Reaction of the thermo-labile triazenide Na[tBu(3)SiNNNSiMe(3)] with CO2: formation of the imido carbonate (tBu(3)SiO)(Me3SiO)C=N-SitBu(3) and carbamine acid (tBu(3)SiO)CONH2

摘要

The thermo-labile triazenide Na[tBu(3)SiNNNSiMe(3)] was prepared by the reaction of Me3SiN3 with Na(thf)(2)[SitBu(3)] in pentane at -78 degrees C. Treatment of Na[tBu(3)SiNNNSiMe(3)] with an excess of carbon dioxide in pentane at -78 degrees C yielded the imido carbonate (tBu(3)SiO)(Me3SiO) C=N-SitBu(3) and the carbamine acid (tBu(3)SiO)CONH2 along with other products. From the reaction solution we could isolate the imido carbonate (tBu(3)SiO)(Me3SiO)C=N-SitBu(3) and carbamine acid (tBu(3)SiO) CONH2. At first single crystals of the carbamine acid (tBu(3)SiO) CONH2 (triclinic, space group P (1) over bar) were grown from this solution at room temperature. A second crop of crystals were obtained by concentrating the solution. The second charge consisted of the imido carbonate (tBu(3)SiO)(Me3SiO)C=N-SitBu(3) (monoclinic, space group P2(1)/n).