sodium; naphthalene in not given under Ar, Na(Ni(Cp)(CO)) (prepared in situ by Na-naphthalene reduction of 2 equiv of Ni-complex) was treated with 1 equiv of MeC(CH2I)3 at -78°C, warmed to room temp., stirred overnight; solvent removed under reduced pressure, the residue extd. (n-hexane), sepd. by chromy., solvent removed under vac., CpNi(CH2C(Me)CH2CH2CO) crystd. from n-hexane; elem. anal.;

hydrazine hydrate T=140°C;

T=140°C;