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Arsenide anions

Reaction of arsenide anions with organic electrophiles... [Pg.817]

This method has also been quite useful for the synthesis of triorganoarsenic compounds. Arsenide anions, which can be prepared by several methods (vide infra), react with alkyl and aryl halides. Several examples are shown in equations 18 , 19 , 20 °, 21 , 22 23 , 24 and 25 . In the reaction with alkyl halides inversion of configuration at the sp carbon atom takes place and in the reaction of vinyl halides retention of configuration has been observed (equations 18 and 21). Photostimulated reaction with aryl halides has been reported to proceed via the Sjj l mechanism thus, the ketone group is compatible with the reaction conditions as shown in equation 23 . [Pg.817]

Reaction of arsenide anions with protic acids such as water gives the corresponding hydrides (equations 117 and 118 ). [Pg.831]

Alkylation of arsenide anions derived from primary arsines... [Pg.832]

Primary arsines give arsenide anions which react with alkyl halides to afford secondary arsines (equation 119) . [Pg.832]

Organolithium, Grignard reagents and alkali metals react with arsenic hydrides to give the corresponding arsenide anions as shown in equations 17560.62.186 176 , 177 ->6ia 178 , 179 and 180 . ... [Pg.841]

Reaction of arsenide anions or arsines with As-halogen bonds... [Pg.841]

This method has also been quite useful for the synthesis of triorganoarsenic compounds. Arsenide anions, which can be prepared by several methods vide infra), react with alkyl and aryl halides. Several examples are shown in equations 18" , 19", 20 , 21 22, ... [Pg.817]

The nickel arsenide structure is shown in Figure 1.18. Arsenide ions in identical close-packed layers are stacked directly over each other, with nickel ions filling all the octahedral holes. The larger arsenide anions are in a trigonal prism of nickel cations. Both types of ion have a coordination number of six. [Pg.18]

In accordance with the electropositive nature of the bridgehead atoms, all di(pyridyl) substituted anions behave like amides with the electron density accumulated at the ring nitrogen atoms rather than carbanions, phosphides or arsenides. The divalent bridging atoms (N, P, As) in the related complexes should in principle be able to coordinate either one or even two further Lewis acidic metals to form heterobimetallic derivatives. According to the mesomeric structures, (Scheme 7), it can act as a 2e- or even a 4e-donor. However, theoretical calculations, supported by experiments, have shown that while in the amides (E = N) the amido nitrogen does function as... [Pg.96]

No, the editor didn t know what this name meant either.) It means salts of the triva-lent anions of Group V, restricted in [1] to arsenides, antimonides and bismuthides and prepared by reaction of sodium pnictides with anhydrous halides of transition and lanthanide metals. This violently exothermic reaction may initiate as low as 25°C. Avoidance of hydrated halides is cautioned since these are likely to react uncontrollably on mixing. Another paper includes a similar reaction of phosphides, initiated by grinding [2], Nitrides are reported made from the thermally initiated reaction of sodium azide with metal halides, a very large sealed ampoule is counselled to contain the nitrogen [3],... [Pg.253]

These are usually reactions of anhydrous transition and B metal halides with dry alkali metal salts such as the sulphides, nitrides, phosphides, arsenides etc. to give exchange of anions. They tend to be very exothermic with higher valence halides and are frequently initiated by mild warming or grinding. Metathesis is... [Pg.258]

The term S] is defined by the authors as an ionicity factor and assumes a value of 0.5 for oxides and silicates, 0.75 for halides, 0.40 for calcogenides, 0.25 for phosphides and arsenides, and 0.2 for nitrides and carbides (Z is the anion charge). Equation 1.94 is based on the thermal expansion data listed in table 1.15. [Pg.57]

It is also likely that other anions of high negative charge, e.g. phosphide, arsenide, antimonide or even silicide ions, can be stabilized by interaction with strong Lewis acids. [Pg.156]

As Arsenide, diarsenide and mixed anions such as As22, AsS2-... [Pg.845]

The trend observed with the polycyclic hydrocarbons (see preceding section), namely that the product radical anions (ArNu ) are more stable than those derived from the simple benzene analogs, is even more evident with the heteroaromatic substrates and, as a consequence, fragmentation processes are minimized.41 For example, 2-chloroquinoline is the only substrate of many studied to undergo a substitution reaction with PhCH2S- ion without fragmentation of the benzyl-S bond,103 and to react with diphenyl-arsenide ion without scrambling of the aryl moieties.25... [Pg.462]

Arsenide An arsenic atom with a valence state of —3. A mineral or other compound where the major anion is As3-. [Pg.440]

Arsenosulfide A mineral or other compound containing both arsenide and sulfide as the major anions. Arsenopyrite (FeAsS) is an arsenosulfide mineral (compare with thioarsenic). [Pg.440]


See other pages where Arsenide anions is mentioned: [Pg.831]    [Pg.831]    [Pg.124]    [Pg.831]    [Pg.831]    [Pg.124]    [Pg.42]    [Pg.223]    [Pg.2397]    [Pg.164]    [Pg.133]    [Pg.322]    [Pg.197]    [Pg.200]    [Pg.1510]    [Pg.27]    [Pg.550]    [Pg.34]    [Pg.39]    [Pg.16]    [Pg.164]    [Pg.702]    [Pg.23]   


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Arsenides

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