Bathochromic shift and Hypsochromic shift?

16.Explain Woodward rules for predicting p-p* absorption in dienes.

17.What sort of shift may be observed in bromobenzene, (C₆H₅Br)?

18.Explain the Feiser and Scott rules for predicting p – p* absorption in a, b-unsaturated ketones (enones) and aldehydes.

19.With the help of suitable diagrams explain how the IR spectrum is depicted in the absorption mode and the transmittance mode.

20.The IR spectrum of a sample of cyclohexanol is recorded. Which major absorption bands you would be looking for in the spectrum?