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With Transition Metals

Tin(ll) chloride, SnCl2, stannous chloride. M.p. 247 - C. While solid (Sn plus gaseous HCl), forms hydrates (SnCl2,2H20 is tin salt) from Sn and aqueous HCl. Acts as acceptor in complexes and forms complexes with transition metals. Used as a mordant. [Pg.398]

PM3/TM is an extension of the PM3 method to include d orbitals for use with transition metals. Unlike the case with many other semiempirical methods, PM3/TM s parameterization is based solely on reproducing geometries from X-ray diffraction results. Results with PM3/TM can be either reasonable or not depending on the coordination of the metal center. Certain transition metals tend to prefer a specific hybridization for which it works well. [Pg.37]

ZINDO/1 and ZINDO/S are Dr. Michael Zerner s INDO versions and used for molecular systems with transition metals. ZINDO/1 is expected to give geometries of molecules, and ZINDO/S is parametrized to give UV spectra. [Pg.127]

The duoroborate ion has traditionally been referred to as a noncoordinating anion. It has shown Httie tendency to form a coordinate—covalent bond with transition metals as do nitrates and sulfates. A few exceptional cases have been reported (13) in which a coordinated BF was detected by infrared or visible spectroscopy. [Pg.164]

Reactions with Transition-Metal Compounds. The numerous pubhshed products of reactions of transition-metal compounds with a2iridines can be divided into complexes in which the a2iridine ring is intact, compounds formed by reaction of a2iridine with the ligands of a complex, and complexes in which the a2iridine molecule is fragmented (imido complexes). [Pg.10]

Eithei oxidation state of a transition metal (Fe, Mn, V, Cu, Co, etc) can activate decomposition of the hydiopeioxide. Thus a small amount of tiansition-metal ion can decompose a laige amount of hydiopeioxide. Trace transition-metal contamination of hydroperoxides is known to cause violent decompositions. Because of this fact, transition-metal promoters should never be premixed with the hydroperoxide. Trace contamination of hydroperoxides (and ketone peroxides) with transition metals or their salts must be avoided. [Pg.228]

With transition-metal activators, the initiation process is postulated as ... [Pg.228]

Chemical Properties. Higher a-olefins are exceedingly reactive because their double bond provides the reactive site for catalytic activation as well as numerous radical and ionic reactions. These olefins also participate in additional reactions, such as oxidations, hydrogenation, double-bond isomerization, complex formation with transition-metal derivatives, polymerization, and copolymerization with other olefins in the presence of Ziegler-Natta, metallocene, and cationic catalysts. All olefins readily form peroxides by exposure to air. [Pg.426]

Reactions involving the peroxodisulfate ion are usually slow at ca 20°C. The peroxodisulfate ion decomposes into free radicals, which are initiators for numerous chain reactions. These radicals act either thermally or by electron transfer with transition-metal ions or reducing agents (79). [Pg.96]

Phosphite triesters, P(OR)3, form donor complexes with transition metals and other acceptors and are oxidized to the respective phosphates under appropriate conditions. [Pg.368]

Thiocyanates are rather stable to air, oxidation, and dilute nitric acid. Of considerable practical importance are the reactions of thiocyanate with metal cations. Silver, mercury, lead, and cuprous thiocyanates precipitate. Many metals form complexes. The deep red complex of ferric iron with thiocyanate, [Fe(SCN)g] , is an effective iadicator for either ion. Various metal thiocyanate complexes with transition metals can be extracted iato organic solvents. [Pg.151]

Cordierite [12182-53-5] Mg Al Si O g, is a ceramic made from talc (25%), kaolin (65%), and Al O (10%). It has the lowest thermal expansion coefficient of any commercial ceramic and thus tremendous thermal shock resistance. It has traditionally been used for kiln furniture and mote recently for automotive exhaust catalyst substrates. In the latter, the cordierite taw materials ate mixed as a wet paste, extmded into the honeycomb shape, then dried and fired. The finished part is coated with transition-metal catalysts in a separate process. [Pg.302]

