Sulphamate salts

Both compounds are soluble in water and are readily hydrolysed to sulphamic acid, HjN S03" andammonia the hydrogen atoms are in each case replaceable by metals to form salts. Many derivatives of sulphamide and cyclic derivatives of sulphimide are known. 

Numerous new salts and additive compounds of cinchona alkaloids, and especially of quinine, have been described, of which only a few can be mentioned as examples quinine additive compounds with sulph-anilamide, t quinine salts of (+) and (—)-pantothenic acid, °( > quinine sulphamate and disulphamate, °( organo-mercury compounds of quinine and cinchonine such as quinine-monomercuric chloride. Various salts and combinations of quinine have also been protected by patent, e.g., ascorbates and nicotinates. 

Deposits from other solutions Nickel can be deposited from solutions based on salts other than the sulphate, chloride and sulphamate. Solutions based on nickel fluoborate, pyrophosphate, citrate, etc. have been extensively studied but none of them is used to any significant extent in Europe for engineering deposits. 

A review of earlier results is included in a paper by Kiyoura and Urano [946] on the decompositions of (NH4)2S04 (413—513 K) and NH4HS04 (433-473 K). The intermediate formation at 433 K of the double salt (NH4)3H(S04)2 was detected by X-ray diffraction and this salt decomposed to NH4HS04 at 453 K. Decomposition of the ammonium hydrogen sulphate at 473 K proceeded through the formation of molten sulphamic acid... 

The situation does not improve with mixtures with the hydrides of the elements. Thus, a detonation occurred during contact between water and chlorine due to an accidental spark. Phosphine, silane and diborane all combust spontaneously in chlorine (their behaviour is the same in oxygen). With hydrogenated nitrogenous compounds ammonia, hydrazine, hydroxylamine, ammonium salts (especially ammonium chloride), and also sulphamic acid (these last two in an acid medium) there is ignition or even detonation. 

A method for the preparation of cyclonite from sulphamic acid, formaldehyde and nitric acid was developed in 1934 by Wolfram [38], It is known as the W-meth-od and the cyclonite so obtained is known as W-Salz . The W-method is based on the condensation of the potassium salt of sulphamic acid with formaldehyde and the nitration of the condensation product ( white salt , a Schiff s base of the type XVIII) with nitric acid. 

The ammonia evolved in reaction (c) during the preparation of calcium sulpha-mate is recycled to take part in reactions (a) and (b). Since calcium sulphamate dissolves fairly easily, it is transformed into the sparingly soluble potassium salt by reaction (d). 

SYNS AMCIDE O AMICIDE AMMAT AMMATE AMMONIUM AMIDOSULFONATE AMMONIUM AMIDOSULPHATE AMMONIUM-SALZ der AMIDOSULFONSAEURE (GERMAN) AMMONIUM SULPHAMATE AMS IKURIN MONOAMMONIUM SULFAMATE SULFAMATE SULFAMIC ACID, MONOAMMONIUM SALT SULFAMINSAEURE (GERMAN)... 

SYNS CALCIUM CYCLAMATE CALCIUM CYCLO-HEXANESULFAMATE CALCIUM CYCLOHEXANE SULPHAMATE CALCIUM CYCLOHEXYLSULFAMATE CYCLAMATE CALCIUM CYCLAMATE, CALCIUM SALT CYCLAN CYCLOHEXANESULFAMIC ACID, CALCIUM SALT CYCLOHEXYLSULPHAMIC ACID, CALCIUM SALT CYLAN DIETIL KALZIUMZY-KLAMATE (GERMAN) SUCARYL CALCIUM... 

The structure of the aminosulphonate (sulphamate) ion, SO3NH2, has been accurately determined in the K salt, (i). Since the angles S—N-H and H—N—H are both 110° the N bonds are not coplanar, as suggested by an earlier X-ray study. We may include here two zwitterions. A n.d. study of sulphamic acid, 038. NH3, shows that the molecule has approximately the staggered configuration, (n). Of special interest are the N-H—O bonds (2-93-2-98 A) in which the N—H bond... 

In NaHPOa(NH2) there are zwitterions H3N.PO3 , (d), analogous to the isoelectronic sulphamic acid, (e), H3N. SOJ (p. 586). The N-H-0 bonds link the ions into a 3-dimensional framework, in the interstices of which are located the Na ions. Replacement of one 0 by S in PO3NH2" gives the ion [P02S(NH2)] in which the bond lengths shown at (f) come from a study of the di-ammonium salt. There are similar bond lengths in the diamidothiophosphate ion, studied in NH4 [P0S(NH2)2]. ... 

The kinetics of formation of sulphamic acid (1) from urea (27) and fuming sulphuric acid (equation 2) at 50 °C-70 °C and the rate constant was found to be proportional to the excess concentration of S0358. Formation of the salt [(H2N)2COH] +[HS207] (28) takes place and its decomposition occurs in the slow step. 

Hydrazinium sulphamate, NH2N + H3-S03NH2 (44) and several other hydrazinium salts have been prepared by the reaction between the appropriate ammonium salts and hydrazinium hydrate85. The thermal behaviour of the sulphamates and the other salts has been investigated. 

The heterocyclic sulphamate 86 has been synthesized96. The sulphamates 87-92 were synthesized to help probe and extend the existing taste relationships in this field98. The mono- and di- sodium salts of antipyrine sulphamate (93) have been prepared by the reduction of nitrosopyrine with a sulphite-bisulphite mixture112. 

The non-nutritive sweetening properties of the salts of certain aliphatic and alicyclic sulphamic acids are well known. DuBois235 considered that the sulphamic acid salt (215) of the dihydrochalcone (216) should be sweet. Known sulphamation methods of 217... 

Phosphoramidic acid is somewhat stronger than phosphorodiamidic acid (Table 5.24). If phosphoramidic acid is heated for several hours at 100°C, it isomerises to a very soluble ammonium polyphosphate, by a process which is probably connected with zwitterion formation (7.59). If carbon dioxide is passed into a solution of Na2P03NH2, the relatively insoluble monosodium salt is obtained, which contains the zwitterion (7.60a). Isoelectronic sulphamic acid (7.60b) also exists as a zwitterion [9]. 

The standard method for the determination of nitrite in seawater is based on the reaction of nitrite with an aromatic amine leading to the formation of a diazonium compound which couples with a second aromatic amine. The product is an azo dye which is quantified by spectrophotometry. Early methods were modifications of the Griess-Ilosvay procedure where the nitrite diazotized with sulphamic acid. The diazonium salt then coupled with 1-naphthylamine. The method described below is generally accepted for seawater analysis and is based on the method proposed by Shinn (1941) and adapted for seawater by Bendschnei-der and Robinson (1952). This method is very sensitive and is unaffected by the presence of other constituents normally occurring in seawater. Sulphanilamide hydrochloride is used as the amino compound, which after diazotization is coupled with N-(l-naphthyl)-ethylene-diamine dihydrochloride. 

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