Synthesis and study on thermal stability of cyclopentadienyl (or indenyl) early lanthanide complexes involving 8—quinolinolato and o—aminophenolato chelate ligands

Zhongzhi Wu, Zheng Xu, Xiaozeng You, Xigen Zhou

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12 Citations (Scopus)

Abstract

Reaction of Cp3Pr or Ind3Pr • THF (Cp = C5H5; Ind = C9H7) with 8—hydroxyquinoline (HL1) or o—aminophenol (HL2) (1 : 1, l : 2 molar ratio) in THF tetrahydrofuran) at room temperature affords six new organolanthanide complexes, namely, Cp2PrL1 (1), Cp2PrL2 (2), CpPrL2(3), Ind2PrL1 (4), Ind2PrL2 (5) and IndPrL2(6). Other new mixed—ligand organolanthanide complexes, CpPrL!L2(7), CpNdL]L2 (8), IndPrLV (9) and IndNdL^2(10) also have been synthesized by reacting CpsLnL1or Ind2LnL1(Ln = Pr, Nd) with o—aminophenol in THF at room temperature. The structures of all the complexes were verified by elemental analysis, IR, MS and XPS spectra and molecular weight determination, indicating that they are possibly monomeric and L1 or L2 chelates with the metal to form an intramolecular five—membered ring. The thermal stability of these complexes has been studied and compared. Complexes of the types CpLnlJj and IndLnL2 (Ln — Pr, Nd) are very thermally unstable and tend to disproportionate into a mixture of Cp2LnL2 (or Ind2LnL2) and LnL2 at room temperature. Complexes 1–10 are stable with respect to disproportionation at room temperature, but above 140 ° C, 1 — 3 disproportionate into Cp3Pr and PrL3 (or PrL2).

Original languageEnglish (US)
Pages (from-to)1155-1169
Number of pages15
JournalSynthesis and Reactivity in Inorganic and Metal-Organic Chemistry
Volume23
Issue number7
DOIs
StatePublished - Jul 1 1993

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Lanthanoid Series Elements
chelates
Thermodynamic stability
thermal stability
Ligands
ligands
room temperature
synthesis
Temperature
tetrahydrofuran
molecular weight
X ray photoelectron spectroscopy
Metals
Molecular weight
rings
Chemical analysis
metals

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

Cite this

@article{e5180567b23741c5bf1ac036bf5e4023,
title = "Synthesis and study on thermal stability of cyclopentadienyl (or indenyl) early lanthanide complexes involving 8—quinolinolato and o—aminophenolato chelate ligands",
abstract = "Reaction of Cp3Pr or Ind3Pr • THF (Cp = C5H5; Ind = C9H7) with 8—hydroxyquinoline (HL1) or o—aminophenol (HL2) (1 : 1, l : 2 molar ratio) in THF tetrahydrofuran) at room temperature affords six new organolanthanide complexes, namely, Cp2PrL1 (1), Cp2PrL2 (2), CpPrL2(3), Ind2PrL1 (4), Ind2PrL2 (5) and IndPrL2(6). Other new mixed—ligand organolanthanide complexes, CpPrL!L2(7), CpNdL]L2 (8), IndPrLV (9) and IndNdL^2(10) also have been synthesized by reacting CpsLnL1or Ind2LnL1(Ln = Pr, Nd) with o—aminophenol in THF at room temperature. The structures of all the complexes were verified by elemental analysis, IR, MS and XPS spectra and molecular weight determination, indicating that they are possibly monomeric and L1 or L2 chelates with the metal to form an intramolecular five—membered ring. The thermal stability of these complexes has been studied and compared. Complexes of the types CpLnlJj and IndLnL2 (Ln — Pr, Nd) are very thermally unstable and tend to disproportionate into a mixture of Cp2LnL2 (or Ind2LnL2) and LnL2 at room temperature. Complexes 1–10 are stable with respect to disproportionation at room temperature, but above 140 ° C, 1 — 3 disproportionate into Cp3Pr and PrL3 (or PrL2).",
author = "Zhongzhi Wu and Zheng Xu and Xiaozeng You and Xigen Zhou",
year = "1993",
month = "7",
day = "1",
doi = "10.1080/15533179308016676",
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pages = "1155--1169",
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TY - JOUR

T1 - Synthesis and study on thermal stability of cyclopentadienyl (or indenyl) early lanthanide complexes involving 8—quinolinolato and o—aminophenolato chelate ligands

AU - Wu, Zhongzhi

AU - Xu, Zheng

AU - You, Xiaozeng

AU - Zhou, Xigen

PY - 1993/7/1

Y1 - 1993/7/1

N2 - Reaction of Cp3Pr or Ind3Pr • THF (Cp = C5H5; Ind = C9H7) with 8—hydroxyquinoline (HL1) or o—aminophenol (HL2) (1 : 1, l : 2 molar ratio) in THF tetrahydrofuran) at room temperature affords six new organolanthanide complexes, namely, Cp2PrL1 (1), Cp2PrL2 (2), CpPrL2(3), Ind2PrL1 (4), Ind2PrL2 (5) and IndPrL2(6). Other new mixed—ligand organolanthanide complexes, CpPrL!L2(7), CpNdL]L2 (8), IndPrLV (9) and IndNdL^2(10) also have been synthesized by reacting CpsLnL1or Ind2LnL1(Ln = Pr, Nd) with o—aminophenol in THF at room temperature. The structures of all the complexes were verified by elemental analysis, IR, MS and XPS spectra and molecular weight determination, indicating that they are possibly monomeric and L1 or L2 chelates with the metal to form an intramolecular five—membered ring. The thermal stability of these complexes has been studied and compared. Complexes of the types CpLnlJj and IndLnL2 (Ln — Pr, Nd) are very thermally unstable and tend to disproportionate into a mixture of Cp2LnL2 (or Ind2LnL2) and LnL2 at room temperature. Complexes 1–10 are stable with respect to disproportionation at room temperature, but above 140 ° C, 1 — 3 disproportionate into Cp3Pr and PrL3 (or PrL2).

AB - Reaction of Cp3Pr or Ind3Pr • THF (Cp = C5H5; Ind = C9H7) with 8—hydroxyquinoline (HL1) or o—aminophenol (HL2) (1 : 1, l : 2 molar ratio) in THF tetrahydrofuran) at room temperature affords six new organolanthanide complexes, namely, Cp2PrL1 (1), Cp2PrL2 (2), CpPrL2(3), Ind2PrL1 (4), Ind2PrL2 (5) and IndPrL2(6). Other new mixed—ligand organolanthanide complexes, CpPrL!L2(7), CpNdL]L2 (8), IndPrLV (9) and IndNdL^2(10) also have been synthesized by reacting CpsLnL1or Ind2LnL1(Ln = Pr, Nd) with o—aminophenol in THF at room temperature. The structures of all the complexes were verified by elemental analysis, IR, MS and XPS spectra and molecular weight determination, indicating that they are possibly monomeric and L1 or L2 chelates with the metal to form an intramolecular five—membered ring. The thermal stability of these complexes has been studied and compared. Complexes of the types CpLnlJj and IndLnL2 (Ln — Pr, Nd) are very thermally unstable and tend to disproportionate into a mixture of Cp2LnL2 (or Ind2LnL2) and LnL2 at room temperature. Complexes 1–10 are stable with respect to disproportionation at room temperature, but above 140 ° C, 1 — 3 disproportionate into Cp3Pr and PrL3 (or PrL2).

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U2 - 10.1080/15533179308016676

DO - 10.1080/15533179308016676

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VL - 23

SP - 1155

EP - 1169

JO - Inorganic and Nano-Metal Chemistry

JF - Inorganic and Nano-Metal Chemistry

SN - 2470-1556

IS - 7

ER -