SELECTIVE ACTIVATION OF CARBON-CHLORINE BONDS BY THE ELECTROPHILIC FRAGMENT CP-ASTERISK-RU+

The "Cp*Ru+" fragment (1) reacts with cyclic chlorinated hydrocarbons C6H11Cl, 1,2-C6H10Cl2, alpha-C6H6Cl6 and 1.2-C6H9(O)Cl to yield [Cp*Ru(eta-6-C6H6)](CF3SO3) (2) in 60, 90, 35 and 90% yield. respectively; with 2,2,6,6-C6H7Cl4OH the reaction depends upon the conditions but in the absence of dihydrogen [Cp*Ru(eta-6-C6H5OH)](CF3SO3) (4) is the major product. indicating a selectivity for C-Cl activation in the presence of C-O bonds; finally a new series of chlorinated clusters [(Cp*Ru)3(mu-Cl)2(mu-X)(mu-3-CY)](CF3SO3)n (X = Cl, Y = H, n = 1; 5; X = CO, Y = H. n = 2: 6; X = CO, Y = Cl, n = 2: 8) is prepared in high yield from reactions of 1 with CH2Cl2 or 1,2-C6H10Cl(OH).