Reactivity of the dirhenium(III) carboxylate complexes Re2(O2CCH3)2X4(H2O)2 (X = Cl or Br) toward monodentate phosphines. A novel disproportionation reaction leading to dirhenium(IV,II) alkoxide complexes of the type (RO)2X2ReReX2(PPh3)2 (X = Cl or Br; R = Me, Et, or Pr)

The Electronic Spectrum of Re2Cl82-: A Theoretical Study

“…6 They performed multiconfigurational self-consistent field (MCSCF) and configuration interaction (CI) calculations with relativistic effective core potentials at the experimental geometry of the complex. 1, 7 The ground state and the two lowest excited states were studied. However, none of these earlier studies gave a more complete treatment of the low-lying excited states, and the computed energies were not accurate enough to give an unambiguous assignment of the experimental spectrum.…”

A novel dirhenium(III) complex with bridging picolinate and methoxide ligands from the reaction between cis-Re2(μ-O2CCH3)2Cl4(H2O)2 and picolinic acid

“…methanol by forming a l-OEt complex, since the dirhenium(III) alkoxides Re 2 (OR) 2 Cl 2 (PAr 3 ) 2 (where Ar represents an aryl group) have been prepared previously [11,12] and they are quite stable; these compounds contain terminal alkoxide ligands and the ethoxides seem to be as stable and as easy to obtain as methoxides.…”

“…The compound cis-Re 2 (l-O 2 CCH 3 ) 2 Cl 4 (H 2 O) 2 was prepared by the literature method [4]. Picolinic acid (Hpic, pyridine-2-carboxylic acid) was purchased from Aldrich Chemical Co. All other reagents and organic solvents were obtained from commercial sources and were used without further purification.…”

“…In an earlier report [1] we had described the reactions of the dirhenium(III) synthons cis-Re 2 (l-O 2 CR) 2 Cl 4 L 2 (R ¼ CH 3 or C 2 H 5 ; L ¼ H 2 O or 4-Mepy) [2] with 2-hydroxypyridine (Hhp) and 2-hydroxy-6-methylpyridine (Hmhp) that afford the complexes Re 2 (l-hp) 2 Cl 4 Á Hhp, Re 2 (l-hp) 4 Cl 2 and Re 2 (l-mhp) 2 Cl 4 Á Hmhp in which the l-acetate ligands are displaced and 2-pyridonate ligands bridge the dimetal centers. We are now examining the reactions of cis-Re 2 (l-O 2 CCH 3 ) 2 Cl 4 (H 2 O) 2 towards various pyridine carboxylic acids in order to assess the stability of the [Re 2 ] 6þ core to ligands of this type that have the potential to be used to incorporate this multiply bonded dimetal unit, and others of a similar ilk, into mixed-metal assemblies [3].…”

Heterometallic Molecular Squares and Polymers Based On Self‐Assembly Reactions of Multiply Bonded Dirhenium Complexes

“…The starting materials cis-[Re 2 Cl 2 (dppm) 2 (O 2 CC 5 H 4 N-4) 2 ], [7] cis-[Re 2 Cl 4 (O 2 CCH 3 ) 2 -(H 2 O) 2 ], [16] [Rh 2 (O 2 CCH 3 ) 4 ] [17] were synthesized by literature methods. Silver triflate and zinc chloride were purchased from Aldrich and used without further purification.…”