Cychc polyarsines undergo a number of reactions with transition metal compounds to form complexes containing both As—As and As—metal bonds. The stmctural chemistry of these complexes has been the subject of a recent review (112). [Pg.337]

Aminoboranes have been used as ligands in complexes with transition metals (66) in one instance giving a rare example of two-coordinate, non-t/ transition-metal complexes. The molecular stmcture of the iron complex Fe[N(Mes)B(Mes)2]2 where Mes = is shown in Figure 1. The... [Pg.263]

Other Reactions. Due to the highly reactive conjugated double bonds, butadiene can undergo many reactions with transition metals to form organometaHic complexes. For instance, iron pentacarbonyl reacts with butadiene to produce the tricarbonyl iron complex (10) (226). This and many other organometaHic complexes have been covered (227). [Pg.346]

Carbon monoxide was discovered in 1776 by heating a mixture of charcoal and 2inc oxide. It provided a source of heat to industry and homes as a component of town gas and was used as a primary raw material in German synthetic fuel manufacture during World War II its compounds with transition metals have been studied extensively (see Carbonyls). Most recently, carbon monoxide emission from vehicle exhausts has been recognized as a primary source of air pollution (qv). [Pg.48]

The discovery by Ziegler that ethylene and propylene can be polymerized with transition-metal salts reduced with trialkyl aluminum gave impetus to investigations of the polymerization of conjugated dienes (7—9). In 1955, synthetic polyisoprene (90—97% tij -l,4) was prepared using two new catalysts. A transition-metal catalyst was developed at B. E. Goodrich (10) and an alkaU metal catalyst was developed at the Ekestone Tke Rubber Co. (11). Both catalysts were used to prepare tij -l,4-polyisoprene on a commercial scale (9—19). [Pg.530]

It has been postulated that the syn TT-ahyl stmcture yields the trans-1 4 polymer, and the anti TT-ahyl stmcture yields the cis-1 4 polymer. Both the syn and anti TT-ahyl stmctures yield 1,2 units. In the formation of 1,2-polybutadiene, it is beheved that the syn TT-ahyl form yields the syndiotactic stmcture, while the anti TT-ahyl form yields the isotactic stmcture. The equihbtium mixture of syn and anti TT-ahyl stmctures yields heterotactic polybutadiene. It has been shown (20—26) that the syndiotactic stereoisomers of 1,2-polybutadiene units can be made with transition-metal catalysts, and the pure 99.99% 1,2-polybutadiene (heterotactic polybutadiene) [26160-98-5] can be made by using organolithium compounds modified with bis-pipetidinoethane (27). At present, the two stereoisomers of 1,2-polybutadiene that are most used commercially are the syndiotactic and the heterotactic stmctures. [Pg.530]

The Schiff basses derived from salicylaldehydes polydentate ligands ai e known to form very stable complexes with transition metal ions [1]. [Pg.284]

Zincon disodium salt (o-[l-(2-bydroxy-5-sulfo)-3-pbenyl-5-formazono]-benzoic acid di-Na salt) [135-52-4, 56484-13-0] M 484.4, m -250-260 (dec). Zincon soln is prepared by dissolving 0.13g of the powder in aqueous N NaOH (2mL diluted to lOOmL with H2O). This gives a deep red colour which is stable for one week. It is a good reagent for zinc ions but also forms stable complexes with transition metal ions. [UV-VIS Bush and Yoe Anal Chem 26 1345 1954 Hunter and Roberts J Chem Soc 820 1941 Platte and Marcy Anal Chem 31 1226 1959] The free acid has been recrystd from dilute H2SO4. [Fichter and Scheiss Chem Ber 33 751 1900.]... [Pg.498]

A variety of routes is available for the preparation of metal-thionitrosyl complexes. The most common of these are (a) reaction of nitride complexes with a sulfur source, e.g., elemental sulfur, propylene sulfide or sulfur halides, (b) reaction of (NSC1)3 with transition-metal complexes, and (c) reaction of [SN]" salts with transition-metal complexes. An example of each of these approaches is given in Eq. 7.1,... [Pg.123]

