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Diphenyl diselenide is the chemical compound with the formula (C 6 H 5) 2 Se 2, abbreviated Ph 2 Se 2. This yellow-coloured solid is the oxidized derivative of benzeneselenol . It is used as a source of the PhSe unit in organic synthesis .
This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.
Diphenyl disulfide is usually prepared by the oxidation of thiophenol: . 2 PhSH + I 2 → Ph 2 S 2 + 2 HI Hydrogen peroxide can also be used as the oxidant. [2] Ph 2 S 2 is rarely prepared in the laboratory because it is inexpensive, and the precursor has a disagreeable odour.
Carbon diselenide, CSe 2, a yellow-orange oily liquid with pungent odor; Any organic chemical compound with a selenium-selenium bond, R-Se-Se-R (see Organoselenium chemistry) Diphenyl diselenide, (C 6 H 5)–Se–Se–(C 6 H 5) selenocystine; Metal dichalcogenides. Manganese diselenide (MnSe 2) Molybdenum diselenide (MoSe 2) Tungsten diselenide ...
More so than thiophenol, benzeneselenol is easily oxidized by air. The facility of this reaction reflects the weakness of the Se-H bond, bond dissociation energy of which is estimated to be between 67 and 74 kcal/mol. [1] In contrast, the S-H BDE for thiophenol is near 80 kcal/mol. [3] The product is diphenyl diselenide as shown in this idealized equation:
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The methylene group in diphenylmethane is mildly acidic with a pK a of 32.2, and so can be deprotonated with sodium amide. [3](C 6 H 5) 2 CH 2 + NaNH 2 − → (C 6 H 5) 2 CHNa + NH 3. The resulting carbanion can be alkylated.
Dibenzylideneacetone or dibenzalacetone, often abbreviated dba, is an organic compound with the formula C 17 H 14 O. It is a pale-yellow solid insoluble in water, but soluble in ethanol.