Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Complexes anionic

They are prepared by the action of HNO2 on aromatic amines. The amine is dissolved in excess of mineral acid and sodium nitrite is added slowly until a slight excess of HNO2 is present. The reaction is usually carried out in ice-cold solution. The solution then contains the diazonium salt of the mineral acid used, anhydrous diazonium salts of unpredictable stability may be precipitated with complex anions like PF , SnCl6 BF4 . [Pg.133]

Complexes. These derivatives contain complex anions which may be considered as derived from co-ordination of an H" ion to a metal or non-metal. Examples are the BH4" and ReHg " ions. [Pg.208]

Silver chloride is readily soluble in ammonia, the bromide less readily and the iodide only slightly, forming the complex cation [Ag(NH3)2]. These halides also dissolve in potassium cyanide, forming the linear complex anion [AglCN) ] and in sodium thiosulphate forming another complex anion, [Ag(S203)2] ... [Pg.428]

If the coordination entity is negatively charged, the cations paired with the complex anion (with -ate ending) are listed first. If the entity is positively charged, the anions paired with the complex cation are listed immediately afterward. [Pg.222]

Aqueous solutions of caustic soda aie highly alkaline. Hence caustic soda is ptimatily used in neutralization reactions to form sodium salts (79). Sodium hydroxide reacts with amphotoric metals (Al, Zn, Sn) and their oxides to form complex anions such as AlO, ZnO. SnO ", and (or H2O with oxides). Reaction of AI2O2 with NaOH is the primary step during the extraction of alumina from bauxite (see Aluminum compounds) ... [Pg.514]

These compounds perform a dual function in synthesis procedures. The introduction of a complex anion assists in the stabilization of the desired product and the generation of unique intermediates by chloride displacement, eg, silver hexafluorophosphate, AgPF, forms adducts with neutral diamagnetic organometaHics which can act as controUed sources of highly reactive cations (29). Silver hexafluoroantimonate, AgSbF, is an electrophilic... [Pg.235]

Iron hahdes react with haHde salts to afford anionic haHde complexes. Because kon(III) is a hard acid, the complexes that it forms are most stable with F and decrease ki both coordination number and stabiHty with heavier haHdes. No stable F complexes are known. [FeF (H20)] is the predominant kon fluoride species ki aqueous solution. The [FeF ] ion can be prepared ki fused salts. Whereas six-coordinate [FeCy is known, four-coordinate complexes are favored for chloride. Salts of tetrahedral [FeCfy] can be isolated if large cations such as tetraphenfyarsonium or tetra alkylammonium are used. [FeBrJ is known but is thermally unstable and disproportionates to kon(II) and bromine. Complex anions of kon(II) hahdes are less common. [FeCfy] has been obtained from FeCfy by reaction with alkaH metal chlorides ki the melt or with tetraethyl ammonium chloride ki deoxygenated ethanol. [Pg.436]

Kinetics. Details of the kinetics of polymerization of THF have been reviewed (6,148). There are five main conclusions. (/) Macroions are the principal propagating species in all systems. (2) With stable complex anions, such as PF , SbF , and AsF , the polymerization is living under normal polymerization conditions. When initia tion is fast, kinetics of polymerizations in bulk can be closely approximated by equation 2, where/ is the specific rate constant of propagation /is time [I q is the initiator concentration at t = 0 and [M q, [M and [M are the monomer concentrations at t = 0, at equiHbrium, and at time /, respectively. [Pg.363]

Alkali sihcates are used as components, rather than reactants, in many appHcations. In many cases they only contribute partially to overall performance. Utility factors are generally not as easy to identify. Their benefit usually depends on the surface and solution chemical properties of the wide range of highly hydrophilic polymeric siUcate ions deUverable from soluble sihcate products or their proprietary modifications. In most cases, however, one or two of the many possible induences of these complex anions cleady express themselves in final product performance at a level sufficient to justify their use (102). Estimates of the 1995 U.S. consumption of sodium sihcates are shown in Table 6. [Pg.12]

After preparing a homogeneous solution of the precursors, powder precipitation is accompHshed through the addition of at least one complexing ion. For PLZT, frequently OH in the form of ammonium hydroxide is added as the complexing anion, which results in the formation of an amorphous, insoluble PLZT-hydroxide. Other complexing species that are commonly used are carbonate and oxalate anions. CO2 gas is used to form carbonates. Irrespective of the complexing anion, the precipitated powders are eventually converted to the desired crystalline oxide phase by low temperature heat treatment. [Pg.346]