A variety of complexes of the thionyl imide anion [NSO] with both early and late transition-metal complexes have been prepared and structurally characterized. Since both ionic and covalent derivatives of this anion are readily prepared, e.g., K[NSO], McsMNSO (M = Si, Sn) or Hg(NSO)2, metathetical reactions of these reagents with transition-metal halide complexes represent the most general synthetic method for the preparation of these complexes (Eq. 7.10 and 7.11). ... [Pg.135]

The combination of hard (A) and soft (5) coordination in the 1,5-P2N4S2 ring system leads to a diversity of coordination modes in complexes with transition metals (Lig. 13.1). In some cases these complexes may be prepared by the reaction of the dianion [Ph4P2N4S2] with a metal halide complex, but these reactions frequently result in redox to regenerate 13.3 (L = S, R = Ph). A more versatile approach is the oxidative addition of the neutral ligand 13.3 (L = S) to the metal centre. [Pg.263]

Alkali-metal graphites are extremely reactive in air and may explode with water. In general, reactivity decreases with ease of ionization of M in the sequence Li > Na > K > Rb > Cs. Under controlled conditions H2O or ROH produce only H2, MOH and graphite, unlike the alkali-metal carbides M2C2 (p. 297) which produce hydrocarbons such as acetylene. In an important new reaction CgK has been found to react smoothly with transition metal salts in tetrahydrofuran at room temperature to give the corresponding transition metal lamellar compounds ... [Pg.295]

Periodates form numerous complexes with transition metals in which the octahedral unit acts as a bidentate chelate. Examples are ... [Pg.875]


See other pages where With Transition Metals is mentioned: [Pg.131]    [Pg.141]    [Pg.226]    [Pg.278]    [Pg.307]    [Pg.112]    [Pg.136]    [Pg.232]    [Pg.527]    [Pg.119]    [Pg.348]    [Pg.324]    [Pg.120]    [Pg.464]    [Pg.50]    [Pg.592]    [Pg.592]    [Pg.592]    [Pg.602]    [Pg.234]    [Pg.451]    [Pg.98]    [Pg.136]    [Pg.637]    [Pg.697]   


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2.4- Dimethyl-9-hydroxypyrido with transition metals

