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Full Screen- TITLE
- CERTIFICATE
- DECLARATION
- ACKNOWLEDGEMENT
- ABBREVIATIONS
- CONTENTS
- 1 Introduction and Objectives
- 2 Polymer-Supported Reagents: An Overview
- 2.1. Organic synthesis using polymer supports
- 2.2. The polymer support
- 2.3. Solvation behaviour of functionalised polymers
- 2.4. Nature of the polymer backbone
- 2.5. Functionalisation of polymer supports
- 2.6. Characterisation of functional polymers
- 2.7. Advantages and limitanions of polymer-supported reactions
- 2.8. Characteristic effects of the polymer matrix on solid phase reactions
- 2.8.1 Microenviournmental effects
- 2.8.2 Effect of degree of crosslinking
- 2.8.3 Effect of spacer handles
- 2.9. Polymer-supported oxidising reagents
- 2.10. Polymer-supported halogen containing reagents
- 2.11. Miscellaneous polymeric oxidising reagents
- 3 Experimental
- 3.1. General
- 3.2. Preparation of cross linked polyvinyl pyrrolidone) s (PVP) -General procedure
- 3.3. Preparation of cross linked poly (vinyl pyrrolidone) --iodine complexes
- 3.4. Determination of the capacity of the cross linked poly (vinyl pyrrolidone) iodine complex
- 3.5. Oxidation and halogenation reactions using cross linked PVP iodine complexes
- 3.6. Monitoring the course of oxidation reactions
- 3.7. Investigation of the effect of cross linking on the extent of oxidation
- 3.8. Effect of solvent
- 3.9. Effect of molar concentration of the reagent
- 3.10. Effect of temperature on oxidation reactions
- 3.11. Effect of time
- 3.12. Swelling studies of PVP-iodine complexes
- 3.13. Recycling and reuse
- 3.14. Preparation of polystyrene sulphonic acid resins
- 3.15. Estimation of polystyrene sulphonic acid
- 3.16. Polystyrene sulphonyl chloride
- 3.17 Estimation of chlorine in polystyrene sulphonyl chloride
- 3.18. Preparation of polystyrene sulphonamide
- 3.19 N-chloro-N-sodio polystyrene sulphonamide resin
- 3.20. N-Bromo-N-sodio polystyrene sulphonamide resin
- 3.21. Estimation of the capacity of N-halo resins
- 3.22. Halogenation reactions- general procedure
- 3.23. Preparation of polystyrene with different cross link densities
- 3.24. Functionalisation of polystyrene with different cross link densities
- 3.25. Bromination of aqueous solution of phenol at different time intervals
- 3.26. Effect of molar excess of the reagent
- 3.27. Effect of temperature on halogenation of phenol
- 3.28. Recyclability of the spent reagent
- 3.29. Thermogravimetry
- 3.30. 13C-CP MAS NMR
- 4 Results and Discussion
- SECTION A - POLY (VINYL PYRROLIDONE) SUPPORTED REAGENTS
- 4.1. Poly (vinyl pvrrolidone) -general concept
- 42. Poly (vinyl pyrrolidone) --iodine complexes
- 4.3. Cross linked poly (vinyl pyrrolidone) - preparation and characterisation.
- 4.3.1 Preparation and characterisation of DVB-crosslinked PW
- 4.3.2 Preparation and characterisation of NNMBA-crosslinked PVP
- 4.3.3 TEGDVE-crosslinked PVP-preparation and characterisation
- 4.3.4 1, 6-HDODA-crosslinked PVPLpreparation and characterisation
- 4.3.5 TTEGDA crosslinked PVP-preparation and characterisation
- 4.4. Preparation of cross linked poly (vinyl pyrrolidone) -iodine complexes
- 4.5. Characterisation of cross linked PGP-iodine complexes
- 4.5.I DVEcrosslinked PVP-I complexes
- 4.5.2 NNMBA-crosslinked PVP-I complex
- 4.5.3 TTGDVE-crosslinked PVP-l complex
- 4.5.4 1, 6 HDODA-crosslinked PVP-I complex
- 4.5.5 TTEGDA-crosslinked PVP-I complex
- 4.6. Reactions using cross linked poly (vinyl pyrrolidone) -iodine complexes.
- 4.6.1 Oxidation of alcohols
- 4.6.2 Halogenation of olefins
- 4.6.3 Synthetic reactions using PVP-iodine complexes
- 4.6.4 Selectivity of PW-iodine complexes
- 4.7 Recyclability of the reagent
- 4.8. Structure-reactivity correlation of PVP-iodine complexes
- 4.8.1 Nature of the polymer support
- 4.8.2 Effect of crosslink density
- 4.8.3 Effect of solvent
- 4.8.4 Effect of concentration of the reagent
- 4.8.5 Effect of temperature on the oxidation reactions
- 4.8.6 Hfect of time on mctiviiy of WPJ complexes
- SECTION B - POLYSTYRENE-SUPPORTED REAGENTS
- 4.9. Polystyrene-supported N-halosulphonamides
- 4.9.1 N-haleN-sodio polysityrene sulphonamide resins-preparation andcharacterisation
- 4.9.2 Synthetic reactions usin!g N-halo-N-sodio polystyrene sulphonamides
- 4.9.3 E i M of various parameten on the extent of halogenation reaction
- 4.9.4 Recycling and reuse of the reagent
- Summary and Outlook
- References