In this work, the results of study of zinc thiocyanate complexes anion-exchange extraction by non-symmetric QASes in toluene ai e discussed. The non-symmetric QASes have the common formula [(C,3H g03)N(CH3) (C,H Q3 J-X-, where C,3H3 03 - highly lipophilic substituent, (2, 3, 4-tn. s-dodecyloxy)benzyl. It was found that exchange... [Pg.275]

Other finite-complex anions occur in the oxyfluorides. For example the hydrated salts K2[- S2F]q0].H20 and Rb2[As2F]oO].H20... [Pg.571]

Figure 13.12 Schematic representation of the structure of the complex anion LSbjCIiiO] " showing the two different coordination geometries about Sb and the unique quadruply bridging Cl atom. Figure 13.12 Schematic representation of the structure of the complex anion LSbjCIiiO] " showing the two different coordination geometries about Sb and the unique quadruply bridging Cl atom.
In all the cluster compounds discussed above there are sufficient electrons to form 2-centre 2-electron bonds between each pair of adjacent atoms. Such is not the case, however, for the cationic bismuth species now to be discussed and these must be considered as electron deficient . The unparalleled ability of Bi/BiCb to form numerous low oxidation-state compounds in the presence of suitable complex anions has already been mentioned (p. 564) and the cationic species shown in Table 13.12 have been unequivocally identified. [Pg.590]

The complex anion [ScFe] " has already been mentioned and, while there is a fairly extensive series of halo complexes with a... [Pg.950]

All the tetrahalides, but especially the chlorides and bromides, behave as Lewis acids dissolving in polar solvents to give rise to series of addition compounds they also form complex anions with halides. They are all hygroscopic and hydrolysis follows the same pattern as complex formation, with the chlorides and bromides being more vulnerable than the fluorides and iodides. TiCU fumes in and is completely hydrolysed by... [Pg.964]

There is also clear evidence of a change from predominantly class-a to class-b metal charactristics (p. 909) in passing down this group. Whereas cobalt(III) forms few complexes with the heavier donor atoms of Groups 15 and 16, rhodium(III), and more especially iridium (III), coordinate readily with P-, As- and S-donor ligands. Compounds with Se- and even Te- are also known. Thus infrared. X-ray and nmr studies show that, in complexes such as [Co(NH3)4(NCS)2]" ", the NCS acts as an A -donor ligand, whereas in [M(SCN)6] (M = Rh, Ir) it is an 5-donor. Likewise in the hexahalogeno complex anions, [MX ] ", cobalt forms only that with fluoride, whereas rhodium forms them with all the halides except iodide, and iridium forms them with all except fluoride. [Pg.1129]

The coordination chemistry of Zn" and Cd", although much less extensive than for preceding transition metals, is still appreciable. Neither element forms stable fluoro complexes but, with the other halides, they form the complex anions [MX3] and [MX4] , those of Cd" being moderately stable in aqueous solution. "" By using the large cation [Co(NH3)6] + it is also possible to isolate the trigonal bipyramidal [CdCls] "... [Pg.1215]

With both these pseudo halides, an excess produces complex anions [HgX3] and the tetrahedral [HgX4]2-. [Pg.1218]

Several carboxylates, both simple salts and complex anions, have been prepared often as a means of precipitating the An ion from solution or, as in the case of simple oxalates, in order to prepare the dioxides by thermal decomposition. In K4[Th(C204)4].4Fl20 the anion is known to have a 10-coordinate, bicapped square antipris-matic structure (Fig. 31.8b). -diketonates are precipitated from aqueous solutions of An and the ligand by addition of alkali, and nearly all are sublimable under vacuum. [An(acac)4], (An = Th, U, Np, Pu) are apparently dimorphic but both structures are based on an 8-coordinate, distorted square antiprism. [Pg.1277]


See other pages where Complexes anionic is mentioned: [Pg.68]    [Pg.179]    [Pg.317]    [Pg.320]    [Pg.247]    [Pg.386]    [Pg.436]    [Pg.439]    [Pg.390]    [Pg.201]    [Pg.346]    [Pg.367]    [Pg.375]    [Pg.108]    [Pg.317]    [Pg.1023]    [Pg.254]    [Pg.381]    [Pg.564]    [Pg.568]    [Pg.569]    [Pg.670]    [Pg.776]    [Pg.788]    [Pg.913]    [Pg.1218]    [Pg.1265]    [Pg.233]    [Pg.173]    [Pg.220]   
See also in sourсe #XX -- [ Pg.190 ]

See also in sourсe #XX -- [ Pg.7 , Pg.8 , Pg.33 , Pg.53 , Pg.109 , Pg.112 ]




