C2H2N4

We performed a series of theoretical studies on pump-probe diffraction patterns with a twofold objective the first aim is to evaluate the effect of electronic and vibrational excitation on electron diffraction patterns, compared to that of structural rearrangements that are the primary goal for observation in structural dynamics measurements. Secondly, we wish to explore to what extent electronic and vibrational probability density distributions are observable using the pump-probe electron diffraction methodology. Previously we have discussed the effect of electronic excitation in atomic systems,[3] and the observability of vibrational excitation in diatomic and triatomic systems.[4,5] We have now extended this work to the 8-atomic molecule s-tetrazine (C2H2N4). 

Both mononuclear [M(CO)5(C2H2N4)] and binuclear complexes [ M(CO)5 2(C2H2N4)] are formed when unsubstituted tetrazine (C2H2N4) is added to a photoirradiated solution of the metal hexacarbonyl [M(CO)6] (M = Cr, Mo, W) in ethanol. For the mononuclear complexes two signals were obtained in the H NMR spectra while in the binuclear complexes only one signal was found (76ZN(B)1489). 

C Hio, C4H N2j CsH Q/C CIF, c2h2n4, C2HF3 CC1FO C5H9K c3h5n3s c4h5no... 

The other expl tetrazines consist of the parent compd, sym-Tetrazine and its derivatives Sym-Tetrazine (or 1,2,4,5-Tetrazine). C2H2N4 mw 82.08 N 68.27% OB to C02 -97.47% dark purple-red prisms with volatile red fumes... 

Tetrazine [290-96-0] N N N N Sulfuric acid Sorbe, 1968, 139 The solid base decomposes violently in contact with cone. acid. See other HIGH-NITROGEN COMPOUNDS, ORGANIC BASES C2H2N4... 

C3H3N3 and also the tetrazines C2H2N4 are very stable compounds, pentazine CHN5 and hexazine N6, a polymer of nitrogen, do not exist. This is not due to the instability of these molecules as such but to the very special stability of the triple bond in nitrogen and in HCN, compared with the corresponding single and double bonds, while this holds to a much smaller extent for the triple carbon-carbon bond (Table 18). 

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