Bhattacharjee, J and Panda, Tarun K
(2017)
Syntheses, Structures and Catalytic Application of
Earth Abundant Metal Complexes Stabilized by P-N
Ligands with Chalcogens & Borane Donors.
PhD thesis, Indian institute of technology Hyderabad.
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Abstract
Green chemistry, also called sustainable chemistry, is an important area of chemistry
as well as chemical engineering that focused on the designing of catalyst or the
processes that minimize the use and generation of hazardous substances. To maintain
the sustainable production of chemicals in any modern industrial processes it requires
high efficiency in any catalytic reactions, by minimizing by-products and wastes also
at the same time the metal which is used as a catalyst should be cheaper, earthabundant,
environmental friendly and non-toxic in nature. Thus introducing this earthabundant
metals as a novel catalysts, allows us to readily access a host of applications
with lower environmental impact.
Chemistry of alkaline-earth metals and early transition metals such as titanium are
less developed and need to explore more. Due to earth abundant in nature of the
alkaline-earth metals and titanium metal, make it inexpensive, easily accessible along
with its low toxicity and biocompatibility make it attractive for various type of
application in chemical synthesis. Additionally, it can able to show as a versatile
catalyst for a broad spectrum of reactions including polymerization reactions of cyclic
esters, styrene and dienes, epoxidation of alkenes, hydrofunctionalization reactions
and also atom economical reaction, cross-dehydrocoupling of silanes and amines,
hydroelementation (such as hydroamination, hydrophosphination, hydrosilylation and
hydroboration) reactions of alkenes and alkynes.
In my dissertation work, I have primarily focused on the syntheses and structural
characterization of well-defined homo- and heteroleptic alkaline-earth and early
transition (group IV) metal complexes supported by novel bulky bis- phophinamino
chalcogenides and boranes ligands in their coordination sphere as multi-dentate
chelating ligands. All newly prepared homoleptic and heteroleptic metal complexes
were utilized as active pre-catalysts in atom economical reactions such as
hydroelementation (hydroamination, hydrophosphination, hydrosilylation) reactions
etc also followed by ring opening polymerization of cyclic esters and amides.
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