Division of Chemical Sciences: Recent submissions
Now showing items 501-520 of 1541
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Dilute solution on properties of Methyl Methacrylate-Acrylonitrile random Copolymers
The large values of a, the M.H. exponent, suggest that these molecules are highly extended in the solvents studied. Application of S.F. and other existing theories like I.P. to calculate the unperturbed dimensions lead to ... -
Dynamics in complex systems: liquid crystals, biological water, supercooled water and enzymes
The origin of the glassy orientational dynamics, both single particle and collective, of nematogens near the isotropic-nematic transition has been addressed in several publications in recent years [5-7, 12]. In these ... -
Electron spectroscopic studies of the adsorption and reactivity of oxygen on transition metal surfaces covered with alkali and alkaline earth metals
Characteristic Cl(2p) and O(1s) peaks are seen by XPS attributable to distinct adsorbed chlorine and oxygen species on potassium and barium dosed Ag surfaces: a) There is selective stabilization of molecular dioxygen species ... -
Investgations of molecular interaction by photoelectron and electron energy loss spectrospies
Electronic structures of a variety of electron donor-acceptor complexes have been studied by employing ultraviolet (HeI) photoelectron spectroscopy. The systems studied are the complexes of BH? / AlCl?, GaCl? and SO? with ... -
Studies of surfaces by electron spectroscopy
All the organic molecules containing lone-pair orbitals adsorb molecularly (associatively) on copper at low temperatures (<100 K). b) It is possible to estimate the stabilization of the lone-pair orbitals due to chemisorption ... -
Structure - reactivity correlations of photochemical & thermal reactions in the solid state
The thesis entitled "Structure-Reactivity Correlations of Photochemical and Thermal Reactions in the Solid State" has been divided into two parts. Part I deals mainly with studies on the role of steering groups such as ... -
Studies in stereochemistry
The thesis entitled “Studies in Stereochemistry” is divided into three parts: Part I This part describes attempts to understand the cause of the unusual conformational preference of cyclohexane-1,4-dione. It is divided ... -
Investigations in stereochemistry and synthetic chemistry
Part I Cycloaddition of acrylates (methyl acrylate and methyl methacrylate) to an unsymmetrically substituted cyclopentadienone of type 1a yields the regioisomeric products 2 and 3; the disubstituted product 4 is obtained ... -
Studies in ring-chain tautomerism Ph.D. Thesis
The thesis entitled “Studies in Ring-Chain Tautomerism” consists of three chapters: Chapter 1 This chapter presents a brief review of Ring-Chain Tautomerism. The implications of this phenomenon in some biological reactions ... -
Synthesis and liquid crystalline properties of Rufigallol based discotic materials
In 1977 Chandrashekar et al. discovered the discotic liquid crystalline phase. A typical discotic molecule has an aromatic core to which are attached via ester or ether links six to eight alkyl chains, for example benzene ... -
N-Heterocyclic Carbene-Catalyzed Synthesis of C–N Atropisomers and Heteroatom Chiral Molecules
Asymmetric catalysis has received worldwide interest due to the increasing demand for optically pure compounds in pharmaceuticals, agrochemicals, natural products, and materials science. Traditionally, research in this ... -
Studies in terpenoids
Chapter 1 This chapter is devoted to the isolation and structure elucidation of some natural products which are important as drugs in the Indian system of medicine. Section 1 (i): The chemistry of Barringtonia species ... -
Transition metal complexes in the structure, streochemistry and synthesis
The thesis entitled "Transition Metal Complexes in Structure, Stereochemistry and Synthesis of Some Naturally Occurring Compounds" consists mainly of two chapters. The first chapter is divided into two parts, and Part I ... -
Synthetic investigations in steroids
Hydrolysis of Agave F Hydrolysis of Agave F gave only sugars, indicating that the polysaccharide was a glucan-fructosan in proportions of 92.7% (calculated) glucose and 7.3% (estimated) fructose. Hydrolysate indicates that ... -
Synthetic studies in terpenoids.
The thesis entitled “Synthetic Studies in Terpenoids” consists of seven chapters. The first chapter gives an account, for the first time, of the chemistry of oxygenated compounds of cadalene type. The succeeding four ... -
Studies in nonbenzenoid aromatic compounds-Thesis submitted to the IIc for the degree of Doctor of Philosophy in the faculty of science
The thesis entitled “Studies in Nonbenzenoid Aromatic Compounds” is divided into two parts (Part I and Part II). Part I Entitled “Studies on the Synthesis of 9,10-Phenanthrocyclopropenone”, it consists of three ...