title: Synthesis and structural characterization of two novel heterometallic clusters: [Rh4Pt2(CO)11(dppm)2] and [Ru2Rh2Pt2(CO)12(dppm)2].
abstract: Two novel heterometallic octahedral clusters [Rh(4)Pt(2)(CO)(11)(dppm)(2)](1) and [Ru(2)Rh(2)Pt(2)(CO)(12)(dppm)(2)](2) were synthesized by the reaction of [Rh(2)Pt(2)(CO)(6)(dppm)(2)] with [Rh(6)(CO)(14)(NCMe)(2)] and Ru(3)(CO)(12), respectively. Solid state structures of 1 and 2 have been established by a single crystal X-ray diffraction study. Two dppm ligands in 1 are bonded to one platinum and three rhodium atoms, which form an equatorial plane of the Rh(4)Pt(2) octahedron. Two rhodium and two platinum atoms bound to the diphosphine ligands in 2 are nonplanar to give an octahedral C2 symmetric Ru(2)Rh(2)Pt(2)(dppm)2 framework. The (31)P NMR investigation of and (1D, (31)P COSY, (31)P-[(103)Rh] HMQC) and simulation of 1D spectral patterns showed that in both clusters the structures of the M(6)(PP)(2) fragments found in the solid state are maintained in solution.
authors.affiliation: Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, Staryi Peterhof 198504, Russian Federation.
authors.forename: Igor O
authors.initials: IO
authors.lastname: Koshevoy
authors.forename: Elena V
authors.initials: EV
authors.lastname: Grachova
authors.forename: Sergey P
authors.initials: SP
authors.lastname: Tunik
authors.forename: Matti
authors.initials: M
authors.lastname: Haukka
authors.forename: Tapani A
authors.initials: TA
authors.lastname: Pakkanen
authors.forename: Brian T
authors.initials: BT
authors.lastname: Heaton
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Iggo
authors.forename: Ivan S
authors.initials: IS
authors.lastname: Podkorytov