Lithium sulfide

The second step is also heterogeneous and involves the breakdown of the intermediate compound with further lithiation into lithium sulfide [12136-58-2] and finely divided iron [7439-89-6] particles. 

Lithium aluminum hydride normally reacts with thiiranes via nucleophilic attack on carbon, but where that process is hindered sulfur is attacked to give the alkene, usually in good yield, and lithium sulfide (70JPR421). 

A fluorinated dithiaparacyclophane is prepared from lithium sulfide and 1,4 bis(broinomethyl)tetrafluorobenzene [48] (equation 43)... 

Lithium forms the following compounds lithium oxide, LiaO lithium hydroxide, LiOH lithium sulfide, Li2S. Name and write the formulas of the corresponding sodium and potassium compounds. 

Kaun TD, Nelson PA, Redey L, Vissers DR, Henriksen GL (1993) High temperature Lithium/Sulfide batteries. Electrochim Acta 38 1269-1287... 

EXAMPLE 6.14. Write the formulas for (lithium iodide, (c) aluminum sulfate, and ([Pg.104]

Larger chalcogen-phosphorus heterocycles, although less common in the literature, are accessible via a variety of synthetic routes.2,83,84 For example, the cyclic trimer (SPR)3 (R = 2,4,6-tri-tert-butylphenyl) contains a puckered six-membered P3S3 ring and is produced in the reaction of a phosphinic chloride with lithium sulfide (Equation 73).98 Additionally (R P)3Se5 (R = 2,4-di-tert-butyl-6-wopropoxyphenyl), synthesised from the oxidation of a primary phosphine with three equivalents of elemental selenium (Equation 74), has... 

A procedure developed by Prof. Olah based on the use of lithium sulfide as a base is well suitable for silylation of nitro derivatives of the cyclohexane series (180, 181) (Scheme 3.53). 

Ring opening of the cyclic boronated triphosphate was achieved by the action of lithium sulfide (step d) and the 3 -OH group was deprotected by an NH3-H20-Me0H system (step e). 

There are also several variations on this procedure. The use of trimethylsilyl triflate (TMSOTQ provides the silyl nitronate of methyl nitroacetate in good yield. However, for primary nitroalkanes, a second silylation occurs at the a-position of the nitronate (Eq. 2.5) (102). The use of TMSCl in the presence of lithium sulfide provides good yields of silyl nitronates from secondary nitroalkanes (103,104). Unfortunately, the number of examples is limited and this procedure is not applicable to primary nitroalkanes. 

Disilathianes, for example (SiH3)2S and [(CH3)3Si] 2S, have been prepared by several routes, namely, the reaction of iodosilane with silver8 and mercuric2 sulfides halosilanes with lithium sulfide,7 [NH4]SH,9 and [Me3NH]SH7 disilaselenane with H2S10 and trisilylphosphine with sulfur.10 Recently, the synthesis of hexamethyldisilathiane, [(CH3)3Si] 2S, was described from the protolysis of l-(trimethylsilyl)imidazole with H2S and from the dehydrohalogen-ation of chlorotrimethylsilane and H2S with a tertiary amine.11 Both of these methods require about 18 hours. 

The ionic compound lithium sulfide forms between the elements lithium and sulfur. In which direction are electrons transferred to form ionic bonds, and how many electrons are transferred ... 

The nature of the aryl substituent attached to phosphorus has a subtle influence on the ring size of the organophosphorus-sulfur heterocycle obtained from the reactions of ArPCl2 (Ar = aryl) and a source of sulfide. The six-membered ring cyclo-(Mes PS)3 is formed from treatment of Mes PCl2 with lithium sulfide the P3S3 ring adopts a chair conformation with the sulfur atoms... 

The reaction of tetrachlorodisilane with chalcogenation reagents is one of the synthetic methods to bis-nor-adamantane or double-decker type compounds. When a solution of di-terf-butyltetrachlorodisilane 66 in THF is refluxed together with one equivalent of lithium sulfide or stirred with lithium selenide at room temperature, the tetra(ferf-butylsilicon)pentachalcogenides 67 and 68, respectively, are formed (Scheme 18)6. Each pentachalcogenide exhibits one resonance of a ferf-butyl group in the H and 13C NMR spectra. Most likely, the bis-nor-adamantane derivatives 69 and 70 are initially formed. Insertion of a sulfur or selenium atom into one of the two strained Si—Si bonds would then lead to the observed products. 

On the other hand, when di-terf-butyltetrachlorodigermane (71) is reacted with lithium sulfide at —78°C, the corresponding bis-nor-adamantane 72 is formed along with pen-tasulfide (64a) (Scheme 19). Presumably, due to the long Ge—Ge bond distance, 72 is less strained than the silicon analogues 69 and 70, and thus sulfur insertion is less favored. 

Gunatilaka et al. <1999JOC2694> reported the synthesis of the thietane-derived 5,20-thiapaclitaxel derivative 33 by the action of lithium sulfide on the oxirane-derived paclitaxel derivative 122. This reaction led to the thietane derivative 33 in 56% yield and to minor amounts (13%) of 1,2-dithiolane-derived taxol 123 (Scheme 18). 

Using the periodic table if necessary, write formulas for the following compounds (a) hydrogen sulfide, (b) barium chloride, (c) ammonium phosphate, (d) aluminum sulfate, (e) calcium bromide, (f) lithium sulfide, and (g) sodium fiuoride. 

Ans. (a) Lithium sulfide, Li2S (h) Barium sulfide, BaS (c) Aluminum sulfide, AI2S3... 

A gas-producing reaction occurs when you mix hydroiodic acid (HI) with an aqueous solution of lithium sulfide. Bubbles of hydrogen sulfide gas form in the container during the reaction. Lithium iodide is also produced in this reaction and remains dissolved in the solution. 

The reactants hydroiodic acid and lithium sulfide exist as ions in aqueous solution. Therefore, you can write an ionic equation for this reaction. The complete ionic equation includes all of the substances in the solution. 

For the introduction of the TMS group under neutral conditions, trimethylsilyl chloride can be activated with lithium sulfide.Also trimethylsilylketene acetals (39), silyl enol ethers (40) (in particular those of pentane-2,4-dione), A -trimethylsilylacetamide (41), A, 0-bis(trimethylsilyl)acetamide (42), A A -bis(trimethylsilyl)urea (43) and A, 0-bis(trimethylsilyl)carbamate (44) are effective silylating agents under neutral conditions (Scheme 39). ... 

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