The organometallic fac-[(CO)3Mn(H2O)3]+ aquaion: base-hydrolysis and kinetics of H2O-substitution.

The novel organometallic aqua complex [(CO)(3)Mn(H(2)O)(3)](+) (1(+)) was obtained through hydrolysis of the analogous acetone complex. IR [nu(CO) = 2051, 1944 cm(-)(1)] and (17)O NMR spectroscopy revealed the presence of a fac tricarbonyl unit. Potentiometric titrations established that the trimer [(CO)(3)Mn(3)(OH)(4)](-) was the principal condensation product in the pH range >6 prior to slow formation of the tetramer [[(CO)(3)Mn](OH)](4).

Synthesis and Complexation Properties of the Anions (eta(5)-C(5)Me(5))Ru(PR(2)O)(3)(2)(-) as Ligands.

Reaction of [(eta(5)-C(5)Me(5))Ru(OMe)](2) (2) with HP(O)(OR)(2) gave the novel tripod ligands H(2)(eta(5)-C(5)Me(5))Ru{PO(OR)(2)}(3) (R = Me, Et, (i)Pr, H(2)1). H(2)(eta(5)-C(5)Me(5))Ru{PO(Ph(2))}(3) was formed with HP(O)Ph(2). [(eta(5)-C(5)Me(5))RuCl(2)](2) (3) with NaP(O)(OEt)(2) similarly gave Na(2)(eta(5)-C(5)Me(5))Ru{PO(OEt)(2)}(3) (Na(2)1; Na(2)L).