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2 edition of Halogenation of sterically hindered organotin compounds found in the catalog.

Halogenation of sterically hindered organotin compounds

Mustafa Al-Rawi

Halogenation of sterically hindered organotin compounds

by Mustafa Al-Rawi

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  • 39 Currently reading

Published .
Written in English


Edition Notes

D.Phil. 2000. BLDSC DXN032568.

Statementby Mustafa Al-Rawi.
SeriesSussex theses ; S 4910
ID Numbers
Open LibraryOL18573065M

Sterically hindered phenols have been used as antioxidant agents for more than half a century [6,7]. One of the best known representatives of this class of antioxidant agents is 2,6-di- tert -butylmethylphenol (butylated hydroxytoluene, BHT), primarily used in food, cosmetics and pharmaceuticals [ 5, 8, 9, 10 ], and its derivatives are. Marcel Gielen's research works with 7, citations and 1, reads, including: farkh JOMC

Some sterically hindered compounds. C. Eaborn Abstract. The first page of this article is displayed as the abstract. About. Cited by. Related. Back to tab navigation. Download options Please wait Article information For reproduction of material from all other RSC journals and books. ISBN: OCLC Number: Description: pages: illustrations ; 24 cm. Contents: Structure and reactivity of monomeric, molecular tin(II) compounds / M. Veith, O. Recktenwald --Chirality, static and dynamic stereochemistry of organotin compounds / M. Gielen --Coordination effects in formation and cross-linking reactions of organotin.

Other articles where Organotin compound is discussed: organometallic compound: Importance of organometallic compounds: A large number of organotin compounds, for example, are used as pharmaceuticals, pesticides, stabilizers for polyvinyl chloride, and fire retardants. Methylmercury has caused severe pollution problems as a result of its toxicity. This fact has led to stringent controls on . Mossbauer spectroscopic aspects of some sterically hindered organotin compounds. J. Saudi Chem. Soc. ; 7(1): 8. Abubshait HA, Al Mansour AI, Photoinduced ionic and free radical reactions of some organosilicon compounds. J. Saudi Chem. Soc. ;5(1): 75 9. Al Mansour AI, Abubshait HA and Eaborn C, J. Organomet. Chem. ;


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Halogenation of sterically hindered organotin compounds by Mustafa Al-Rawi Download PDF EPUB FB2

Halogen cleavage reactions of SnR n Ph 4–n have been explored as routes to sterically hindered organotin halides SnR n X 4 –n [R = hindered alkyl group: Pr i, CH 2 CMe 2 Ph, or C(SiMe 3) 3; n= 1 or 2].

While the method works well for simple alkyl groups reaction of X 2 (X = Cl or Br) with Sn[C(SiMe 3) 3]Ph 3 usually forms Sn[C(SiMe 3) 3]PhX compound Sn[C(SiMe 3) 3]X 3 can be formed Cited by: 5. INTRODUCTION Very little is known about sterically hindered organotin compounds. The low melting point of trineophyltin fluoride2'4 and the Mo5ssbauer parameters of the trineophyltin halides indicate a tetracoordinate structure for these compounds, whereas trimethyltin halides are associated and pentacoordinated in the solid even in Cited by: Organotin compounds or stannanes are chemical compounds based on tin with hydrocarbon substituents.

Organotin chemistry is part of the wider field of organometallic first organotin compound was diethyltin diiodide ((C 2 H 5) 2 SnI 2), discovered by Edward Frankland in The area grew rapidly in the s, especially after the discovery of the Grignard reagents.

Charles M. Marson, in Encyclopedia of Physical Science and Technology (Third Edition), III.D Radical Reactions. Halogenation of heterocycles at high temperature gives products in which the substitution pattern suggests that free radicals (rather than ionic halogen) are involved in their production.

Although neutral heteroaromatics often undergo alkylation by radical species in poor. Halogenation of sterically hindered organotin compounds. Author: Al-Rawi, Mustafa. Awarding Body: University of Sussex Current Institution: University of Sussex Date of Award: Availability of Full Text.

Sterically hindered group IVB organometallics X. Preparation and some properties of biphenylylsilicon and -tin compounds. Journal of Organometallic Chemistry63, DOI: /SX(73) Hans-Jürgen Götze. In the s, tributyltin and triphenyltin compounds (oxide, chloride, acetate, etc.) were introduced, replacing the copper oxide which had been used previously to reduce the growth of fouling.

