1,5-Naphthalenedisulfonate

Naphthalenediol. 1,5-Dihydroxynaphthalene or Asurol is a colorless material which darkens on exposure to air. It is manufactured by the fusion of disodium 1,5-naphthalenedisulfonate with sodium hydroxide at ca 320°C in high yield. 1,5-Naphthalenediol is an important coupling component, giving ortho-a2o dyes which form complexes with chromium. The metallised dyes produce fast black shades on wool. 1,5-Naphthalenediol can be aminated with ammonia under pressure to 1,5-naphthalenediamine. 

Figure 14. Hydration free energies -ACjUi at 293 K for reaction A (H20)n-1 + H2O = A2-(H20) versus n for several doubly charged acid anions as indicated for each plot. Hydration strength increases in the order 1,5-naphthalenedisulfonate to SOi. From Blades, A. T. Klassen, J. S. Kebarle, P. ]. Am. Chem. Soc. 1995, 117, 10563, with permission.

Chemical Name 2-[2-(Acetyloxy)-l-oxopropoxy]-N,N,N-trimethylethan-aminium 1,5-naphthalenedisulfonate (2 1)... 

Crystal structures of [Co(trien)(phen)Kl,5nds),5(phen)2(H20)g (1) and [Co(en)2(phen)J (l,5nds)i5(H20), (2) (l,5nds = 1,5-naphthalenedisulfonate) illustrate that porous crystalline materials which can intercalate large organic molecules can be constructed using complex cations and bulky organic counter anions. 

Compound 1 c/5-[Co(trien)Cl2]Cl, phen and 1,5-naphthalenedisulfonate sodium salt were mixed in aqueous (molar ratio 1 1.5 1.5) solution, which was stirred and warmed at 50°C for 2 hours. The resulting solution was kept at room temperature and crystals suitable for x-ray analysis were obtained after a few days. Compound 2 was obtained using the same procedure as that of 1, except that c/s-[Co(en)2Cl2lCl was used instead of cis-[Co(trien)Cl2]Cl. 

Somewhat surprisingly, intercalation reactions of certain layered double hydroxides show shape selectivity. For example, a strong preference for 1,5-naphthalenedisulfonate over 2,6-naphthalenedisulfonate is found on intercalation of an equimolar mixture into [EiAl2(0H)6]Cl H20 at 100 °C. Perhaps even more remarkably, the rate of intercalation into [Mgo.7Alo.3(OH)2](Cl)o.3nH20 of L-histidine was shown to... 

Very often, the replacement of a diazonium group by hydrogen is carried out using stable crystalline diazonium salts, such as the 1,5-naphthalenedisulfonates, "" 2-naphthol-l-sulfonates, "" tetrafluorobor-ates, " " """ hexafluorophosphates " and mercury bromides. ... 

Napadisylate (1,5-naphthalenedisulfonate)3 Xinafoate (1 -hydroxy-2-naphthalenecarbox-ylate)... 

Figure 35. The structure of UFUQUH [La2(OH)2(CioH6S206)(H20)2]. Tetrahedra are bridging (point-shared) sulfonate groups of the 1,5-naphthalenedisulfonate linkers.

Naphthalenedisulfonate salt, C HjgNjO j, Diazoline, Fabahistin, Omeril. White powder, dec 280°. Practically insol in water. Sparingly sol in hot glacial acetic acid. Sol in hot formamide, giving a yellow soln. One of the active ingredients of Refagan. 

Naphthalenedisulfonate, C HjjN-OtSj, phencarb-amide napadisilate, Geiosedine. LDM orally in rats 920... 

Thiamine 1,5-Salt, Aneurin-1,5-salt thiamine chloride naphthalene-l,S-di ulfonic acid salt. can,. 0,S3. Prepd as [Cl Hi,N4OSP+.C10H6(SOj-) ,H,O, by mix-ing a 10% aq soln of thiamine chloride hydrochloride with a 10% aq soln of 1,5-naphthalenedisulfonic acid, cooling the mixture and recovering the cryst product Westphal et al. 

Fast Red B 2-methoxy-4-mtrobenzenediazonium 1,5-naphthalenedisulfonate Fast Red ITR 5-diethylaminosulfonyl-2-methoxybenezenediazonium chloride Fast Red PDC 5-butylaminosulfonyl-2-methoxybenezenediazomum chloride 1 -NA 1-naphthylamine DMNA N,N -dimethyl-1 -naphthylamine. 

Although Barcelo et al. [129] focused on the performance of solid phase extraction materials, the analyte base of 22 aromatic sulfonates (e.g., benzenesul-fonate, 2-amino-1,5-naphthalenedisulfonate, 1,3-benzenedisulfonate, l-hydroxy-6-amino-3-naphthalenesulfonate, 2-napthalenesulfonate, diphenylamine-4-sulfonate) is extensive. Separation is achieved on a Cjg column using a complex 30-min 100/0 25/75 water (5mM triethylamine with 5mM acetic acid to pH 6.5)/... 

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