Dass Hydrierprodukt eines β-Nitro-N-nitrosoamins ist kein 1,2,3-Triazolidin,sondern ein β-Hydroxylamino-N-nitrosoamin

The Product of Hydrogenation of a β-Nitro-N-nitrosoamine Is Not a 1,2,3-Triazolidine, but a β-Hydroxylamino-N-nitrosoamine It is shown, by spectroscopy, that the product of catalytic hydrogenation of N, 2-dimethyl-2-nitro-N-nitrosopropylamine (1) consists of a 5:1 mixture of (E)- and (Z)-2-hydroxylamino-N, 2-dimethyl-N-nitrosopropylarnine (3) and does not contain - as had been claimed - any l, 2-dihydroxy-1, 2, 3-triazolidine (2). Thus there is still no evidence for the existence of the N(OH)N(OH) functionality. The structure of intermediates on the way to 1 are also revised.     

Darstellung und Kristallstruktur eines Ditelluridovanadium(IV)‐Komplexes: [(μ‐η1‐Te2)(μ‐NtBu)2V2Cp2]

Synthesis and Crystal Structure of a Ditelluridovanadium(IV) Complex: [(μ‐η¹‐Te₂)(μ‐N^tBu)₂V₂Cp₂] [(μ‐η¹‐Te₂)(μ‐N^tBu)₂V₂Cp₂] ( 2 ) is formed from [^tBuN = VCp(PMe₃)₂] ( 1 ) upon reaction with elemental tellurium. 1 and 2 are characterized by spectroscopic methods (MS; ¹H, ¹³C, ⁵¹V NMR), in addition 2 by single crystal X‐ray diffraction. The crystal structure indicates a folded cyclodivanadazen ring bridged by a bidentated ditellurido ligand, the first example of this structure type.