Lithium antimonide

Metallic Antimonides. Numerous binary compounds of antimony with metallic elements are known. The most important of these are indium antimonide [1312-41 -0] InSb, gallium antimonide [12064-03-8] GaSb, and aluminum antimonide [25152-52-7] AlSb, which find extensive use as semiconductors. The alkali metal antimonides, such as lithium antimonide [12057-30-6] and sodium antimonide [12058-86-5] do not consist of simple ions. Rather, there is appreciable covalent bonding between the alkali metal and the Sb as well as between pairs of Na atoms. These compounds are useful for the preparation of organoantimony compounds, such as trimethylstibine [594-10-5] (CH2)2Sb, by reaction with an organohalogen compound. 

Lithium amide, 15 129, 137 Lithium antimonide, 3 58 Lithium batteries, 15 135-136, 611 Lithium-bearing minerals, 15 122 Lithium bentonite, 6 696 Lithium benzoate, 3 635 15 137 Lithium bismuthide, alloy-like... 

Lithium antimonide, Li3Sb.—Since the direct combination of lithium and antimony is very violent, Lebeau 5 recommends preparing the antimonide by the electrolysis of a fused mixture of lithium and potassium chloride with an iron cathode covered with antimony. It is a dark-grey, crystalline substance of a very reactive nature. Its density at 17° C. is 3 2, and its melting-point is 9503 C. The compound is also formed by the action of antimony on a solution of lithium in liquefied ammonia.6... 

Metalation of RR SbH with BuLi gives the chiral lithium antimonide RR SbLi [R = 2-(Me2NCH2C6H4, R = CH(SiMe3)2] (4) that forms RR SbNa after transmetalation with BuONa in the presence oftetramethylethylenediamine. The pendant amine arm of (4) is coordinated to the alkali metal center. 

Monomeric carbene complexes with 1 1 stoichiometry have now been isolated from the reaction of 4 (R = Bu, adamantyl or 2,4,6-trimethylphenyl R = H) with lithium l,2,4-tris(trimethylsilyl)cyclo-pentadienide (72). The crystal structure of one such complex (R = Bu) revealed that there is a single cr-interaction between the lithium and the carbene center (Li-C(carbene) 1.90 A) with the cyclopentadienyl ring coordinated in an if-fashion to the lithium center. A novel hyper-valent antimonide complex has also been reported (73). Thus, the nucleophilic addition of 4 (R = Mes R = Cl) to Sb(CF3)3 resulted in the isolation of the 1 1 complex with a pseudo-trigonal bipyramidal geometry at the antimony center. 

Individually indexed alloys or intermetallic compounds are Aluminium amalgam, 0051 Aluminium-copper-zinc alloy, 0050 Aluminium-lanthanum-nickel alloy, 0080 Aluminium-lithium alloy, 0052 Aluminium-magnesium alloy, 0053 Aluminium-nickel alloys, 0055 Aluminium-titanium alloys, 0056 Copper-zinc alloys, 4268 Ferromanganese, 4389 Ferrotitanium, 4391 Lanthanum-nickel alloy, 4678 Lead-tin alloys, 4883 Lead-zirconium alloys, 4884 Lithium-magnesium alloy, 4681 Lithium-tin alloys, 4682 Plutonium bismuthide, 0231 Potassium antimonide, 4673 Potassium-sodium alloy, 4646 Silicon-zirconium alloys, 4910... 

Lead—tin alloys, 4877 Lead—zirconium alloys, 4878 Lithium—magnesium alloy, 4676 Lithium—tin alloys, 4677 Plutonium bismuthide, 0231 Potassium antimonide, 4668 Potassium—sodium alloy, 4641 Silicon—zirconium alloys, 4904 Silver—aluminium alloy, 0002 Silvered copper, 0003 Sodium germanide, 4412 Sodium—antimony alloy, 4791 Sodium—zinc alloy, 4792 Titanium—zirconium alloys, 4915... 

The synthesis of alkali metal 1,4,2-diphosphastibolides parallels that of the 1,4,2-diphosphaarsolides 18 and 19. It is however regiospecific and no 1,2,4-isomer is formed. For the synthesis, a DME solution of lithium bis(trimethylsi-lyl)antimonide 31 (M = Li) is treated with 3equiv of the phosphaalkene 29. In the course of the reaction, the phosphaalkene 29 is converted to the phosphaalkyne 30 via the base-catalyzed elimination of hexamethyl disiloxane (Scheme 7). Alternatively, the phosphaalkyne 30 can be used directly in place of the phosphaalkene. After addition of TMEDA or 12-crown-4, the lithium 1,4,2-diphosphastibolide 22 (M = Li(TMEDA)2) or Li(12-crown-4)2 is isolated <1997JOM291>. 

The thermodynamic properties of aluminum antimonide have been previously studied by the electromotive force (emf) method using aluminum chloride as the electroljrte in fused lithium and potassium chlorides [4], The calculated value [4] of the standard entropy of solid aluminum antimonide S 98 = 6.0 0.8 eu/g-atom and that obtained by Piesbergen [5] from measurements of low-temperature specific heat, = 7.68 0.05 eu/g-atom do not agree even within the... 

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