Search results
Results From The WOW.Com Content Network
Sodium triacetoxyborohydride, also known as sodium triacetoxyhydroborate, commonly abbreviated STAB, is a chemical compound with the formula Na[(CH 3 COO) 3 BH]. Like other borohydrides, it is used as a reducing agent in organic synthesis. This colourless salt is prepared by protonolysis of sodium borohydride with acetic acid: [1]
Ball-and-stick model of the tetrahydroborate anion, [BH 4] −. Borohydride refers to the anion [B H 4] −, which is also called tetrahydridoborate, and its salts. [1] Borohydride or hydroborate is also the term used for compounds containing [BH 4−n X n] −, where n is an integer from 0 to 3, for example cyanoborohydride or cyanotrihydroborate [BH 3 (CN)] − and triethylborohydride or ...
Download QR code; Print/export Download as PDF; Printable version; In other projects ... sodium-18: 1.34 lithium-10m2: 1.35 lithium-10: 2.0 beryllium-13: 2.7 helium-7:
X-ray spectrometer developed by W. H. Bragg. In 1913 the structure of sodium chloride was determined by William Henry Bragg and his son William Lawrence Bragg. [2] [3] [4] This revealed that there were six equidistant nearest-neighbours for each atom, demonstrating that the constituents were not arranged in molecules or finite aggregates, but instead as a network with long-range crystalline ...
The first step of the synthesis involves treatment of bisphenol A with sodium hydroxide, which deprotonates the hydroxyl groups of the bisphenol A. [6] (HOC 6 H 4) 2 CMe 2 + 2 NaOH → Na 2 (OC 6 H 4) 2 CMe 2 + 2 H 2 O. The diphenoxide (Na 2 (OC 6 H 4) 2 CMe 2) reacts with phosgene to give a chloroformate, which subsequently is attacked by ...
Tetrakis(triphenylphosphine)palladium(0) was first prepared by Lamberto Malatesta et al. in the 1950s by reduction of sodium chloropalladate with hydrazine in the presence of the phosphine. [4] It is commercially available, but can be prepared in two steps from Pd(II) precursors: PdCl 2 + 2 PPh 3 → PdCl 2 (PPh 3) 2
Data table: electronegativities of the elements Number Symbol Name electronegativity WEL CRC LNG; 1: H: hydrogen: 2.20: same 2: He: helium: no data: same 3: Li ...
Sodium ratio refers to the amount of sodium per amount of food eaten, usually in grams per kilocalorie, or milligrams per kilocalorie. Dietary potassium can be measured as the total amount of potassium in the diet (usually in milligrams). It can also be measured in relation to sodium intake as the potassium-sodium ratio, in mg K/mg Na, or mg K ...