Boron sulfides reactions with

Another boron sulfide, of stoichiometry BS2, can be made by heating B2S3 and sulfur to 300°C under very carefully defined conditions. It is a colourless, moisture-sensitive material with a porphine-like molecular structure, BgSig, as shown in Fig. 6.29b. An alternative route to BgSie involves the reaction of dibromotrithiadiborolane with trithiocarbonic acid in an H2S generator in dilute CS2 solution ... 

Hexfluorophosphate salts behave similarly.108 The diazonium tetrafluoroborates can be prepared either by precipitation from an aqueous solution by fluoroboric acid109 or by anhydrous diazotization in ether, THF, or acetonitrile using r-butyl nitrite and boron trifluoride.110 Somewhat milder reaction conditions can be achieved by reaction of aryl diazo sulfide adducts with pyridine-HF in the presence of AgF or AgNQ3. 

Bis(a-aminomethyl)phosphines having a mobile hydrogen atom could be expected to undergo a borylation reaction with borane, hydrogen being evolved. In fact, bis(Af-phenylaminomethyl)-phenylphosphine (199) and its sulfide (200) appeared to interact with borane under mild conditions, yielding a new type of phosphorus-boron-containing heterocycle—2-... 

Stereoselective reduction of some triazolodiazines (derivatives of ring systems 33 and 37) bearing chiral terpene residues has been elaborated by Groselj el al. <2006TA79>. With catalytic hydrogenation, partial saturation of the six-membered ring was experienced, while reaction with borane-methyl sulfide resulted in formation of triazole-boron complexes. 

Aldehydes can be converted into thioaldehydes by a similar reaction with bis(trimethylsilyl) sulfide catalyzed by BuLi (equation II). This disilyl sulfide has been used indirectly for conversion of aldehydes into thioaldehydes via boron trisulfide (11, 63). 

The reaction with 4-nitrophenol activated by 5-ethylthio-l-ff-tetrazole led to formation of the 4-nitrophenyl phosphite (step a). Among several boronating reagents tested borane-dimethyl sulfide gave the optimal yield of... 

Sulfide Boron sulfide, B2S3, white solid, unpleasant odor, irritating to the eyes, reactive with water to form boric acid and hydrogen sulfide, formed by reaction of boron oxide plus carbon heated in a current of CS2 ai red heat. 

FIGURE 81 The reaction container (10 mm i.d.) and the reaction equations for boron sulfides-assisted synthesis of matel polysulfides and sulfides xB(s) + yS(g) oBjSjtg) bBS2(g) + cS(g) m(metal oxide)(s) + t7B2S3(g) + bBS2(g) + cS(g) p(metal sulfide)(s) -qB203(v). The (s) stood for vitreous state. Reprinted with permission from Wu and Seo (2004). Copyright 2004 American Chemical Society. 

Other reported binary boron sulfides include subvalent B12S, a black crystalline material prepared by a high-temperature reaction of amorphous boron with elemental sulfur, and BS, which has been studied spectroscopically in an electric discharge. A vapor-phase dimer, (BS)2, was identified, and a refractory condensed form of BS was reported from the reaction of elemental boron with sulfur at 1850°C and a pressure of 94 500 atmospheres. Boron disulfide, BS2, has been identified in the gas phase and appears to be the primary compound present in the vapor phase over diboron trisulfrde or elemental boron and sulfur. 

Ignition or explosive reaction with metals (e.g., aluminum, antimony powder, bismuth powder, brass, calcium powder, copper, germanium, iron, manganese, potassium, tin, vanadium powder). Reaction with some metals requires moist CI2 or heat. Ignites with diethyl zinc (on contact), polyisobutylene (at 130°), metal acetylides, metal carbides, metal hydrides (e.g., potassium hydride, sodium hydride, copper hydride), metal phosphides (e.g., copper(II) phosphide), methane + oxygen, hydrazine, hydroxylamine, calcium nitride, nonmetals (e.g., boron, active carbon, silicon, phosphoms), nonmetal hydrides (e.g., arsine, phosphine, silane), steel (above 200° or as low as 50° when impurities are present), sulfides (e.g., arsenic disulfide, boron trisulfide, mercuric sulfide), trialkyl boranes. 

Mononuclear [Mo SP complexes are extremely rare orange-brown (L-N3)MoSCl2, produced upon reaction of (L-N3)MoOCl2 with boron sulfide, remains the only known example (110). The g values for (L-N3)MoSCl2 are all smaller than those for the corresponding [Mo 0] ... 

The retro reaction was accomplished with boron sulfide <77JA5521 > or tetraphosphorus decasulfide <64CB1298>. Several 2-selenones have also been prepared <92ZN(B)898, 94S809>. 

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