Tetrazenes structure

Tetrazene was discovered by Hofmann and Roth in 1910 and the structure determined by Duke. It is made by the action of sodium nitrite on aminoguanidine sulphate or nitrate under slightly acid conditions. 

The literature listed in Table 2 gives numerous examples of calculated bond lengths and angles with optimized geometry for the tetrazole tautomers. The electronic structures of the substituted 4,5-dihydrotetrazoles (14) have been investigated by MNDO and AM 1 calculations to explain their photoelectron spectra <88CB1213>. Their electronic structure resembles that of the c -2-tetrazene group and is characterized by three occupied n molecular orbitals and two n molecular... 

Structure (2.12) l-(5-Tetrazolyl)-4-guanyl tetrazene hydrate (tetrazene)... 

Hoffmann etal. [26] suggested the structural formula (la) for tetrazene, i.e. l-guanyl-4-nitrosoaminoguanyltetrazene. The correctness of this formula was later questioned by Patinkin, Horwitz and Lieber [27]. The synthesis of tetrazene by the action of tetrazolediazonium hydroxide (II) on aminoguanidine salts (III) at 0°C, suggested that tetrazene has the structure of l-(5-tetrazolyl)-4-guanyltetrazene hydrate (I) ... 

An unusual tetrazene complex of platinum(IV) is obtained from tra/ts-Pt(C CPh)2(PEt3)2 and 4-nitrophenylazide (equation 371).1209 The structure has been verified by crystallography. The analogous platinum(Il) complexes can be formed by reacting Pt(cod)2 with aryl azides followed by triethylphosphine.1210 The complexes with non-symmetrical RN4R ligands are also known.1211... 

The molecular structure of bis(perfluorophenyl)(tetramethyltetrazene)zinc (54) shows tetrahedral coordination about the zinc,411 with the N4 system of the tetrazene in a trans configuration bonded to the zinc via N—1 and N—3 (Zn—N = 2.13, 2.25 A). NMR data are consistent with a rapid equilibrium in solution (equation 4). 

The tetrazene-bridged structure 44 has been tentatively proposed for the complex obtained from the reaction of phenylhydrazine with molybdate(VI)... 

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