Big Chemical Encyclopedia

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

Articles Figures Tables About

Platinum tetrakis

Model Networks. Constmction of model networks allows development of quantitative stmcture property relationships and provide the abiUty to test the accuracy of the theories of mbber elasticity (251—254). By definition, model networks have controlled molecular weight between cross-links, controlled cross-link functionahty, and controlled molecular weight distribution of cross-linked chains. Sihcones cross-linked by either condensation or addition reactions are ideally suited for these studies because all of the above parameters can be controlled. A typical condensation-cure model network consists of an a, CO-polydimethylsiloxanediol, tetraethoxysilane (or alkyltrimethoxysilane), and a tin-cure catalyst (255). A typical addition-cure model is composed of a, ffl-vinylpolydimethylsiloxane, tetrakis(dimethylsiloxy)silane, and a platinum-cure catalyst (256—258). [Pg.49]

Tetrakis(triphenylphosphine) platinum [14221-02-4] M 1244.3, m 118". Recrystd by adding hexane to a cold saturated solution in CgHg. It is soluble in C Hg and CHCI3 but insoluble in EtOH and hexane. A less pure product is obtained if crystd by adding hexane to a CHCI3 soln. Stable in air for several hours and completely stable under N2. [7 Am Chem Soc 2323 7958.J... [Pg.481]

Tin, nitratodiphenyltris(dimethy) sulfoxide)-structure, 1,77 Tin, nitratotris(triphenyltin)-structure, 1, 47 Tin,tetrakis(acetato)-stereochemistry, 1,94 Tin, tetrakis(diethyldithiocarbamato)-angular parameters, 1, 57 Tin, tetrakis(ethyldithiocarbamato)-angular parameters, 1, 57 Tin, tetranitrato-stereochemistry, 1, 94 Tin, tri-n-butylmethoxy-, 3, 208 Tin alkoxides physical properties, 2, 346 Tin bromide, 3, 194 Tin bromide hydrate, 3,195 Tin carboxylates, 3, 222 mixed valence, 3, 222 Tin chloride, 3, 194 hydroformylation platinum complexes, 6, 263 Tin chloride dihydrate, 3,195 Tin complexes, 3, 183-223 acetyl ace tone... [Pg.235]

Decomposition of platinum hexafluoro-2,4-pentadionate, Pt(CF3COCHCOCF3)2 or tetrakis-trifluorophosphine, Pt(PF3)4 at 200-300°C in hydrogen. [Pg.94]

The trimeric platinum(O) complex [Pt3(CNBu )6] undergoes a double oxidative addition reaction with 2,2-bis(disilanyl)dithiane to give tetrakis(organosilyl)bis(/-butylisocyanide)platinum(IV) complexes.53 The Si—Ge bonds in bis(silylgermyl)dithiane are also cleaved by [Pt3(CNBu )6] giving analogous platinum(IV) complexes with Pt—Si and Pt—Ge bonds.53... [Pg.678]

Like the palladium(II) complexes, the platinum(II) porphyrins show appreciable phosphorescence even in aqueous media at room temperature in one study,169 singlet oxygen quantum yields ranged from 0.1 to 0.9 and were strongly influenced by dimerization/aggregation. Platinum(II) 5,10,15,20-tetrakis(/>-carboxyphenyl)porphyrin and platinum(II)coproporphyrin-I ((36) for Pd read Pt) have been studied as phosphorescent labels of antibodies for use in time-resolved microscopy.189... [Pg.977]

