Dihydrogen borate

Dihydrogen borato) phenylmercury. See Phenylmercuric borate Dihydrogen (ethyl) [4-[4-[ethyl (3-sulfonatobenzyl) amino] (4-hydroxy-2-sulfonatobenzhydrylidene] cyclohexa-2,5-dien-1-ylidene] (3-sulfonatobenzyl) ammonium, disodium salt. See Fast green FCF Dihydrogen hexachloroplatinate Dihydrogen hexachloroplatinate (2-). See Chloroplatinic acid... 

Figure 42. Breakdown voltages for A1 anodized in (1) ammonium borate, (2) ammonium adipate, (3) potassium hydrogen phthalate, and (4) ammonium dihydrogen phosphate.285...

Currently used nonlinear optical crystals are potassium dihydrogen phosphate (KDP) and barium borate (BBO). Compared to KDP, the advantages of BBO are its transparency in the UV and its larger quantum efficiency of up-conversion by a factor of 4—6. For a given position of the crystal, only a narrow band of the fluorescence spectrum is up-converted. Therefore, if the full fluorescence spectrum is of interest, the crystal must be rotated at a series of angles. An example of experimental set-up is presented in Figure 11.2. The fwhm of the response is 210 fs. 

Solution A is a 0.1 molar soln of potassium dihydrogen phosphate, prepd by dissolving 13.61 g of ACS grade material in distd w and diluting to 1 liter Solution B is a 0.05 molar soln of sodium borate (borax) prepd by dissolving 19.10 g of ACS grade material in distd w and diluting to 1 liter... 

The 1,2-dehydro ketone 4 can be reduced selectively directly to 2, but in this case a proton source is necessary to decompose an intermediate enol borate formed by 1,4-addition of hydride. Potassium dihydrogen phosphate serves this purpose and also functions as a buffer. 

Polymicro Technologies uncoated fused-silica capillary 75 cm x 75 pm Distance to detector 50 cm 0.05 M sodium deoxycholate, 0.01 M potassium dihydrogen-orthophosphate, 0.01 M sodium borate, pH 8.6 20 kV 27°C Commercial low joule soft drinks, cordials, tomato sauce, marmalade jam, powder sweeteners (Internal standard dehydroacetic acid) 220 nm 80... 

Valence-bond structural formulas for the dihydrogen borate ion, [BO(OH)2]-, and its measured dimensions in... 

Boric acid is a feeble acid. (It is so weak that its solution is used to bathe infected eyes.) How strong a base is its conjugate—the dihydrogen borate ion, H2BO3 ... 

Figure 19.1 Basicity of Sodium Dihydrogen Borate Solution...

Disodium hydrogen phthalate-sodium dihydrogen orthophosphate Dipotassium hydrogen phthalate-potassium dihydrogen orthophosphate Potassium dihydrogen orthophosphate-sodium hydroxide Borate buffer, phosphate buffer... 

Pac AS3 anion exchanger (Fig. 3-49), a mixture of sodium carbonate and sodium dihydrogen borate is used as the eluent. A small quantity of ethylenediamine is also added to the mobile phase to allow for the complexation of traces of heavy metal ions, which could be present in the eluent [56,57], While the detection of these two anions is very easy, the interpretation of experimental results for the investigation of real-world samples is very difficult. These samples normally contain transition and heavy metal ions, in the presence of which sulfide and cyanide are not present or only partly present as free ions. However, only the free ions are detected under the chromatographic conditions listed in Fig. 3-49. 

J. Eckert, A. Albinati, U.E. Bucher L.M. Venanzi (1996). Inorg. Chem., 35, 1292-1294. Nature of the Rh-H2 bond in a dihydrogen complex stabilized only by nitrogen donors. Inelastic neutron scattering study of [TpMe2RhH2 (TI2-H2)] (TpMe2 = Hydrotris(3,5-dimethyIpyrazolyl)borate). 

Tris(pyrazolyl)borates have been reported also in two chapters on B-H120 and X-H121 activation (X = Si, Ge, Sn) in the book Metal Dihydrogen and o-Bond Complexes, edited by Kubas. 

Preparation and reactivity with azo-species of hydride and dihydrogen complexes of osmium stabilised by tris(pyrazolyl)borate and phosphite ligands... 

Gatling and Jackson have shown how dihydrogen bonding to an OH group of a hydroxyketone can direct the attack of borohydride to one face of the molecule indeed, the product is 99.7% trans (Equation 9). The effect was suppressed by addition of F , a species that disrupts the hydrogen bonding. Under the conditions used, formation of an intermediate borate ester can be excluded. 

In compound 1.10 [40g], both independent urea molecules and the BO(OH)2 ion (dihydrogen borate, hereafter abbreviated as DHOB) in the asymmetric unit occupy special positions of symmetry m such that only the C-0 or B-0 double... 

Y-shaped junction built from urea ribbons and dihydrogen borate ribbon... 

It is of interest to note that the allophanate ion, which is known in the form of its derivatives, and the dihydrogen borate anion BO(OH)2, the fugitive conjugate base of boric acid, can be generated in situ and stabilized in the crystalline state through... 

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