X-ray Structure of the Isodiazomethane Complex Cr(CO)<sub>5</sub>C≡N-NH<sub>2</sub>and [3+2]-Cycloadditions to the Metallo-Nitrile-Imine [Cr(CO)<sub>5</sub>C≡N-NH]<sup>-</sup>[1]
作者:Wolf Peter Fehlhammer、Friedrich Schoder、Bernd Weinberger、Heribert Stolzenberg、Wolfgang Beck
DOI:10.1002/zaac.200900085
日期:2009.7
The structure of [Cr(CO)5CNNH2] (1a) containing Eugen Muller’s “isodiazomethane” as a ligand has been determined by X-ray diffraction. In its deprotonated form 1a acts as a 1,3-dipole of the (metallo) nitrile imine type, i.e., undergoes [3+2]-cycloaddition reactions with acetylenes (MeO2CC≡CCO2Me), trifluoroacetonitrile,carbon disulfide and isocyanate (PhNCO). The new 16-electron ligand [C≡N–NH]– is
Reactions of bis(trimethylsilyl)isocyanamine and its isomers with chlorotriphenylphosphonium chloride: evidence for a transient diazomethylenetriphenylphosphorane. Crystal structure of [Ph3P][PF6]2
作者:Gerhard Zinner、Gerhard Beck、Wolf P. Fehlhammer、Nils Wiberg
DOI:10.1016/0022-328x(89)80114-7
日期:1989.5
Triphenylphosphinedichloride reacts with (Me3Si)2CNN, Me3SiNCNSiMe3, and metal-coordinated CNN(SiMe3)2 to give the iminophosphoranes CNNPPh3, NCNPPh3, and W(CO)5CNNPPh3, respectively, and with free bis(trimethylsilyl)isocyanamine to give a dicationic species containing a tetrazole ring with triphenylphosphonio and bis(triphenylphosphonio)methylide substituents. This latter product can be regarded