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The side-on end-on dinitrogen complex [PhP(CH(2)SiMe(2)NPh)(2)Ta](μ-H)(2)(μ-η(2):η(1)-N(2)) reacts with CS(2) with complete cleavage of both C=S double bonds and the formation of [PhP(CH(2)SiMe(2)NPh)(2)Ta](μ-S)(2)(μ-CH(2)), which has two bridging sulfides and a bridging methylene unit. Further reaction with H(2) produces CH(4) and the disulfide complex.

The formation of the P-cyclohexyl dinitrogen complex,= [CyP(CH 2 SiMe 2 NPh) 2 ], and Cy = C 6 H 11 ) is described and its reaction with butylsilane (BuSiH 3 ) explored. The reaction was monitored by multinuclear NMR spectroscopy and showed the formation of a

[2+2]‐Cycloadditionen an N2: Die η1:η2‐koordinierte N2‐Einheit des abgebildeten zweikernigen Tantalkomplexes reagiert mit 1,2‐Cumulenen wie Carbodiimiden, Schwefelkohlenstoff und Isothiocyanaten unter Bildung von neuen Kohlenstoff‐Stickstoff‐Bindungen.