Table 1. Common materials used in quenched-fluorescence oxygen sensing (Ru(dpp)3(C104)2 tris(diphenylphenantroline) ruthenium(II) perchlorate PtOEPK platinum(II)-octaethyl-porphine-ketone PtPFPP platinum(II)-tetrakis(pentafluorophenyl)porphine PS.poly(styrene), PSu poly(sulfone) PSB poly(styrene-butadiene) block co-polymer PVC polyvinylchloride) APET amorphous poly(ethyleneterephthalate) PE poly(ethylene). Table 1. Common materials used in quenched-fluorescence oxygen sensing (Ru(dpp)3(C104)2 tris(diphenylphenantroline) ruthenium(II) perchlorate PtOEPK platinum(II)-octaethyl-porphine-ketone PtPFPP platinum(II)-tetrakis(pentafluorophenyl)porphine PS.poly(styrene), PSu poly(sulfone) PSB poly(styrene-butadiene) block co-polymer PVC polyvinylchloride) APET amorphous poly(ethyleneterephthalate) PE poly(ethylene).
A stoichiometric reaction of tetrakis(triphenylphosphine)platinum(0) with bis(pinacolato)diboron gives cis-diborylplatinum(n) complex in high yield (Scheme 3).38 The diborylplatinum complex then reacts with an alkyne, giving m-diboration product.40,41 These results indicate that the diboration proceeds through the general mechanism shown in Scheme 1 (E1 = E2 = Bpin), which involves the formation of diborylplatinum(n), insertion of an alkyne into the B-Pt bond, and reductive elimination. [Pg.728]

In view of excess phosphine being inhibitory in many catalytic reactions, it is surprising that the hydrophosphination reaction is not suppressed by the phosphines formed. In agreement with this, the product phosphine P(CH2CH2CN)3 is reluctant to form tetrakis(phosphine)platinum species, allowing the metal complex to be coordinatively unsaturated. Likewise, the... [Pg.27]

Caution. Triethylphosphine and tetrakis(triethylphosphine)platinum(0) are extremely air-sensitive. The phosphine is malodorous and toxic. Therefore all... [Pg.110]

Tetrakis(triethylphosphine)platinum(0) is extremely air sensitive and readily soluble in saturated aliphatic hydrocarbons. The complex can be stored under dry nitrogen in a freezer (-35°) for several months. The complex readily loses one of the coordinated phosphine molecules to give Pt(PEt3)36 (dissociation constant (K ) in heptane is 3.0 X 10" ). The H NMR spectrum measured in benzene-d6 shows two multiplets at 5 1.56 (CH2) and 1.07 ppm (CH3). Tetrakis-(triethylphosphine)platinum(O) is a strong nucleophile and reacts readily with chlorobenzene and benzonitrile to give a-phenyl complexes PtX(Ph)(PEt3)2 (X = Cl, CN).7 Oxidative addition of EtOH affords [PtH(PEt3)3] +. [Pg.111]

Platinum tetrakis(triphenylphosphine) see tetrakis(triphenylphosphine) platinum. [Pg.412]

In tris(bis( 1,2-diaminoethane)platinum(II)dichlorobis( 1,2-diaminoe-thane)platinum(IV) ] tetrakis[tetrachlorocuprate(I) ] (52), the anion is a chain in which two- and three-coordinated copper(I) alternate (see Section II,A,2). Pairs of three- and four-coordinated copper(I) atoms alternate in [P(CH3)4][Cu2C13] (60). The lCu2Cl3J anion in the tetra-... [Pg.17]

TETRAKIS(PROPANENITRILE)PLATINUM(II) TRIFLUOROMETHANESULFONATE AS A SUITABLE INTERMEDIATE IN SYNTHETIC Pt(II) CHEMISTRY... [Pg.279]

See other pages where Platinum tetrakis is mentioned: [Pg.197]    [Pg.62]    [Pg.63]    [Pg.193]    [Pg.678]    [Pg.679]    [Pg.689]    [Pg.703]    [Pg.719]    [Pg.724]    [Pg.385]    [Pg.728]    [Pg.178]    [Pg.203]    [Pg.99]    [Pg.190]    [Pg.100]    [Pg.110]    [Pg.110]    [Pg.114]    [Pg.437]    [Pg.32]    [Pg.246]    [Pg.279]    [Pg.281]    [Pg.282]    [Pg.282]    [Pg.283]    [Pg.283]   
See also in sourсe #XX -- [ Pg.27 ]

See also in sourсe #XX -- [ Pg.369 ]

See also in sourсe #XX -- [ Pg.434 ]

See also in sourсe #XX -- [ Pg.73 , Pg.81 ]

See also in sourсe #XX -- [ Pg.7 , Pg.9 ]



SEARCH



© 2024 chempedia.info