Nitrilo

The bivalent radical —NH— linked to two identical radicals can be denoted by the prefix imino-, as well as when it forms a bridge between two carbon ring atoms. A trivalent nitrogen atom linked to three identical radicals is denoted by the prefix nitrilo-. Thus ethylenediaminetetraacetic acid (an allowed exception) should be named ethylenedinitrilotetraacetic acid. 

Organic compound (such as ethylenediamine-tetraacetic acid (EDTA) or nitrilo-triacetic acid (NTA) having the ability to take metal ions in water and produce soluble, coordinate-bond complexes. Chelants are commonly used in BW deposit control treatments and various cleaning formulations. 

Acetic acid, ethylenenitrilo[(hydroxyethyl)nitrilo]tri-iron(III) complexes, 2,788 Acetic acid, hexamethylenediaminetetra-synthesis, 2,779 Acetic acid, iminodi-chelating resins mineral processing, 6,824 metal complexes, 1,554 2, 788... 

Figure 5-4. 2-Bromo-2-bromomethylglutaronitrile, 2,2-dibromo-3-nitrilo-propionamide, 1,2-dimethyl-5-nitro-1 H-imidazole, 4,4-dimethyl-2-oxazo-lidinone, dimethylaminopropyl acrylamide, dimethylaminopropyl methacrylamide, or dimethylaminopropyl acrylamide, 5,5-dimethylhydantoin, dimethylurea.

Small amounts of pyridine bases increase the corrosion resistance of cement stone without any associated loss of strength [1016]. The use of nitrilo-trimethyl phosphonic acid and an adduct between hexamethylene tetramine and chlorinated propene or butene improves the adhesion to the metal, hardening times, mobility, and strength [ 1770]. The latter adducts are further claimed to be useful as additives in cementing oil and gas wells in salt-bearing strata [1768]. 

Nitrilo-Trimethyl Phosphonic Acid Hydrazine Hydrochloride... 

A corrosion-resistant formulation [1767] is achieved by adding phosphonic acid and hydrazine hydrochloride, as shown in Table 18-3. Hydrazine hydrochloride, combined with nitrilo-trimethyl phosphonic acid, provides a synergetic effect of increased inhibition of the plugging solution. 

Plugging Portland cement Nitrilo-trimethyl phosphonic acid Hydrazine hydrochloride Water 73.20-73.38 0.02-0.04 0.18-0.32 up to 100... 

Small amounts of phosphonium complexone [1560] are sufficient to increase adhesion to the stratal rock. Table 18-4 illustrates an example for plugging solution with Portland cement and phosphonium complexone. Calcium chloride acts as a regulator of the setting time in the suggested composition. More precisely, phosphonium complexone stands for certain chelating phosphorous compounds (e.g., oxyethylidene diphosphonic acid, nitrilo-trimethyl phosphonic acid, sodium tripolyphosphate, or amiphol) [1540]. The mixture is applicable at low temperatures from 20° to 75° C. 

Hemi-hydrated gypsum Waste obtained in production of nitrilo-trimethyl phosphonic acid [1594]... 

P. F. Tsytsymushkin, S. R. Khajrullin, A. P. Tamavskij, P. V. Kovalenko, Z. N. Kudryashova, R. M. Iskhakov, V. N. Levshin, and V. M. Sudakov. Plugging solution for oil and gas wells—contains plugging Portland cement, nitrilo-trimethyl phosphonic acid, hydrazine hydrochloride and water and has corrosion-protective properties. Patent RU 2(X)2037-C,... 

Umemura, T., Sai, K., Takagi, A., Hasegawa, R. and Kurokawa, Y. (1991). The effects of exogenous glutathione and cysteine on oxidative stress induced by ferric nitrilo-triacetate. Cancer Lett. 58, 49-56. 

The detergent industry hoped that this story would be repeated. It spent a lot of money on research and found a partial substitute for the phosphate, sodium nitrilo-triacetate (NTA). The chemical industry began to build plants for its production. Monsanto, which had built a plant to produce 75,000,000 lb / yr (35,000,000 kg / yr), planned to double that plant s capacity and to add another one to produce... 

An ionophoretic method was described by Tewari [41] for the study of equilibria in a mixed ligand complex system in solution. This method is based on the movement of a spot of metal ion in an electric field with the complexants added in the background electrolyte at pH 8.5. The concentration of the primary ligand (nitrilo-triacetate) was kept constant, while that of the secondary ligand (penicillamine) was varied. The stability constants of the metal nitrilotriacetate-penicillamine complexes have been found to be 6.26 0.09 and 6.68 0.13 (log K values) for the Al(III) and Th(IV) complexes, respectively, at 35 °C and an ionic strength of 0.1 M. 

The preparation of thiadiazoles 180 from 1-cyanoformamide 177 (2-nitrilo-acetimidic acid), or its alkyl esters 178, using disulfur dichloride under mild conditions was previously reviewed in CHEC(1984) and CHEC-II(1996). The synthesis of thiadiazoles from the thioesters 179, formed by the addition of alkylthiols to cyanogens, was more recently investigated (Equation 36) <1998JME379>. In several cases, the esters 178 or thioesters 179 prepared from cyanogen were not isolated but added directly to disulfur dichloride <1996W038431, 1998JME379>. 

O is senior to N the direction of bonding in unsymmetrical nitrilo subunits, =N- or -N=, is indicated by the endings of the names of the adjacent subunits in the CRU Rule... 

El6 catena-poly[(diethoxophosphorus)-p-nitrido] [4] poly[nitrilo(diethoxy-X -phosphanylylidene)] [2] poly(diethoxyphosphazene)... 

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