SEARCH



Acetonitrile Complex Cations with Triflate Anions

Actinide anionic complexes

Alkali metal complexes acid anions

Alkaline earth metal complexes anions

Alkylidyne-metal complexes anion structure

Alkyne complexes anionic donor ligands

Allyl reaction with anionic chromium complex

Aluminium anionic complexes

Aluminum complex compounds anions, oxalato

Anion Complexes with Calixarenes

Anion Separations Involving Complex Formation

Anion acid complexes

Anion cation complexing agents

Anion complex notation

Anion complexation

Anion complexation

Anion complexer strength

Anion complexes anionic adducts

Anion complexes gold dithiocarbamates

Anion complexes mono

Anion complexes nickel dithiocarbamates

Anion copper-containing complex

Anion exchange complex

Anion exchangers, complexation

Anion lanthanide complexation

Anion recognition lanthanide complexes

Anion relative complexation ability

Anion structures cyanide-bridged complexes

Anion structures pentanuclear complexes

Anion structures trinuclear complexes

Anion, , complex

Anion, , complex

Anion-cation sublattices, complex

Anion-host complexes

Anion-neutral complex

Anionic alkyl and aryl chromium complexes

Anionic alkyl complexes

Anionic bromide complexes

Anionic carbonyl complexes

Anionic complexes macrocycles

Anionic complexes, trivalent uranium

Anionic halide complexes

Anionic hydroxy complexes

Anionic iridium complexes

Anionic ligands five-coordinate complexes

Anionic palladium complexes

Anionic polymerization alkali metal complexes

Anionic polymerization complex architectural polymer

Anionic polymerization complex bases

Anionic rhodium complexes

Anionic ruthenium complexes

Anionic ruthenium complexes, luminescence

Anionic structure mono complexes

Anionic tetrahedron complex

Anionic thiocarbonyl complex

Anionic-cationic complex

Anionic—amphoteric complex

Anions excited state complexes

Anions lanthanide complexes

Anions ruthenium polypyridine complexes

Anions tropolonato complexes

Anions, tendency toward complex formation

Anodic Homocoupling of Anions, at-Complexes, Organometallics and Phenolates

Arsenic chloride complex anions

Aza-macrocycles for anion complexation

Beryllium complex compounds, anions

Beryllium complexes anionic

Boron complexes anionic

Boron transition-metal complex anion

Boron trifluoride complex anion formation

Calixarenes anion complexation

Carbene complex chromium anionic

Carbene complexes, alkyl pentacarbonylalkylation anions

Carborane anions, metal complexes

Cation-acid anion complexes

Cation-anion complexes

Cation/anion complex formation

Cationic and anionic complexes

Cationic and anionic complexes (PPh

Cationic-anionic sublattices, complex

Cationic-anionic sublattices, complex oxidation

Chromium anionic complexes

Chromium complex compounds anions, oxalato

Chromium complex compounds, anions

Chromium complex tetracarbonyl anion

Chromium complexes carbonyl anion

Cobalt anionic sandwich complexes, reaction

Cobalt complex compounds anions, carbonyl

Cobalt complex compounds, anions

Cobalt complex compounds, anions structure

Cobalt complex compounds, anions with pyridine

Cobalt complexes, anionic

Complex Formation of Anionic Surfactants with Aromatic Compounds

Complex alkyl-metal anions

Complex anions formation

Complex anions nomenclature

Complex anions rotation

Complex anions sizes

Complex anions stability

Complexation anionic

Complexes anion centred

Complexes anionic acetato

Complexes anionic metal hydrides

Complexes of Thiazyl Halides NSX (X F, Cl, Br), NSF3 and the Anion

Complexes of the 3 anion

Complexes of the and 2-Anions

Complexes with monocarboxylic acid anions

Complexes with weakly bonded anions

Complexes, cationic and anionic (PMe

Complexes, cationic and anionic (cont

Compounds with Complex Anions

Coordination geometry in pentacoordinate anionic complexe

Copper complex anion hosts

Copper complex compounds anions, with

Copper complex compounds, anions

Copper complexes anionic

Cr-bonded anionic carbon complexes

Cr-bonded anionic carbon complexes, alkyl

Cyclopentadienyl anion dinuclear complexes

Cyclopentadienyl complexes anionic

Cytochrome-anion complex

Dye Salts with Complex Anions

Electrosynthesis of complexes containing weakly acidic anions

Enolate anions, malonate complexes

Fluorides complex anion

Formation of a (Non-solvated) Complex Anion

Formazan anionic complexes

Formyl complexes anions

From complex transition metal anions and halides

Gallium transition-metal complex anion

Glycine, complex anions with

Gold complex compounds, anions

Gold complexes anionic nitrogen donor ligands

Guanidines guanidine-anion complexes

Halides anionic vanadium complexes

Halides transition-metal complex anion

Heterocycle-lanthanide complexes, anion

Heterogeneous Two-Phase Distribution Analysis of Complexation in Anion Exchangers

