A family of polynuclear cobalt and nickel complexes stabilised by 2-pyridonate and carboxylate ligands

Cristiano Benelli; Alexander J. Blake; Euan K. Brechin; Simon J. Coles; Alasdair Graham; Steven G. Harris; Stephanie Meier; Andrew Parkin; Simon Parsons; Annela M. Seddon; Richard E.P. Winpenny

A family of polynuclear cobalt and nickel complexes stabilised by 2-pyridonate and carboxylate ligands

Cristiano Benelli, Alexander J. Blake, Euan K. Brechin, Simon J. Coles, Alasdair Graham, Steven G. Harris, Stephanie Meier, Andrew Parkin, Simon Parsons, Annela M. Seddon, Richard E.P. Winpenny^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

55 Citations (Scopus)

Abstract

The synthesis and structural characterisation of a series of cobalt and nickel cages are reported. Eight of these structures contain a [M₁₀(μ₃-OH)₆(η², μ₃-xhp)₆(η², μ₂-O₂CR)₆]²⁺ core (where M = Co or Ni; xhp = 6-chloro- or 6-methyl-2-pyridonate; R = Me, Ph, CHMe₂, CH₂Cl, CHPh₂ or CMe₃), where the ten metal atoms describe a centred-tricapped-trigonal prism (ttp). The cage contains six hydroxide ligands around the central metal, and the exterior is coated with pyridonate and carboxylate ligands. For four of the cages additional metal centres are found attached to the upper and/or lower triangular faces of the trigonal prism, generating dodeca-and undecanuclear cages. Three further cages are reported that contain a metal core based on an incomplete centred-tetraicosahedron. These cages involve trimethylacetate as a ligand in company with either 6-methyl-2-pyridonate or 6-chloro-2-pyridonate. Comparison of these latter structures with the trigonal prisms reveal that they can be described as a pentacapped-trigonal prism missing one edge. Magnetic studies of three of the nickel cages with trigonal prismatic cores show spin ground states of S = 8, 4 and 2 for Ni₁₂, Ni₁₁ and Ni₁₀ cages, respectively.

Original language	English
Pages (from-to)	883-896
Number of pages	14
Journal	Chemistry - A European Journal
Volume	6
Issue number	5
Publication status	Published - 3 Mar 2000

Keywords

Cage compounds
Cobalt
Magnetic properties
N ligands
Nickel

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title = "A family of polynuclear cobalt and nickel complexes stabilised by 2-pyridonate and carboxylate ligands",

abstract = "The synthesis and structural characterisation of a series of cobalt and nickel cages are reported. Eight of these structures contain a [M10(μ3-OH)6(η2, μ3-xhp)6(η2, μ2-O2CR)6]2+ core (where M = Co or Ni; xhp = 6-chloro- or 6-methyl-2-pyridonate; R = Me, Ph, CHMe2, CH2Cl, CHPh2 or CMe3), where the ten metal atoms describe a centred-tricapped-trigonal prism (ttp). The cage contains six hydroxide ligands around the central metal, and the exterior is coated with pyridonate and carboxylate ligands. For four of the cages additional metal centres are found attached to the upper and/or lower triangular faces of the trigonal prism, generating dodeca-and undecanuclear cages. Three further cages are reported that contain a metal core based on an incomplete centred-tetraicosahedron. These cages involve trimethylacetate as a ligand in company with either 6-methyl-2-pyridonate or 6-chloro-2-pyridonate. Comparison of these latter structures with the trigonal prisms reveal that they can be described as a pentacapped-trigonal prism missing one edge. Magnetic studies of three of the nickel cages with trigonal prismatic cores show spin ground states of S = 8, 4 and 2 for Ni12, Ni11 and Ni10 cages, respectively.",

keywords = "Cage compounds, Cobalt, Magnetic properties, N ligands, Nickel",

author = "Cristiano Benelli and Blake, {Alexander J.} and Brechin, {Euan K.} and Coles, {Simon J.} and Alasdair Graham and Harris, {Steven G.} and Stephanie Meier and Andrew Parkin and Simon Parsons and Seddon, {Annela M.} and Winpenny, {Richard E.P.}",

year = "2000",

month = mar,

day = "3",

language = "English",

volume = "6",

pages = "883--896",

journal = "Chemistry - A European Journal",

issn = "0947-6539",

publisher = "Wiley-VCH Verlag",

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TY - JOUR

T1 - A family of polynuclear cobalt and nickel complexes stabilised by 2-pyridonate and carboxylate ligands