Aliphatic carbon-centered radicals reaction with transition metal

Alkenes complexes with transition metals

Alkyl halides with transition metal reagents

Alkyl hydroperoxides reaction with transition metals

Alkylation with transition metal catalysts

Alkynes, reactions with transition metal complexes

Alloying with Transition Metals

Allylic with transition metals

Amide oxides reactions with transition metal atoms

Analysis of Heavy and Transition Metals with Spectrophotometric Detection

Associated with Transition Metal Oxides

Asymmetric catalysis with transition metal

Bridged macrocyclic complexes with trivalent transition metal ions

Carbenes, complexes with transition metals

Carbenes, complexes with transition metals electronic structure

Carbenes, complexes with transition metals rearrangement

Carbon Electrophiles with Dienes and Polyenes Promoted by Transition Metals

Carbon dioxide complexes with transition metals

Carbon dioxide reactions with transition metal complexes

Carbon monoxide with transition metals

Carbon—transition-metal bonds reactions with

Catalytic hydrogenation with chiral transition metal complexes

Clusters with more than four transition-metal atoms

Clusters with seven or more transition-metal atoms

Clusters, transition metal with interstitial atoms

Cobalt complexes with transition metal acceptors

Complex formation transition metal cation with

Complex salts with transition metals

Complexes of the Transition Metals with

Complexes of the Transition Metals with G. Booth

Complexes of the Transition Metals with Phosphines, Arsines, and Stibines

Complexes, with transition-metals

Compounds with Bonds Between Transition and Main Group Metals

Compounds with Heteronuclear Transition Metal Bonds

Compounds with Homonuclear Transition Metal Bonds

Compounds with Transition Metals

Coordination with Transition Metals

Cubane reactions with transition metal complexes

Cubanes reactions with transition metal complexes

Cycloadditions diazoalkanes with transition metal

Cyclopentane reaction with transition metal complexes

Cyclopentanes reaction with transition metal complexes

Cyclopropanes reactions with transition metal complexes

Cyclopropenones with Transition-metal Compounds

Cytochrome electron transfer with transition metals

Cytochrome with transition metal complexes

DFT Methods Benchmarking against Systems with Transition Metal Species

Degenerate Metathesis with Early Transition-Metal Catalysts

Dinitrogen complexes with transition metals

Dioxygen with transition metals

Doping with Transition Metals

Dynamic Behavior of d Transition Metal Complexes with n-Donor Two-Center Ligands

Early Transition and Rare Earth Metal Complexes with N-Heterocyclic Carbenes

Ethylene polymerization, with Lewis acid transition metal

Ethylene with sigma-bonded transition metal

First-Row Transition Metal Oxide Nanocomposites with Unusual Performance

Fluorescent Sensors for and with Transition Metals (Fabrizzi

Fluorophosphines with transition metals

Germanium—transition-metal bonds reactions with

Germylenes complexes with transition metals—

Group 14 amides with transition metal complexe

Group-IIIB-transition metal bonds reactions with

Hard Catalysis with Transition Metal Compounds

Heterogenized transition metal catalysts polymerization with

Homogeneous Catalysis with Transition Metal Catalysts

Hydrogen peroxide reaction with transition metal ions

Illustration 1 Transition Metal Oxides with Vertex-Sharing Octahedra

Illustration 3 Transition Metal Monoxides with Edge-Sharing Octahedra

Imido ligands transition metal complexes with

Interaction with Toxic Transition Metals

Isomerism transition metal complexes with

Lead halides reactions with transition metal anion

Ligands with transition metals

Main group element oxides reactions with transition metal complexes

Modeling with Transition-metal Complexes

Molecular catalysts designing, with active transition metals

Molecular catalysts designing, with transition metals

Nitric oxide complexes with transition metals

Nitrogen complexes with transition metals

Nucleophilic displacement with transition metal catalysis

Olefin transition-metal complexes correlation with

Olefination with transition metal derivatives

Organometallic Complexes with Silicon-Carbon-Transition Metal Bonds

Organometallic Complexes with Silicon-Transition Metal Bonds

Organosilicon compounds reaction with transition metals

Oxidation with transition metal salts

Oxygen reaction with transition metals

Ozone with transition metals

Peroxides reactions with transition metals

Phosphido complexes reaction with transition metal

Phosphine transition metal complexes with

Photolysis with transition-metal complexes

Polyphosphazenes with transition metals

Potassium with transition metal chlorides

Predictions for hydrogen storage in carbon nanostructures coated with light transition metals

Reaction with transition metal ions

Reactions in Combination with Transition-metal Catalysts

Reactions of Carbon Monoxide with Transition Metals

Reactions of Isocyanides with Transition Metal Compounds

Reactions of Silanes with Transition Metals

Reactions of Transition Metal Compounds with Alkylating or Arylating Reagents

Reactions of phosgene with transition metal organometallics

Reactions with carbon electrophiles transition metal catalysis

Reactions with dienes transition metal catalysis

Reactions with transition metal chlorides

Reactions with transition metal reagents

Reactions with transition-metal complexes

Reactions with transition-metal oxides

Reactions with transition-metal sulfates

Schiff bases, complexes with transition metals

Semiempirical method for transition metal complexes with open (-shells

Semiempirical method, for transition metal complexes with open

Silane with transition metal ions

Silanol complexes with group 9 transition metals

Silyl complexes with group 3 transition metals

Silylene complexes with group 6 transition metals

Site-Specific Internal Functionalization of Nucleic Acids with Transition-Metal Ligands and Other Moieties

