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Presentation
Presentation

M.Sc Chemistry Syllabus
M.Sc Chemistry Syllabus

... groups: representation of groups by matrices, representation of symmetry operator-tranformation of basis vector, symmetry transformation of operators, the great orthogonality theorem and its consequences, construction and application of character table. Unit-2: Organometallic Chemistry I Application ...
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Microsoft Word - Open Access Repository of Indian Theses

... charge of an aluminum-containing zeolite is negative and hence must be balanced by a cation, typically an alkali or alkaline earth metal cation. As such zeolites can be represented by the empirical formula M 2/n.Al 2O 3.xSiO 2.yH 2O. Where M is the cation of valence n (typically Na, Ca, Mg etc), and ...
Convenient Methods for the Reduction of Amides, Nitriles
Convenient Methods for the Reduction of Amides, Nitriles

... system is useful in the hydrobor_ation of olefins and the corresponding ...
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Dehydrogenation of Methanol by Vanadium Oxide and Hydroxide

Review of Organic Chem II
Review of Organic Chem II

Carbonyl α-substitution and Condensation Reactions
Carbonyl α-substitution and Condensation Reactions

... Carbonyl condensation reactions take place between two carbonyl partners and involve a combination of nucleophilic addition and a-substitution steps. One partner (the nucleophilic donor) is converted into an enolate ion and undergoes an a-substitution reaction, while the other partner (the electroph ...
Grignard Reagents brochure
Grignard Reagents brochure

... teacher Philippe Barbier, is the “one-step” Grignard reaction, combining the organic halide, the magnesium metal and the electrophilic substrate together in one reaction vessel. Other metals like lithium and zinc69 can also be used for Barbier-type reactions The Kulinkovich reaction is a “hydroxycyc ...
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Title Several Reactions of Isocyanide and Related Compounds

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... the high priority groups can be on the same side or on opposite Sides of the double bond. If the high priority groups are on opposite sides then the double bond is designated as E (entgegen- across) If the high priority groups are on the same side then the double bond is designated as Z (zusammen- t ...
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... development has been successful, but increasing competition for shrinking profits has dictated an industry-wide search for a faster and more cost-effective approach. One such approach is structure-based rational drug design.* Conceptually, rational drug design is very simple. If one can define the t ...
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Title The Cyanide-Ion Cleavage of Organic Disulfides

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[Ru(Triphos)H2(CO)] Characterisation - Durham e

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New Stereoselective Approaches to Highly Substituted

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... Reactions of n i t r o s y l c h l o r i d e with pentacarbonyli r o n , Fe(C0) Reaction of n i t r o s y l c h l o r i d e with b i s [ d i c a r b o n y l (n -cyclopentadienyl)iron], [CpFe(C0) ] Reactions of n i t r o s y l c h l o r i d e with t r i c a r b o n y l n i t r o s y l c o b a l t , C ...
IOSR Journal of Applied Chemistry (IOSR-JAC)
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... identification, or protection and determination of aldehyde or ketones, purification of carbonyl and amino compounds or production of these compounds in complex or sensitive reactions have studied by various workers ...
Chapter 1 Structure and Bonding
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CHM102 - National Open University of Nigeria
CHM102 - National Open University of Nigeria

... configuration 1s2 2s2 2px1 2py1. Since only two unpaired electrons are there, one may expect that it should form only two bonds with two hydrogen atoms to form CH2. But actually it forms four bonds with four hydrogen atoms to give CH4. Pauling proposed that this could be explained by using orbital h ...
Amidations of Rosin with Isocyanates
Amidations of Rosin with Isocyanates

... Color is an important indication of modified rosin products, which somewhat reflects oxidation of rosin (Hind et aZ. 1954; Nakamura, 1970). In this study, we used color number according to JIS K5902 to monitor color changes of the reaction products of rosin with phenyl isocyanate as shown in Table 3 ...
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Ring-closing metathesis



Ring-closing metathesis, or RCM, is a widely used variation of olefin metathesis in organic chemistry for the synthesis of various unsaturated rings via the intramolecular metathesis of two terminal alkenes, which forms the cycloalkene as the E- or Z- isomers and volatile ethylene.The most commonly synthesized ring sizes are between 5-7 atoms; however, reported syntheses include 45- up to 90- membered macroheterocycles. These reactions are metal-catalyzed and proceed through a metallacyclobutane intermediate. It was first published by Dider Villemin in 1980 describing the synthesis of an Exaltolide precursor, and later become popularized by Robert H. Grubbs and Richard R. Schrock, who shared the Nobel Prize in Chemistry, along with Yves Chauvin, in 2005 for their combined work in olefin metathesis. RCM is a favorite among organic chemists due to its synthetic utility in the formation of rings, which were previously difficult to access efficiently, and broad substrate scope. Since the only major by-product is ethylene, these reactions may also be considered atom economic, an increasingly important concern in the development of green chemistry.There are several reviews published on ring-closing metathesis.
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