Bis(mercapto) and hydrido(thiolate) complexes of Ru(II)-dppm (dppm = Ph2PCH2PPh2)

From a mixture of cis- and trans-Ru(SH)(2)(dppm)(2) (4), formed from reacti on of H2S with trans-Ru(H)Cl(dppm)(2) (2), a crystal of cis-4 has been isol ated and its structure determined by X-ray analysis. The mercapto protons a re located within the centrosymmetric structure, although the S-atoms are p artially disordered (S - H similar to 1.06 Angstrom). The thiolate complexe s, trans-Ru(H)SR(dppm)(2) (R = Ph, 5a; C6F5, 5b), have been isolated from r eaction of trans-2 with 1 equiv. of RSH. trans-Ru(H)SH(dppm)(2) (3) has bee n isolated from reaction of H2S with a mixture of cis- and trans-Ru(H)(2)(d ppm)(2) (1). An improved synthetic route for 1 is presented. (C) 2001 Elsev ier Science B.V. All rights reserved.