Transition metal-substituted phosphaalkenes. 42 - Reactivity of the ferriophsophaalkenes [(eta(5)-C5Me5)(CO)(2)FeP=C(NR21)R-2] (NR21 = NMe2, NC5H10, R-2 = Ph, tBu) towards protic acids, alkylation reagents, and [{(Z)-cyclooctene}Cr(CO)(5)]

The reaction of equimolar amounts of C(eta(5)-C5Me5)(CO)(2)FeP=C(NR21)R-2] (2a: NR21=NMe2, R-2=Ph; 2 b: NMe2. tBu; 2 c: NC5H10, Ph) and etherial HBF4 gave rise to the formation of [(eta(5)-C5Me5)(CO)(2)FeP(H)C(NR21)R-2] (BF4) (3a-c) which were isolated as light red powders. Compounds 2a-c were conve rted into [(eta(5)-C5Me5(CO)(2)FeP(Me)C(NR21)R-2] (SO3CF3) (4a-c) by treatm ent with methyl trifluoromethane sulfonate. In addition 2a and Me3SiCH2OSO2 CF3 afforded light red [(eta(5)-C5Me5)-(CO)(2)FeP(CH2SiMe3)C(NMe2)Ph] (SO3C F3) (5). The black complex [(eta(5)-C5Me5)(CO)(2)FeP{Cr(CO)(5)}C(NMe2)Ph] ( 6) resulted from the combination of 2a with [{(Z)-cyclooctene}Cr(CO)(5)], T he novel products were characterized by elemental analyses and spectra (IR, H-1-,C-13- und P-31- NMR).