Jochen Jander

Untersuchungen an Stickstoff-Brom-Verbindungen, IV / Studies on Nitrogen-Bromine Compounds, IV

The crystal and molecular structures of N-bromobenzamide (NBB), N-bromosuccinimide (NBS), and N,N-dibromobenzenesulfonamide (NBBS) were determined by X-ray structure analysis. The nitrogen atoms in NBB and NBS have a trigonal planar coordination (sp2) and the N—Br distances lie in the same range (1.82 A, 1.84 A). The N—Br distance in NBBS, where the nitrogen atom is sp3-hybridized, is somewhat longer (1.88 A). In these structures the molecules are connected by O···H—N (NBB), O···Br—N (NBS) or N···Br—N (NBBS) intermolecular bonds forming endless chains; positivated hydrogen atoms or, in case that they are absent, positivated bromine atoms act as electron acceptors with oxygen or sp3- hybridized nitrogen atoms. These results suggest, that in solid nitrogen tribromide, the crystal structure of which cannot be determined, the nitrogen atoms will be sp3-hybridized and intermolecular contacts via N—Br···N will occur.

N-Brom-N-chlorsulfonamide. Herstellung und Reaktionen mit Phenylmetallverbindungen/N-Bromo-N-chlorosulfonamides. Preparation and Reactions with Phenylmetallics

Abstract The preparation of CH3SO2NBrCl and p-CH3C6H4NBrCl is described. These compounds react with (C6H5)4Sn, (C6H5)4Pb, and (C6H5)2Hg to give derivatives CH3SO2N(C1)M(C6H5)n-1. In these reactions one phenyl group is cleaved from the metal.

Fluorierung von Platin(IV)amminkomplexen in wäßriger Lösung / Fluorination of Ammine Complexes of Platinum(IV) in Aqueous Solution

Abstract Unlike chlorination fluorination of ammine complexes of platinum(IV) in aqueous solution does not lead to haloamido complexes. Instead, the triammine complexes [Pt(NH3)3Cl3]Cl and [Pt(NH3)3(NCl2)2Cl]Cl yield no definite main product, and the tetrammine and pentammine complexes trans-[Pt(NH3)4Cl2]Cl2, [Pt(NH3)4(NCl2)Cl]Cl2, [Pt(NH3)5Cl]Cl3, and [Pt(NH3)5(OH)]Cl3 form the sparingly soluble complex trans -[Pt (NH3)4Cl2](H2F3)2 · 2H2O as the main product.

Untersuchungen an Stickstoff-Iod-Verbindungen, XVII [1]. Weitere tertiäre N-Basen als Stabilisatoren des Iodonium-Kations und der Iodhalogenide / Studies on Nitrogen-Iodine Compounds, XVII [1]. Further Tertiary N-Bases as Stabilizers of the Iodonium Cation and Iodine Halides

Abstract The preparation and properties of the new compounds [I(2,4 lutidine)2]NO3, -ClO4, [I(2,6 lutidine)2]NO3, -ClO4, [I(2,4,6 collidine)2]NO3, -ClO4, [I(TEDA)2]NO3, [I(quinu-clidine)2]SbCl6, quinuclidine · IBr, quinuclidine · ICl, quinuclidine · IClSbCl5, TEDA · I2, I2 · TEDA · I2, and ClI · TEDA · ICl are reported. The molecular vibrations and force constants are compared to those of similar compounds previously prepared.

Notizen: Darstellung und Isolierung von Stickstofftribromid NBr3 und Stickstoffdibromidmonojodid NBr2J / Preparation and Isolation of Nitrogentribromide NBr3 and Nitrogendibromidemonoiodide NBr2I

Nitrogen tribromide was prepared andisolated in a pure state. Its analysis and molecular spectra are reported briefly. Reactions with ammonia, tertiary organic Nbases, and iodine give monobromamine, molecular addition compounds between Nbaseand bromine, and nitrogendibromidemonoiodide,respectively.

Reaktion von Arsen-Sauerstoff-Verbindungen mit überkritischem Ammoniak Kristalldaten von Ammoniummetaarsenit NH4AsO2 / Reaction between Arsenic-Oxygen-Compounds and Ammonia above the Critical Point Crystal Data of Ammoniummetaarsenite NH4AsO2

The reactions between As2O3, As2O5, As(OC2H5)3, and NH3 above the critical point up to 3700 atm were investigated and described. The reaction products formed under various pressure and temperature conditions are compounds with arsenic-nitrogen bondings and ammonium salts of different arsenic acids. The lattice constants and the space group of NH4AsO2 produced by the reaction of As2O5 and NH3 under ammonothermal conditions were determined.

Coordination Problems of Nitrogen-Iodine-Compounds in Liquid Ammonia

By the reaction of iodine and small amounts of liquid ammonia at 75° a black brown solid is formed. A tensimetric deammonation shows that this solid is an addition compound of iodine and ammonia with 2 moles of ammonia per mole of iodine. Further deammonation effects formation of a com — pound I2. NH3; finally, I2 remains. Ammonolysis of iodine takes place only to a small extent. These brown addition compounds of iodine correspond to the well known brown addition compounds of iodine and ether, alcohol, pyridine or liquid hydrogen sulfide respectively and are looked upon as charge transfer complexes with iodine as electron acceptor and the solvents as electron donors. This view was proved by the measurement of the charge transfer band of iodine-ammonia in heptane at 229 mµ (2).