Soft Catalysis with Transition Metal Compounds

Stannylenes complexes with transition metals—

Stereoregular Polymerization with Transition Metal Alkyls

Stoichiometric reaction of sulfur dioxide with transition metal complexes

Styrene with transition metal allyl compounds

Terminal alkynes with Group 9 transition metals

Thallium-transition-metal bonds reactions with

The Coordination Chemistry of Sulfoxides with Transition Metals

The Coordination Chemistry of Sulfoxides with Transition Metals J. A. Davies

The Reactivity of Transition Metal Complexes with Dihydrogen

The Reactivity of Transition Metal Complexes with Dinitrogen

The Reactivity of Transition Metal Complexes with Oxygen

The Reactivity of Transition Metal Complexes with Small Molecules

Transfer with transition metal compound

Transformation of Transition Metal Compounds in Reactions with Polymers

Transition Metal Analysis with Spectrophotometric Detection

Transition Metal Catalysts with Phosphine Ligands

Transition Metal Complexes with CO, N2, NO and O2 Ligands

Transition Metal Complexes with Group

Transition Metal Complexes with Group IVB Elements

Transition Metal Complexes with Group J. F. Young

Transition Metal Dimer Complexes in Reactions with Polymers

Transition Metal Ions cubic perovskites with

Transition Metal Oxides with Partially Filled d Bands

Transition Metals Have Electron Configurations with Incomplete d or f Shells

Transition Metals with Imidazoline Nitroxides

Transition metal Lewis acid coordination with

Transition metal alkyl compounds stereoregular polymerizations with

Transition metal allyl complexes with -

Transition metal atoms reactions with organic substrates

Transition metal catalysts with copper

Transition metal catalysts with iridium

Transition metal catalysts with molybdenum

Transition metal catalysts with nickel

Transition metal catalysts with platinum

Transition metal catalysts with rhodium

Transition metal catalysts with ruthenium

Transition metal catalysts with tungsten

Transition metal complexes compounds formed with

Transition metal complexes reaction with electrophiles

Transition metal complexes reactivity with small molecules

Transition metal complexes with 1,2-dithiolene

Transition metal complexes with acetonitrile

Transition metal complexes with acetylene

Transition metal complexes with alkynes

Transition metal complexes with copper

Transition metal complexes with diazo compounds

Transition metal complexes with diazonium compounds

Transition metal complexes with ethylene

Transition metal complexes with ionic

Transition metal complexes with isocyanates

Transition metal complexes with isonitriles

Transition metal complexes with isothiocyanates

Transition metal complexes with molybdenum carbonyls

Transition metal complexes with nitriles

Transition metal complexes with sulfur

Transition metal complexes with weakly

Transition metal complexes with weakly bonded anions

Transition metal halides reactions with organolithium compounds

Transition metal hydride complexes, reactions with dienes

Transition metal hydrides, reactions with

Transition metal interaction with second phases

Transition metal ions with hydrocarbons

Transition metal ions, cross-linking with

Transition metal ions, reaction with silane

Transition metal reaction with carbon dioxide

Transition metal salts/complexes with hydrogen peroxide

Transition metal stereoregular polymerizations with

Transition metal substituted polyoxometalate 4 with

Transition metal-catalyzed coupling of organometallic reagents with organic halides and related electrophiles

Transition metals boratabenzenes with

Transition metals carbon reaction with

Transition metals disilene complexes with

Transition metals hydrosilylation with catalyst

Transition metals interactions with lipid

Transition metals oxidation with dimethyl sulfoxide

Transition metals reaction with

Transition metals silene complexes with

Transition metals sites with Lewis acidic properties

Transition metals with dimethyl sulfoxide

Transition metals with hydrogen peroxide

Transition metals with organic ligands

Transition metals with oxygen

Transition metals, bonds with arsenic

Transition metals, compared with lanthanide

Transition metals, complexes with pyridines

Transition metals, photoreactive complexes with ionic halocarbons

Transition-metal carbonyl reactions with

Transition-metal complexes with thiocyanate

Transition-metal-coordinated alkenes reactions with

Transition-metal-coordinated carbonyls reactions with

Triosmium Clusters with Introduced Transition Metal Atoms

Why Do Hydration Heats of Transition-Metal Ions Vary Irregularly with Atomic Number

With Transition Metal Elements

With transition metal catalysts

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