ORGANOMETALLIC LEWIS-ACIDS .48. NEW PRECURSORS TO ORGANOMETALLIC CATIONIC LEWIS-ACIDS WITH 2 ACCESSIBLE COORDINATION SITES - (OC)4RE(OET2)FBF3 AND (OC)2(PPH3)2RU(FBF3)2
R. Kramer et al., ORGANOMETALLIC LEWIS-ACIDS .48. NEW PRECURSORS TO ORGANOMETALLIC CATIONIC LEWIS-ACIDS WITH 2 ACCESSIBLE COORDINATION SITES - (OC)4RE(OET2)FBF3 AND (OC)2(PPH3)2RU(FBF3)2, Chemische Berichte, 126(4), 1993, pp. 927-932
The allyl transfer reaction between Re(CO)5- and [eta3-allyl)PdCl]2 co
mplexes leads to (allyl)rhenium complexes (eta3-H2CCR1CR2R3)Re(CO), (1
: R1, R2, R3 = H; 2: R2, R3 = H, R1 = Me; 3: R1, R2 = H, R 3 = Me; 4:
R1 = H, R2, R3 = Me). The 2-methylallyl complex 2 has been characteriz
ed by low-temperature X-ray diffraction. Protonation of 1 with HBF4.OE
t2 in CH2Cl2 gives the complex (OC)4Re(OEt2)FBF3 (5), which is a precu
rsor for the 14 e- System ''(OC)4Re+''. THF and H2O replace the diethy
l ether in 5 to give [(OC)4Re(solvent)2]BF4 (6, 7). The reaction of (O
C)2(PPh3)2RuCl2 with AgBF4 yields the complex (OC)2(PPh3)2Ru(FBF3)2 (8
), which can be considered as a precursor for the 14 e- cation ''(OC)2
(PPh3)2Ru2+'' and reacts with H2O to give [(OC)2(PPh3)2Ru(F)(H2O)]BF4
(9). Complexes 5-9 are characterized by IR, H-1-, C-13-, P-31- and F-1
9-NMR spectroscopy.