The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands

Simon A. Cotton; Paul R. Raithby; Stephanie Schiffers; Simon J. Teat; John E. Warren

doi:10.3390/molecules27062024

The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands

Simon A. Cotton, Paul R. Raithby, Stephanie Schiffers, Simon J. Teat, John E. Warren

MACE - Administration

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Abstract

The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements and compare the coordination numbers and coordination geometries adopted. The steric and electronic properties of the coordinated ligands have a major influence on the structures adopted. We report the synthesis and crystal structure determination of an unusual dinuclear scandium complex [(bipy)(NO₃)₂Sc(µ-OH)₂Sc(NO₃)₂ (bipy)] obtained by the reaction of hydrated scandium nitrate with 2,2′-bipyridyl (bipy) in either ethanol or nitromethane. The crystal structure of the complex shows that the scandium centers are eight coordinate, and the structure obtained contrasts with related complexes found in the lanthanide series [Ln(bipy)₂ (NO₃)₃ ] and [Ln(phen)₂ (NO₃)₃ ] (phen = phenanthroline) and in [M(terpy)(NO₃)₃ ] (M = Sc, Er–Lu), where these complexes are all mononuclear.

Original language	English
Article number	2024
Journal	Molecules
Volume	27
Issue number	6
DOIs	https://doi.org/10.3390/molecules27062024
Publication status	Published - 1 Mar 2022

Keywords

crystal structure
eight coordinate complex
hydroxy group
nitrate complex
scandium complex

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10.3390/molecules27062024

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title = "The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands",

abstract = "The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements and compare the coordination numbers and coordination geometries adopted. The steric and electronic properties of the coordinated ligands have a major influence on the structures adopted. We report the synthesis and crystal structure determination of an unusual dinuclear scandium complex [(bipy)(NO3)2Sc(µ-OH)2Sc(NO3)2 (bipy)] obtained by the reaction of hydrated scandium nitrate with 2,2′-bipyridyl (bipy) in either ethanol or nitromethane. The crystal structure of the complex shows that the scandium centers are eight coordinate, and the structure obtained contrasts with related complexes found in the lanthanide series [Ln(bipy)2 (NO3)3 ] and [Ln(phen)2 (NO3)3 ] (phen = phenanthroline) and in [M(terpy)(NO3)3 ] (M = Sc, Er–Lu), where these complexes are all mononuclear.",

keywords = "crystal structure, eight coordinate complex, hydroxy group, nitrate complex, scandium complex",

author = "Cotton, {Simon A.} and Raithby, {Paul R.} and Stephanie Schiffers and Teat, {Simon J.} and Warren, {John E.}",

note = "Funding Information: The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands † Funding Information: We are grateful to the Engineering and Physical Sciences Research Council (UK) for a studentship to SS (EP/D072859/1) and for a Senior Fellowship to PRR (EP/D072859/1). We thank Louise Slope for obtaining the infrared spectrum. Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Cotton, Simon A.

AU - Raithby, Paul R.

AU - Schiffers, Stephanie

AU - Teat, Simon J.

AU - Warren, John E.

N1 - Funding Information: The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands † Funding Information: We are grateful to the Engineering and Physical Sciences Research Council (UK) for a studentship to SS (EP/D072859/1) and for a Senior Fellowship to PRR (EP/D072859/1). We thank Louise Slope for obtaining the infrared spectrum. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/3/1

Y1 - 2022/3/1

N2 - The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements and compare the coordination numbers and coordination geometries adopted. The steric and electronic properties of the coordinated ligands have a major influence on the structures adopted. We report the synthesis and crystal structure determination of an unusual dinuclear scandium complex [(bipy)(NO3)2Sc(µ-OH)2Sc(NO3)2 (bipy)] obtained by the reaction of hydrated scandium nitrate with 2,2′-bipyridyl (bipy) in either ethanol or nitromethane. The crystal structure of the complex shows that the scandium centers are eight coordinate, and the structure obtained contrasts with related complexes found in the lanthanide series [Ln(bipy)2 (NO3)3 ] and [Ln(phen)2 (NO3)3 ] (phen = phenanthroline) and in [M(terpy)(NO3)3 ] (M = Sc, Er–Lu), where these complexes are all mononuclear.

AB - The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements and compare the coordination numbers and coordination geometries adopted. The steric and electronic properties of the coordinated ligands have a major influence on the structures adopted. We report the synthesis and crystal structure determination of an unusual dinuclear scandium complex [(bipy)(NO3)2Sc(µ-OH)2Sc(NO3)2 (bipy)] obtained by the reaction of hydrated scandium nitrate with 2,2′-bipyridyl (bipy) in either ethanol or nitromethane. The crystal structure of the complex shows that the scandium centers are eight coordinate, and the structure obtained contrasts with related complexes found in the lanthanide series [Ln(bipy)2 (NO3)3 ] and [Ln(phen)2 (NO3)3 ] (phen = phenanthroline) and in [M(terpy)(NO3)3 ] (M = Sc, Er–Lu), where these complexes are all mononuclear.

KW - crystal structure

KW - eight coordinate complex

KW - hydroxy group

KW - nitrate complex

KW - scandium complex

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SN - 1420-3049

VL - 27

JO - Molecules

JF - Molecules

IS - 6

M1 - 2024

ER -

The Synthesis and Structure of a Scandium Nitrate Hydroxy-Bridged Dimeric Complex Supported by Bipyridyl Ligands

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Keywords

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