Mixed-ligand ytterbium(iii) complexes incorporating one or two bidentate (N, O) amide ligands

Glen B Deacon; Craig Macdonald Forsyth; Natalie M Scott

doi:10.1039/b303724j

Mixed-ligand ytterbium(iii) complexes incorporating one or two bidentate (N, O) amide ligands

Glen B Deacon, Craig Macdonald Forsyth, Natalie M Scott

School of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

8 Citations (Scopus)

Abstract

Examples of the ability of the donor-functionalised amide ligands N-(2-methoxyphenyl)-N-(trimethylsilyl)amide (L¹) and N-(2-phenoxyphenyl)-N-(trimethylsilyl)amide (L²) to support mixed-ligand lanthanoid complexes of the type [Ln(L)₂A] or [Ln(L)AB] are described. Reaction of [Yb(OAr)₃] (Ar = C₆H₃Bu^t₂-2,6) with two equivalents of [Li(L²)]_n in hexane gave hexane-soluble, monomeric and five-coordinate [Yb(L²)₂(OAr)] (1) in high yield. Attempted preparation of an analogous [Yb(L¹)₂(MeCp)] complex by reaction of [Yb(MeCp)Cl₂(thf)] with [Li(L¹)(OEt₂)]₂ (with a Yb ∶ Li ratio of 1 ∶ 2) in thf instead gave the known [Yb(L¹)₂(μ-Cl)]₂ (2). In contrast, the stable complexes [Yb(MeCp)(L¹)(μ-Cl)]₂ (3) and [Yb(MeCp)(L²)(μ-Cl)]₂ (4) were readily obtained from 1 ∶ 1 (Li ∶ Yb) reaction of [Yb(MeCp)Cl₂(thf)] with [Li(L¹)(OEt₂)]₂ or [Li(L²)(dme)] in thf. The complexes 1, 3 and 4 have been characterised by X-ray structure determination.

Original language	English
Pages (from-to)	3216-3220
Number of pages	5
Journal	Dalton Transactions
Volume	3
Issue number	16
DOIs	https://doi.org/10.1039/b303724j
Publication status	Published - 7 Aug 2003

Keywords

Cyclopentadienyl and related alkenyl ligands
Lanthanides
Organometallic
P, N, S, Se, O, Te, Si-containing ligands
Structural studies

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10.1039/b303724j

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title = "Mixed-ligand ytterbium(iii) complexes incorporating one or two bidentate (N, O) amide ligands",

abstract = "Examples of the ability of the donor-functionalised amide ligands N-(2-methoxyphenyl)-N-(trimethylsilyl)amide (L1) and N-(2-phenoxyphenyl)-N-(trimethylsilyl)amide (L2) to support mixed-ligand lanthanoid complexes of the type [Ln(L)2A] or [Ln(L)AB] are described. Reaction of [Yb(OAr)3] (Ar = C6H3But2-2,6) with two equivalents of [Li(L2)]n in hexane gave hexane-soluble, monomeric and five-coordinate [Yb(L2)2(OAr)] (1) in high yield. Attempted preparation of an analogous [Yb(L1)2(MeCp)] complex by reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 (with a Yb ∶ Li ratio of 1 ∶ 2) in thf instead gave the known [Yb(L1)2(μ-Cl)]2 (2). In contrast, the stable complexes [Yb(MeCp)(L1)(μ-Cl)]2 (3) and [Yb(MeCp)(L2)(μ-Cl)]2 (4) were readily obtained from 1 ∶ 1 (Li ∶ Yb) reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 or [Li(L2)(dme)] in thf. The complexes 1, 3 and 4 have been characterised by X-ray structure determination.",

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author = "Deacon, {Glen B} and Forsyth, {Craig Macdonald} and Scott, {Natalie M}",

year = "2003",

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day = "7",

doi = "10.1039/b303724j",

language = "English",

volume = "3",

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journal = "Dalton Transactions",

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TY - JOUR

T1 - Mixed-ligand ytterbium(iii) complexes incorporating one or two bidentate (N, O) amide ligands

AU - Deacon, Glen B

AU - Forsyth, Craig Macdonald

AU - Scott, Natalie M

PY - 2003/8/7

Y1 - 2003/8/7

N2 - Examples of the ability of the donor-functionalised amide ligands N-(2-methoxyphenyl)-N-(trimethylsilyl)amide (L1) and N-(2-phenoxyphenyl)-N-(trimethylsilyl)amide (L2) to support mixed-ligand lanthanoid complexes of the type [Ln(L)2A] or [Ln(L)AB] are described. Reaction of [Yb(OAr)3] (Ar = C6H3But2-2,6) with two equivalents of [Li(L2)]n in hexane gave hexane-soluble, monomeric and five-coordinate [Yb(L2)2(OAr)] (1) in high yield. Attempted preparation of an analogous [Yb(L1)2(MeCp)] complex by reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 (with a Yb ∶ Li ratio of 1 ∶ 2) in thf instead gave the known [Yb(L1)2(μ-Cl)]2 (2). In contrast, the stable complexes [Yb(MeCp)(L1)(μ-Cl)]2 (3) and [Yb(MeCp)(L2)(μ-Cl)]2 (4) were readily obtained from 1 ∶ 1 (Li ∶ Yb) reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 or [Li(L2)(dme)] in thf. The complexes 1, 3 and 4 have been characterised by X-ray structure determination.

AB - Examples of the ability of the donor-functionalised amide ligands N-(2-methoxyphenyl)-N-(trimethylsilyl)amide (L1) and N-(2-phenoxyphenyl)-N-(trimethylsilyl)amide (L2) to support mixed-ligand lanthanoid complexes of the type [Ln(L)2A] or [Ln(L)AB] are described. Reaction of [Yb(OAr)3] (Ar = C6H3But2-2,6) with two equivalents of [Li(L2)]n in hexane gave hexane-soluble, monomeric and five-coordinate [Yb(L2)2(OAr)] (1) in high yield. Attempted preparation of an analogous [Yb(L1)2(MeCp)] complex by reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 (with a Yb ∶ Li ratio of 1 ∶ 2) in thf instead gave the known [Yb(L1)2(μ-Cl)]2 (2). In contrast, the stable complexes [Yb(MeCp)(L1)(μ-Cl)]2 (3) and [Yb(MeCp)(L2)(μ-Cl)]2 (4) were readily obtained from 1 ∶ 1 (Li ∶ Yb) reaction of [Yb(MeCp)Cl2(thf)] with [Li(L1)(OEt2)]2 or [Li(L2)(dme)] in thf. The complexes 1, 3 and 4 have been characterised by X-ray structure determination.

KW - Cyclopentadienyl and related alkenyl ligands

KW - Lanthanides

KW - Organometallic

KW - P, N, S, Se, O, Te, Si-containing ligands

KW - Structural studies

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U2 - 10.1039/b303724j

DO - 10.1039/b303724j

M3 - Article

SN - 1477-9226

VL - 3

SP - 3216

EP - 3220

JO - Dalton Transactions

JF - Dalton Transactions

IS - 16

ER -

Mixed-ligand ytterbium(iii) complexes incorporating one or two bidentate (N, O) amide ligands

Abstract

Keywords

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