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Other methods for the α-hydroxylation of carbonyl compounds may employ toxic organometallic compounds (such as lead tetraacetate or osmium tetroxide). One alternative to hypervalent iodine oxidation that does not employ heavy metals is the attack of a metal enolate on dioxygen, followed by reduction of the resulting peroxide (equation ( 14 )).
Similarly to its use in baking, sodium bicarbonate is used together with a mild acid such as tartaric acid as the excipient in effervescent tablets: when such a tablet is dropped in a glass of water, the carbonate leaves the reaction medium as carbon dioxide gas (HCO 3 − + H + → H 2 O + CO 2 ↑ or, more precisely, HCO 3 − + H 3 O + → 2 ...
2 Al + 2 NaOH + 2 H 2 O → 2 NaAlO 2 + 3 H 2 Sodium aluminate is an inorganic chemical that is used as an effective source of aluminium hydroxide for many industrial and technical applications. Pure sodium aluminate (anhydrous) is a white crystalline solid having a formula variously given as NaAlO 2 , Na 3 AlO 3 , Na[Al(OH) 4 ] , Na 2 O·Al 2 ...
GaN crystals can be grown from a molten Na/Ga melt held under 100 atmospheres of pressure of N 2 at 750 °C. As Ga will not react with N 2 below 1000 °C, the powder must be made from something more reactive, usually in one of the following ways: 2 Ga + 2 NH 3 → 2 GaN + 3 H 2 [61] Ga 2 O 3 + 2 NH 3 → 2 GaN + 3 H 2 O [62]
4 NaNH 2 + 5 O 2 → 4 NaOH + 4 NO + 2 H 2 O 4 NaNH 2 + 7 O 2 → 4 NaOH + 4 NO 2 + 2 H 2 O. In the presence of limited quantities of air and moisture, such as in a poorly closed container, explosive mixtures of peroxides may form. [28] This is accompanied by a yellowing or browning of the solid.
3-Nitroaniline is an organic compound with the formula H 2 NC 6 H 4 NO 2. A yellow solid, it is a derivative of aniline, carrying a nitro functional group in position 3. It is an isomer of 2-nitroaniline and 4-nitroaniline. It is used as a precursor to dyes. [1]
α,β-Unsaturated carbonyl compounds featuring a carbonyl conjugated to an alkene that is terminal, or vinylic, contain the acryloyl group (H 2 C=CH−C(=O)−); it is the acyl group derived from acrylic acid. The preferred IUPAC name for the group is prop-2-enoyl, and it is also known as acrylyl or simply (and incorrectly) as acryl. Compounds ...
Currently Tô Lịch River begins in Nghĩa Đô ward, Cầu Giấy District (south of the Hoàng Quốc Việt road), running the same direction as the Bưởi, Láng and Kim Giang road to the south, southwest and then turns to the southeast and flows to Nhuệ River (opposite the village of Hữu Từ, Vĩnh Quỳnh, Thanh Trì).