Hydroxy-, hydrates

HPAB Hanssons Pyrotekniska Hx hydroxy hydrated, hydrolysis... 

Beilstein Handbook Reference) Benzazimidol hydrate IH-Benzotriazole, 1-hydroxy- IH-Benzotriazole, 1-hydroxy-, hydrate BRN 0004515 CCRIS 2605 EINECS 219-989-7 HOBt 1-Hydroxybenzotriazole l-Hydroxybenzotriazole hydrate 1-Hydroxy-IH-benzotriazole hydrate N-Hydroxy-benzotriazole hydrate. Widely used additive to decrease racemization during dicyclohexylcarbodiimide-catalyzed peptide coupling. Crystals mp = 157-158°, Janssen Chimica Lancaster Syrrthesis Co. Sigma-Aldrich Fine Chem. 

Hawthorne FC, Schindler MS (2000) Topological enumeration of decorated [Cu ( )2]n sheets in hydroxy-hydrated copper-oxysalt minerals. Can Mineral 38 751-761 Hawthorne FC, Sokolova EV (2002) Simonkolleite, Zn5(0H)gCl2(H20), a decorated interrapted-sheet stracture of the form [M 2 a- Can Mineral (submitted)... 

Schindler M, Hawthorne FC (2001c) A bond-valence approach to the structrrre, chemistry and paragenesis of hydroxy-hydrated oxysalt minerals III. Paragenesis of borate minerals. CanMinerk 39 1257-1274... 

As with permanganate oxidations, a-hydroxy ketones can be formed as side products. In some cases, structural features make the osmium complex relatively unstable, and in an aqueous medium it can react with water to give a hydroxy-hydrate, which is then converted to an a-keto alcohol. Sharpless et al. developed a procedure that used tert-butyl hydroperoxide with a catalytic amount of osmium tetroxide,367 in the presence of tetraethylammonium hydroxide (EtqN" " OH ). The procedure gave improved yields of the cis-diol and a little a-hydroxyketone, as shown in the conversion of oct-(4 )-ene to a mixture of 258 and 259 in 73% yield. This method is more reliable for oxidation of tri- and tetrasubstituted alkenes than the Upjohn procedure. The reaction was not suitable for base sensitive alkenes, but later work showed that changing the solvent to acetone allowed the use of tetraethylammonium acetate (Et4NOAc) 68 for the hydroxylation of sensitive alkenes such as ethyl crotonate. 

Hydroxybenzopyridine. See 8-Hydroxyquinoline 1 -Hydroxybenzotri azole CAS 2592-95-2 EINECS/ELINCS 219-989-7 Synonyms Benzazimidol hydrate 1H-Benzotriazole, 1-hydroxy-, hydrate 1-Hydroxy-1H-benzotriazole hydrate N-Hydroxybenzotriazole hydrate Classification Aromatic heterocyclic Empirical CeHsNsO H2O Properties M.w. 135.14 m.p. 156-158 C Toxicology LDLo (oral, rat) 5 g/kg low toxicity by ing. primary eye irritant TSCA listed Precaution Potentially explosive (heated above 160 C)... 

Fig. 5 Polyhedron representation of the uranyl-oxide hydroxy-hydrate sheet in schoepite, [(U02)g02(0H)i2](H20)i2, showing polyhedron chains parallel to [1 0 0], [0 1 0], [1 2 0], [110] and [2 10], respectively equatorial 0 anions of the uranyl-polyhedra are shown as orangelgray circles, equatorial edges are shown as heavy black lines from [31]...

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