etd AT Indian Institute of Science: Recent submissions
Now showing items 1141-1160 of 9462
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Contributions to the chemistry of metal sulphide metal sulphate systems
The results show that sulphur trioxide acts as an oxidising agent in these reactions. It oxidises the sulphide to sulphate. During this process it is reduced to sulphur dioxide, and at higher temperatures (360–500?°C) even ... -
Ab initio quantum chemical studies on the molecular geometry, force field and vibrational spectra of diborane and related compounds .
A good quality force?constant set for a polyatomic molecule can be derived from ab initio calculations using the L?matrix without recourse to arbitrary scale factors or extra computational effort. The RECOVES procedure can ... -
Chain dynamics and reactivity studies on polysulfide polymers
Two new classes of polysulfide polymers, viz., PPMEPs and PPEPs, were synthesized and structurally well?characterized using spectroscopic techniques. The presence of unsaturated end groups in PPMEPs was confirmed by NMR, ... -
Differential thermal analysis and x-ray diffraction studies on manganese dioxide
Abstract not available -
Radiotracer and soliometric investigations
The thesis consists of two parts: the first part deals with a radiotracer study of the source of sulphur pick?up in manganese deposits obtained from a manganous sulphate (0.2 M) – ammonium sulphate (1.0 M) bath containing ... -
Studies on the miscibility of poly (aromatic (meth) Acrylate) s with styrene based polymers
In spite of the vast development in polymer synthesis, even today there are only a handful of polymers which are used in bulk for technological applications. Blending offers one of the convenient ways of producing materials ... -
studies on the reactivity of triphenylphospine towards diruthenium (II,III) tetracarboxylates
Abstract not available -
Role of Oxygen and BIS(N-arylsalicylaldimino)- Cobalt(II) complexes in radical polymerization.
The technique of DSC has been successfully applied to analyze the exact role of oxygen (either as an initiator or as a retarder) during the radical polymerization of acrylamide. It is found that in the melt polymerization ... -
studies on structure and flammability of aromatic polyphosphates : A correlative approach
Abstract not available -
Studies on metal hydrazinecarboxylates:Precursors to fine particle oxide materials
Fine?particle oxide materials have a variety of applications. Simple metal oxides find use as catalysts and are more reactive in solid?state reactions. Mixed oxide materials such as ferrites and cobaltites are used in the ... -
X-ray structural studies on metal complexes of vitamin B6 related compounds
Abstract not available -
synthesis, thermal rearrangement and silylation reactions of (alkoxy) (aryloxy) cyclotriphospazenes
The details of the synthesis of chloro(p?cresoxy)- and (alkoxy)(p?cresoxy)cyclotriphosphazenes, thermal rearrangement of (alkoxy)(p?cresoxy)cyclotriphosphazenes, and silylation reactions of a few alkoxy? and (alkoxy)(p?c ... -
Spirocyclic and bicyclic phosphazenes
The experimental results obtained in the present investigation clearly indicate that it is easy to replace two chlorine atoms in the reactions of, trimeric chloride, N P Cl^, with the bifunctional reagents, ethylenediamine 3 ... -
Contributions to the chemistry of sulphur flourine compounds
The present status of knowledge about the chemistry of sulphur oxyhalides and sulphur–nitrogen–fluorine compounds has been reviewed in the introductory chapter. With this background, the present investigations have been ... -
Studies on molecular complexes of macrocyclic polyethers
The investigations report the ability of several donor macrocyclic polyethers, 15?Crown?5, 18?Crown?6, benzo?15?Crown?5, dibenzo?18?Crown?6, dicyclohexyl?18?Crown?6 and dibenzo?24? Crown?8, to form molecular complexes with ...