名称:
Coordination chemistry of perhalogenated cyclopentadienes XXII. Reaction of tetrabromodiazocyclopentadiene with some halide bridged Rh(I), Ru(II) and Ru(III) complexes. Molecular structure of [C5Br5]Rh(COD), a complex with an η1,η4-coordinated cyclopentadienyl ligand
摘要:
The halide bridged complexes [Cp*RuBr2](n) and [(COD)Rh(mu-X)](2) (X = Cl, Br) react with tetrabromodiazocyclopentadiene C5Br4N2 to give the pentahalocyclopentadienyl complexes Cp*Ru[C5Br5] (1a) and either [C5Br4Cl]Rh(COD) (2a) or [C5Br5]Rh(COD) (2b), respectively. Treatment of C5Cl4N2 with [Cp*RuBr](4) or [(COD)Rh(mu-Br)](2) yields the analogous complexes LnM [C5Cl4Br] (LnM = Cp*Ru (1b), (COD)Rh (2c)) in high yield. A crystal structure determination of 2b shows the cyclopentadienyl ligand in an unusual eta(1),eta(4)-bonding fashion. Crystals of 2b are orthorhombic, space group Pnma, a = 10.86(2), b = 12.841(5), c = 11.972(4) Angstrom, V = 1670(3) Angstrom(3), Z = 4, R1 = 5.81%, wR2 = 14.22%. (C) 1998 Elsevier Science S.A.