|
Bismuthyl
Bismuthyl means a chemical species formally derived from the element bismuth and can refer to substituents bonded to the rest of a molecule through a bismuth atom, including: * derivatives of bismuthanes, BiR3, such as the diphenylbismuthyl group, Ph2Bi–, found in the ion h2Bi−(Ge9)−BiPh2sup>2− * trivalent bismuth species when considered as ligands, such as the tribromobismuthyl ligand, Br3Bi→ In inorganic chemistry bismuthyl has been used to describe compounds such as BiOCl which were assumed to contain the diatomic bismuthyl, BiO+, cation, that was also presumed to exist in aqueous solution. This diatomic ion is not now believed to exist. References {{reflist Bismuth compounds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bismuth Oxychloride
Bismuth oxychloride is an inorganic compound of bismuth with the formula Bi O Cl. It is a lustrous white solid used since antiquity, notably in ancient Egypt. Light wave interference from its plate-like structure gives a pearly iridescent light reflectivity similar to nacre. It is also known as pearl white. Structure The structure of bismuth oxychloride can be thought of as consisting of layers of , and ions (in the image Bi = grey, O = red, Cl = green). These ions are ordered as Cl–Bi–O–Bi–Cl–Cl–Bi–O–Bi–Cl, i.e., with alternating anions (, ) and cations (). The layered structure gives rise to the pearlescent properties of this material. Focusing on the coordination environment of the individual ions, the bismuth centers adopt a distorted square antiprismatic coordination geometry. The Bi atom is coordinated to four Cl atoms, forming one of the square faces, each at a distance of 3.06 Å from Bi, and four O atoms forming the other square face, each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bismuthine
Bismuthine (IUPAC name: bismuthane) is the chemical compound with the formula BiH3. As the heaviest analogue of ammonia (a pnictogen hydride), BiH3 is unstable, decomposing to bismuth metal well below 0 °C. This compound adopts the expected pyramidal structure with H–Bi–H angles of around 90°. The term ''bismuthine'' may also refer to a member of the family of organobismuth(III) species having the general formula , where R is an organic substituent. For example, Bi(CH3)3 is ''trimethylbismuthine''. Preparation and properties BiH3 is prepared by the redistribution of methylbismuthine (BiH2Me):Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001.. :3 BiH2Me → 2 BiH3 + BiMe3 The required BiH2Me, which is also thermally unstable, is generated by reduction of methylbismuth dichloride, BiCl2Me with LiAlH4. As suggested by the behavior of SbH3, BiH3 is unstable and decomposes to its constituent elements according to the following equa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bismuth Tribromide
Bismuth tribromide is an inorganic compound of bismuth and bromine with the chemical formula BiBr3. Preparation It may be formed by the reaction of bismuth oxide and hydrobromic acid. : Bismuth tribromide can also be produced by the direct oxidation of bismuth in bromine. : Structure Bismuth tribromide adopts two different structures in the solid state: a low-temperature polymorph α-BiBr3 that is stable below 158 °C and a high-temperature polymorph β-BiBr3 that is stable above this temperature. Both polymorphs are monoclinic but α-BiBr3 is in space group ''P''21/a whereas β-BiBr3 is in ''C''2/m. α-BiBr3 consists of pyramidal molecules whereas β-BiBr3 is polymeric and adopts the AlCl3 structure. BiBr3 is the only group 15 trihalide that can adopt both molecular and polymeric structures. Reactivity Bismuth bromide is highly water-soluble. It is a Lewis acid A Lewis acid (named for the American physical chemist Gilbert N. Lewis) is a chemical species that contains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |