Syntheses, structures, and properties of the bis(cyclopentadienyl) rare-earth imidodiphosphinochalcogenido compounds Cp2Ln[N(QPPh2)2] (Ln = La, Gd, Er, or Yb for Q = Se; Ln = Yb for Q = S)

Christopher G. Pernin, James A Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The compounds Cp2Ln[N(QPPh2)2] (Ln = La (1), Gd (2), Er (3), or Yb (4) for Q = Se, Ln = Yb (5) for Q = S) have been synthesized from the corresponding rare-earth tris(cyclopentadienyl) compound and H[N(QPPh2)2]. The structures of compounds 1, 2, 3, and 5, as determined by X-ray crystallography, consist of a Cp2Ln fragment, coordinated η3 through two chalcogen atoms and an N atom of the imidodiphosphinochalcogenido ligand [N(QPPh2)2]-. In compound 4, the Cp2Yb moiety is coordinated η2 through the two Se atoms of the [N(SePPh2)2]- ligand. 31P and 77Se (for 1) NMR spectroscopies lend insight into the solution nature of these species. Crystal data: 1, C34H30LaNP2Se2, triclinic, P1, a = 9.7959(10) Å, b = 12.4134(13) Å, c = 13.9077(14) Å, α = 88.106(2)°, β = 88.327(2)°, γ = 68.481(2)°, V = 1572.2(3) Å3, T = 153 K, Z = 2, and R1(F) = 0.0257 for the 5947 reflections with I > 2σ(I); 2, C34H30GdNP2Se2, triclinic, P1, a = 9.7130(14) Å, b = 12.2659(17) Å, c = 13.953(2) Å, α = 88.062(2)°, β = 87.613(2)°, γ = 69.041(2)°, V = 1550.7(4) Å3, T = 153 K, Z = 2, and R1(F) = 0.0323 for the 5064 reflections with I > 2σ(I); 3, C34H30ErNP2Se2, triclinic, P1, a = 9.704(2) Å, b = 12.222(3) Å, c = 13.980(4) Å, α = 88.230(4)°, β = 87.487(4)°, γ = 69.107(4)°, V = 1547.4(7) Å3, T = 153 K, Z = 2, and R1(F) = 0.0278 for the 6377 reflections with I > 2σ(I); 4, C34H30NP2Se2Yb·C4H8O, triclinic, P1, a = 12.087(4) Å, b = 12.429(4) Å, c = 23.990(7) Å, α = 89.406(5)°, β = 86.368(5)°, γ = 81.664(5)°, V = 3558.8(18) Å3, T = 153 K, Z = 4, and R1(F) = 0.0321 for the 11 883 reflections with I > 2σ(I); and 5, C34H30NP2S2Yb, monoclinic: P21/n, a = 13.8799(18) Å, b = 12.6747(16) Å, c = 17.180(2) Å, β, = 91.102(3)°, V = 3021.8(7) Å3, T = 153 K, Z = 4, and R1(F) = 0.0218 for the 6698 reflections with I > 2σ(I).

Original languageEnglish (US)
Pages (from-to)1216-1221
Number of pages6
JournalInorganic Chemistry
Volume39
Issue number6
DOIs
StatePublished - Mar 20 2000

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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