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Formation by Miscellaneous Reactions

On warming a P2H4/HF mixture from liquid Ng temperature to 0 C, PH3 vigorously forms along with other products [1]. [Pg.126]

For ab initio MO calculations related to the hypothetical reaction of H2C=PH3 with H2CO to give PH3 and oxirane, see [24]. [Pg.126]

Traces of PH3 were detected during the pyrolysis up to 700 C of certain clays in vacuum [25]. Bacteriological reduction of small amounts of inorganic phosphates to phosphane is assumed to occur in open-air sewage treatment plants or in sediments of shallow waters [26]. PH3 was also detected in ocean sediments and in the mud of Hamburg s harbor [28]. The occurrence of PH3 in the biosphere, in particular in human beings, cattle, and certain fishes, was investigated in [29]. [Pg.126]


CARBON-CARBON BOND FORMATION BY MISCELLANEOUS REACTIONS... [Pg.138]

Copolymer formation by miscellaneous reactions Hourston et al. [1991] have prepared compositions of 60-0 parts PBT and 16-40 parts EPDM in the presence of 0-60 parts copolymer of PBT with maleate ester (3.5% maleate) using a TSE at 255°C. A compatibilizing copolymer resulted from the crosslinking reaction between maleate olefinic groups and EPDM olefinic groups. Blends were characterized by mechanical properties and TEM. Model studies were performed to understand the crosslinking process. Blends were also prepared using an internal mixer at 250°C. [Pg.389]

Table 5.16 PA/PO blends copolymer formation by miscellaneous reactions ... Table 5.16 PA/PO blends copolymer formation by miscellaneous reactions ...
S.8.9.7 Blends Containing Unfunctionalized PPE + Functionalized PS PA-PS Copolymer Formation by Miscellaneous Reactions... [Pg.566]

Miscellaneous Reactions of Phosphines.- The role of chiral phosphines as ligands in the catalysis of reactions leading to the formation of chiral products has been reviewed.1111 A procedure for the determination of the enantiomeric excess in chiral phosphines has been developed, based on 13C n.m.r. studies of the diastereoisomeric complexes formed by phosphines with the chiral pinenyl nickel bromide complex. 111 Studies of the sulphonation of triphenylphosphine and of chiral arylphosphines have been reported in attempts to prepare water soluble ligands which aid... [Pg.14]

Miscellaneous Reactions.- A photochemical 1,3-migration is reported in the conversion of the thiophenyl sulphone (34) into the isomer (35). Irradiation of the fluoroalkene (36) results in the formation of the reduced-dechlorinated product (37) and the product (38), the result of a 1,2-phenyl migration. The compounds produced in this reaction are influenced by solvent and by the nature of the second halogen. Radical and cationic intermediates are thought to be involved. [Pg.251]

Miscellaneous. Reaction with ninhydrin and colorimetric detection of the reaction products (VI), and a moving wire in conjunction with a flame ionization detector (T7) have been used to detect proteins and peptides, but both methods have poor sensitivity. A recent innovation has been the development of reaction detectors for determining proteins with biological activity For example, lactate dehydrogenase can be detected by adding NAD and lactate to the column effluent and monitoring the formation of NADH either fluorometrically or absorptiometrically (S4). [Pg.263]

Miscellaneous Reactions of Phosphines.- The basicities of a series of bidentate phosphines have been determined by a study of their enthalpies of protonation with trifluoromethanesulphonic acid in 1,2-dichloroethane. Ring-opening of sultones via nucleophilic attack by nitrogen occurs on treatment with tri-(2-pyridyl)phosphine, with the formation of the water-soluble phosphine systems (91). A novel aldehyde-olefination procedure is afforded by the reactions of aldehydes, diazomethanes, and tertiary phosphines in the presence of a catalytic amount of the powerful Lewis acid methyltrioxorhenium. Attempts to prepare carboxyphenylphosphines by the ring metallation of triphenylphosphine followed by... [Pg.14]

Miscellaneous Reactions. In addition to the key reactions above, DDQ has been used for the oxidative removal of chromium, iron, and manganese from their complexes with arenes and for the oxidative formation of imidazoles and thiadia-zoles from acyclic precursors. Catal)ftic amounts of DDQ also offer a mild method for the oxidative regeneration of carbonyl compounds from acetals, which contrasts with their formation from diazo compounds on treatment with DDQ and methanol in nonpolar solvents. DDQ also provides effective catalysis for the tetrahydropyranylation of alcohols. Furthermore, the oxidation of chiral esters or amides of arylacetic acid by DDQ in acetic acid provides a mild procedure for the synthesis of chiral a-acetoxy derivatives, although the diastereoselectivity achieved so far is only 65-67%. ... [Pg.155]


See other pages where Formation by Miscellaneous Reactions is mentioned: [Pg.359]    [Pg.364]    [Pg.391]    [Pg.126]    [Pg.556]    [Pg.571]    [Pg.598]    [Pg.609]    [Pg.613]    [Pg.619]    [Pg.624]    [Pg.630]    [Pg.359]    [Pg.364]    [Pg.391]    [Pg.126]    [Pg.556]    [Pg.571]    [Pg.598]    [Pg.609]    [Pg.613]    [Pg.619]    [Pg.624]    [Pg.630]    [Pg.356]    [Pg.413]    [Pg.428]    [Pg.51]    [Pg.428]    [Pg.343]    [Pg.894]    [Pg.940]    [Pg.356]    [Pg.454]    [Pg.239]    [Pg.9]    [Pg.405]    [Pg.274]    [Pg.65]    [Pg.97]   


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Miscellaneous reactions

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