Abstract

[13292-87-0] C2H9BS (MW 75.96) InChI = 1S/C2H6S.BH3/c1-3-2;/h1-2H3;1H3 InChIKey = RMHDLBZYPISZOI-UHFFFAOYSA-N (hydroborating and reducing agent) Alternate Name: BMS. Physical Data: d420 = 0.801 g cm−3. Solubility: sol dichloromethane, benzene, toluene, xylene, hexane, diethyl ether, diglyme, DME, and ethyl acetate; insol but reacts slowly with water; reacts with alcohols, acetone. Form Supplied in: neat complex, colorless liquid, ca. 10 M in BH3; contains slight excess of dimethyl sulfide. Analysis of Reagent Purity: active hydride is determined by hydrolysis of an aliquot in glycerol–water–methanol mixture and measuring the hydrogen evolved according to a standard procedure.3a 11B NMR (CH2Cl2) δ −20.1 ppm (q, JB–H = 104 Hz).4 Preparative Method: Diborane generated by the reaction of Sodium Borohydride with Boron Trifluoride Etherate in diglyme3 is absorbed in Dimethyl Sulfide. Purification: commercial reagent can be purified and freed of excess dimethyl sulfide by vacuum transfer.2 Handling, Storage, and Precautions: use in a fume hood; flammable liquid with stench; reacts with atmospheric moisture forming a crust of boric acid. Store and handle under nitrogen or argon. Stable indefinitely when kept at 0 °C. Stable for prolonged periods at rt.

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