AU - Benelli, Cristiano

AU - Blake, Alexander J.

AU - Brechin, Euan K.

AU - Coles, Simon J.

AU - Graham, Alasdair

AU - Harris, Steven G.

AU - Meier, Stephanie

AU - Parkin, Andrew

AU - Parsons, Simon

AU - Seddon, Annela M.

AU - Winpenny, Richard E.P.

PY - 2000/3/3

Y1 - 2000/3/3

N2 - The synthesis and structural characterisation of a series of cobalt and nickel cages are reported. Eight of these structures contain a [M10(μ3-OH)6(η2, μ3-xhp)6(η2, μ2-O2CR)6]2+ core (where M = Co or Ni; xhp = 6-chloro- or 6-methyl-2-pyridonate; R = Me, Ph, CHMe2, CH2Cl, CHPh2 or CMe3), where the ten metal atoms describe a centred-tricapped-trigonal prism (ttp). The cage contains six hydroxide ligands around the central metal, and the exterior is coated with pyridonate and carboxylate ligands. For four of the cages additional metal centres are found attached to the upper and/or lower triangular faces of the trigonal prism, generating dodeca-and undecanuclear cages. Three further cages are reported that contain a metal core based on an incomplete centred-tetraicosahedron. These cages involve trimethylacetate as a ligand in company with either 6-methyl-2-pyridonate or 6-chloro-2-pyridonate. Comparison of these latter structures with the trigonal prisms reveal that they can be described as a pentacapped-trigonal prism missing one edge. Magnetic studies of three of the nickel cages with trigonal prismatic cores show spin ground states of S = 8, 4 and 2 for Ni12, Ni11 and Ni10 cages, respectively.

AB - The synthesis and structural characterisation of a series of cobalt and nickel cages are reported. Eight of these structures contain a [M10(μ3-OH)6(η2, μ3-xhp)6(η2, μ2-O2CR)6]2+ core (where M = Co or Ni; xhp = 6-chloro- or 6-methyl-2-pyridonate; R = Me, Ph, CHMe2, CH2Cl, CHPh2 or CMe3), where the ten metal atoms describe a centred-tricapped-trigonal prism (ttp). The cage contains six hydroxide ligands around the central metal, and the exterior is coated with pyridonate and carboxylate ligands. For four of the cages additional metal centres are found attached to the upper and/or lower triangular faces of the trigonal prism, generating dodeca-and undecanuclear cages. Three further cages are reported that contain a metal core based on an incomplete centred-tetraicosahedron. These cages involve trimethylacetate as a ligand in company with either 6-methyl-2-pyridonate or 6-chloro-2-pyridonate. Comparison of these latter structures with the trigonal prisms reveal that they can be described as a pentacapped-trigonal prism missing one edge. Magnetic studies of three of the nickel cages with trigonal prismatic cores show spin ground states of S = 8, 4 and 2 for Ni12, Ni11 and Ni10 cages, respectively.

KW - Cage compounds

KW - Cobalt

KW - Magnetic properties

KW - N ligands

KW - Nickel

UR - http://www.scopus.com/inward/record.url?scp=0034599065&partnerID=8YFLogxK

M3 - Article (Academic Journal)

AN - SCOPUS:0034599065

SN - 0947-6539

VL - 6

SP - 883

EP - 896

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 5

ER -

A family of polynuclear cobalt and nickel complexes stabilised by 2-pyridonate and carboxylate ligands

Abstract

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