The organotin compound was incorporated into the hull paint (“free association paints”), and slowly diffused out, providing protection for months.

Organic compounds which contain tin in the molecule. Used widely in industry and agriculture. | Explore the latest full-text research PDFs, articles, conference papers, preprints and more on. Therefore, organotin(IV) compounds are set as a wood preservatives such as tributyltin(IV) oxide and tributyltin(IV) naphthenate.

Based on Kizlink research in yeartriorganotin(IV) compounds are found to inhibit the growth of mycelium from wood-destroying fungi Coniophora puteana, Serpula lacrymans and mould suspensions. In the first stage, amidoamines 1, 2 were obtained according to a previously described procedure [].The reaction of compounds 1, 2 with benzyl bromide gave the sterically hindered phenol derivatives containing quaternary ammonium moiety SHPQ and SHPQ with yields of about 76% and 72%, respectively ().The structures of products SHPQ and SHPQ were established from their.

tin organometallic compounds: classification and analysis of crystallographic and structural data: part 1. MONOMERIC DERIVATIVES. Main Group Metal Chemistry23 (), Sn Mössbauer and Sn n.m.r. data are presented for a series of sterically hindered tetra-organotin derivatives.

For adamantyl (ad) derivatives two quadrupole splittings (q.s.) are observed and the values of the tin chemical shifts, δ( Sn), are significantly more negative (resonances at higher field) than Sn(ad) 4 shows the presence of q.s.

with values of and 0. Organotin compounds, or stannanes, are chemical compounds based on tin element bonded to carbon. These compounds are classified by the number of organic functional groups bond to tin i.e.

tetra- tri- di- and mono-organotin compounds. Compounds with one ‘Carbon-tin’ (C-Sn) bond are referred to as mono-substituted organotin compounds; two ‘C-Sn’ bonds are known as di. Structure organotin chemistry.

Journal of Organometallic Chemistry49 (1), DOI: /SX(00) M. Gielen, M. De Clercq. Organometallic compounds XXXV.

Physico-chemical properties of sterically hindered organotin compounds. Additional organotin derivatives containing oxygen donor ligands, other than carboxylates, were obtained from polyethyleneglycols, 4-acylpyrazolinones and from different kinds of phenolic compounds, as the polymeric derivatives of some O-(dialkyltin)stilbestrols and the dibutyltin 2-[N-(hydroxyalkyl)amino]phenoxides.

Both types of. The cytotoxicity of organotin compounds with hindered phenol groups was studied. • The assembly of tubulin microtubules is inhibited by organotin compounds. • The binding of compounds with tubulin as a target was studied by docking simulations.

• The compounds were found to inhibit the mitochondrial lipid peroxidation effectively. In Ref. [59], the authors presented a new methodology to prepare sterically overcrowded alkenes by using the Barton–Kellog method (Figure ). As versatile synthetic intermediates with a tetramethylindanylindane (stiff-stilbene) core, the cis and trans isomers of.

The organotin compounds can be divided into alkyltin and aryltin compounds. The trimethyl and triethyltin compounds are well absorbed from the gastrointestinal tract and are the most toxic in this group.

Triethyltin particularly produces status spongiosus of the white matter of the central nervous system. Most of the other alkyl and aryl tin. Inorg. Chem. All Publications/Website. OR SEARCH CITATIONS.

Halogenation of aromatic compounds. Aromatic compounds are subject to electrophilic halogenation: RC 6 H 5 + X 2 → HX + RC 6 H 4 X. This reaction works only for chlorine and bromine and is carried in the presence of a Lewis acid such as FeX 3 (laboratory method).

The role of the Lewis acid is to polarize the halogen-halogen bond, making the halogen molecule more electrophilic. Chemistry and Technology of Silicon and Tin by V. G. Kumar Das,available at Book Depository with free delivery worldwide. certain ΡΕΝΤΑ- and hexacoordinated organotin(iv) complexes of sterically hindered oximes derived from heterocyclic ß-diketones: synthetic and structural considerations.

main group metal chemistry18 (5) doi: /mgmcIn amine: Substitution. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO).With primary amines the reaction proceeds in two stages, producing N-chloro- Read More; organohalogen compounds.