Hexacoordinate silicon compounds anionic complexes

Homoleptic anionic complexe

Homoleptic anionic complexe ligands

Homoleptic anionic complexe methyl ligands

Hydride anionic complexes

Hydrogen-bond complexes anion recognition

Hydroxide anion complexes

III) Complexes with the Weakly Bonded Anions and

Indium transition-metal complex anion

Iridium complex compounds anions, with pyridine, cis- and

Iridium complexes hydroxy anions

Iron , hydrido complex anion

Iron complex anion

Iron complex compounds anions, carbonyl

Iron complex compounds, anions

Iron complex compounds, anions potassium salt

Iron complex compounds, anions with pyridine

Iron complex compounds, anions, oxalato

Iron complexes anionic

Iron, anionic carbonyl complexes

Kinetics complex anions

Labile Complexes as Anion Hosts

Macrobicycles anionic complexes

Macromonocycles anionic complexes

Macrotricycles anionic complexes

Manganese complex compounds anions, carbonyl

Manganese complexes anions

Manganese complexes carbonyl anions

Mercury anionic complexes distribution

Metal Complexes and Anions

Metal Complexes of Sulfimido, and Sulfenamido Anions

Metal complexes, anion sensing

Metal-carbene complexes anions

Metals in complex anions

Molybdenum complex compounds, anions, with

Molybdenum complexes, anion

Molybdenum complexes, anion, with

Mono complexes anionic adducts

Neutral and Anionic Complexes

Nickel , hydrido complex anion

Nickel anionic ethylene complexes

Nickel complex compounds, anions

Nickel complexes anions

Niobium complexes anionic

Nitrogen heterocycles, anionic complexes

Osmium , hydrido complex anion

Palladium complex compounds, anions

Pentacoordinate germanium complexes anionic

Phosphides with Complex Anions

Phosphorescence colors, anionic complexes

Platinum complex compounds anions, with 1,4-butadiene

Platinum complex compounds anions, with ethylene

Platinum complex compounds, anions

Platinum complexes anionic carbonyl clusters

Platinum hydrido complex anions

Polyazamacrocycles anionic complexes

Polynuclear anion-bridged complexes

Protonated aza-macrocycles, for anion complexation

Protonic Acids with Non-Complex Anions

Protonic acids with complex anions

Rare Earth Complexes as Luminescent Chemosensors for Anions

Reactions of Anionic Complexes with Organic Halides

Receptor-anion complex

Rhenium , hydrido complex anion

Rhodium complex compounds anions, aquo

Rhodium complexes anions

Rhodium complexes bidentate anions

Ruthenium , hydrido complex anion

Ruthenium complexes, anion

Ruthenium complexes, reactions anionic species

Selenium complex anions

Seleno anions metal complexes

Silicon transition-metal complex anions

Silver complexes anionic

Silyl-transition metal complexes anionic derivatives

Solvents Ionic with complex anion

Steroid-based anion complexation agents

Strong Complexation in Anion-Exchanger Phase

Structure enzyme-anion complexes

Substrate anion cobalt complex

Substrate binding enzyme-anion complexes

Synthesis of complexes containing classically noncoordinating anions as ligands

Tantalum complexes anionic

Tantalum complexes anions

Thallium complexes anionic derivatives

The Role of Redox Processes in Reactions Catalyzed by Nickel and Palladium Complexes with Anionic Pincer Ligands

Thio anions metal complexes

Three-Phase Distribution Analysis for Complexation in Anion Exchangers

Titanium anionic complexes

Titanium complexes anionic ligands

Transition Metal Complexes Containing Anionic or Cationic Ligands

Transition metal complexes with weakly bonded anions

Transition-metal complex anions

Trialkyl germanium reaction with anionic vanadium complexes

Triphospholyl anions, formation ruthenium cyclopentadienyl complexes

Tris borate anion, complex with

Tropolonato complexes anionic

Tungsten complex compounds, anions

Tungsten complexes anionic pentacarbonyl

Vanadium complexes carbonyl anion

Xanthate complexes anion structures

Zinc complex compounds, anions

Zirconium complex compounds, anion

© 2024 chempedia.info