tetrahydrofuran in tetrahydrofuran Ti(C5H5)Cl3 and a soln. of hydrazide mixed in vacuo (2:1 and 1:1 stoicheiometry) and allowed to stand overnight; detected by mass and ESR spectroscopy; various ratio of products;

in tetrahydrofuran N2-atmosphere; treatment of V-complex with 1 equiv. LiNHNH2 (-40°C, stirring for 4 h), warming to room temp.;