Nitrogen trioxide, complexes

Nitrosyl chloride [55], nitrosyl fluoride-hydrogen fluoride liquid complexes (NOF3HF, NOF 6HF) [56], nitrous acid-hydrogen fluoride solutions [57, 5 ] nitrogen trioxide (prepared in situ from nitric oxide and oxygen) [59] and rert-butyl nitrite-hydrogen fluoride-pyndine [60] have been substituted for sodium nitrite in the diazotization step... 

Nitrous acid is also employed as a nitrating agent in organic chemistry. Thus, M. F. Aitken and T. H. Reade studied its action on p-iododimethylaniline, and obtained nitro-derivatives J. Reilly and P. J. Drumm, its action on substituted p-phenylenediamines and F. Bettzieche, and R. H. A. Plimmer, its action on amides and other amino-compounds. Nitrogen trioxide was found by H. Reihlen and A, Hake to form att unstable complex with stannic chloride—possibly 38nCl4.4N02. Nitrogen trioxide reacts with stannic chloride not in the ordinary blue but in the colourless form. A. Klemenc and R. Scholler studied the partition of nitrous acid between ether and water. The poisonous qualities of nitrous acid have been discussed by A. Purcell,3 etc. 

Nitrogen trioxide combines with boron trifluoride to form a complex salt, the structure of which, as assumed by G. B. Bachman and Hokama [104], should... 

Tellurium Halides. Tellurium forms the dihalides TeCl and TeBi, but not Tel2. However, it forms tetrahalides with all four halogens. Tellurium decafluoride [53214-07-6] and hexafluoride can also be prepared. No monohalide, Te2X2, is believed to exist. Tellurium does not form well-defined oxyhalides as do sulfur and selenium. The tellurium halides show varying tendencies to form complexes and addition compounds with nitrogen compounds such as ammonia, pyridine, simple and substituted thioureas and anilines, and ethylenediamine, as well as sulfur trioxide and the chlorides of other elements. 

As would be expected from a substance of this nature, water causes rapid decomposition into sulphuric acid and the decomposition products of nitrous acid, whilst sulphuric acid dissolves the substance with formation of nitrosulphonic acid, which crystallises on cooling. With sulphur trioxide the anhydride yields a stable complex of composition 2(S2N209).S03.1 Gaseous ammonia causes the anhydride to melt and decompose slowly with formation of nitrogen and ammonium hydrogen sulphate ... 

Selenium trioxide shows the typical properties of a Lewis acid and forms 1 1 complexes with organic bases such as pyridine, y-picoline, quinoline, morpholine, and triethylamine in liquid SO2 or nitromethane. The complexes were found to be of donor-acceptor type, and IR spectroscopy suggests that selenium is coordinated via the nitrogen atom of the tertiary base. It has also been confirmed that the tetrameric ring of SeOs is retained in the adducts. 

The methyne proton of tris(pyrazolyl)methane is sufficiently acidic to be removed by raBuLi, and the resulting reactive intermediate readily reacts with electrophiles. Klaui prepared two new anionic tripodal nitrogen water-soluble ligands (the lithium salts of tris(pyrazolyl)- and tris(3-tert-butylpyrazol)-methanesulfonic, Tpms and Tmps B" respectively) by addition of lithiated tris(pyr-azolyl)methane to a sulfur trioxide-trimethylamine complex (Scheme 25).146... 

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