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Bismuthides metal

Bismuthides. Many intermetaUic compounds of bismuth with alkafl metals and alkaline earth metals have the expected formulas M Bi and M Bi, respectively. These compounds ate not saltlike but have high coordination numbers, interatomic distances similar to those found in metals, and metallic electrical conductivities. They dissolve to some extent in molten salts (eg, NaCl—Nal) to form solutions that have been interpreted from cryoscopic data as containing some Bi . Both the alkafl and alkaline earth metals form another series of alloylike bismuth compounds that become superconducting at low temperatures (Table 1). The MBi compounds are particularly noteworthy as having extremely short bond distances between the alkafl metal atoms. [Pg.127]

All three carboa—bismuth boads of trihen zylhismuthine [99715-52-3], C2 H2 Bi, (64) and triphenylbismuthine (65) can be cleaved by alkafl metals. Under some conditions, however, tertiary bismuthines react with sodium or potassium to yield secondary bismuthides. Thus a number of sodium dialkylbismuthides have been obtained by the iateraction of a trialkylbismuthine and sodium ia Hquid ammonia (66—69) ... [Pg.131]

A number of compounds of the types RBiY2 or R2BiY, where Y is an anionic group other than halogen, have been prepared by the reaction of a dihalo- or halobismuthine with a lithium, sodium, potassium, ammonium, silver, or lead alkoxide (120,121), amide (122,123), a2ide (124,125), carboxylate (121,126), cyanide (125,127), dithiocarbamate (128,129), mercaptide (130,131), nitrate (108), phenoxide (120), selenocyanate (125), silanolate (132), thiocyanate (125,127), or xanthate (133). Dialkyl- and diaryUialobismuthines can also be readily converted to secondary bismuthides by treatment with an alkali metal (50,105,134) ... [Pg.132]

Arsenides, antimonides and bismuthides. A number of salt-like related binary compounds formed with these semi-metals pertain to the following structure types NaCl, NiAs, ZnS, Na3As, FeS2, etc. [Pg.514]

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]

Whereas palladium is divalent in the non-metallic PdP2, the pyrite structure of the diarsenide and diantimonide suggests a Pd valency of four, although these compounds show metallic properties. The metallic behaviour of the bismuthide is not surprising since the metallic character increases with heavier anions. PdBi2 crystallizes in two modifications... [Pg.131]

An alloy of a T metal with a B element of Gps. VB and VIB often has intermediate phases quite different from those of the constituent elements. They frequently have structures like NiAs (p. 149) examples are the arsenides, antimonides, bismuthides, sulphides, selenides and tellurides of many T metals. The binding is partly covalent and partly ionic. [Pg.146]

Metal arsenides, antimonides and bismuthides can be prepared by direct combination of the metal and group 15 element. Like the phosphides, classification is not simple, and structure types vary. Our coverage here is, therefore, selective... [Pg.402]

Phosphides, Arsenides, Antimonides and Bismuthides of Alkali Metals from the Elements... [Pg.985]

One of the simplest cases is that of the AsPn4 (A=K, Rb, Cs Pn=As, Sb, Bi) compounds [99]. They exhibit metallic behavior (the bismuthides even become superconducting at low temperatures) and contain tetrameric Pn4... [Pg.122]

Mellor cites the phenomenon of a temperature rise of 30 g of molten gold at 1155°C after addition of only 0.3 g of aluminum. The latter, being cold, caused an initial drop to 1045°, whereupon the temperature rose to 1380°C. A perusal of Circular 500, as well as of the books by Kubaschewski and Evans and Kubaschewski and Caterall, " shows numerous strongly exothermic reactions between metals as expressed by the heat of formation of arsenides, antimonides, bismuthides, aliiminides, and others. [Pg.279]

A phonon contribution with an additional cubic term can be used to analyze the resistivity behavior of the metallic bismuthides YbAgBi and YbAuBi (Merlo et al. 1995). An anomaly occurs in the temperature dependence of the resistivity of YbCuBi at about 375 K, most likely resulting from a structural phase transition from the high-temperature ZrBeSi to the low-temperature NdPtSb modification. The anomaly in the resistivity is paralleled by a drop of the da ratio of the lattice parameters in the same temperature range. [Pg.496]

Numerous metal phosphides, arsenides, antimonides, bismuthides, and so on, have been prepared, and the metal alloying properties of As, Sb and Bi have been recognised since ancient times. The usefulness of P is more limited and knowledge of the properties of mixed pnictide metal alloys involving P is generally less well developed. [Pg.112]

Similar bismuthide complexes have also been observed in the stepwise addition of PhjBiCl to the [Fe(CO)J anion (Scheme 15.19) [162,193]. Sequential addition of PhjBiCl affords the mono- (64) and his-bismuthide (65) complexes. Based on the ability of the [Ph2BiFe(CO)4] anion to coordinate unsaturated metal centers via the hismuthide ligand s lone pair [193], formation of the his-bismuthide complex is proposed to proceed through a disbismuthine-like transition state. [Pg.539]


See other pages where Bismuthides metal is mentioned: [Pg.537]    [Pg.537]    [Pg.554]    [Pg.319]    [Pg.514]    [Pg.108]    [Pg.456]    [Pg.22]    [Pg.202]    [Pg.28]    [Pg.230]    [Pg.554]    [Pg.506]    [Pg.503]    [Pg.520]    [Pg.536]    [Pg.537]    [Pg.538]    [Pg.538]    [Pg.540]    [Pg.543]    [Pg.544]   


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