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Flexible steric bulk of sugar wingtip substituents on bis(N-heterocyclic carbene) ligands of diplatinum complexes via chair–twist-boat conformational changes.

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Title: Flexible steric bulk of sugar wingtip substituents on bis(N-heterocyclic carbene) ligands of diplatinum complexes via chair–twist-boat conformational changes.
Authors: Nomura, Shuhei1 (AUTHOR), Kobayashi, Itsuki1 (AUTHOR), Doe, Matsumi2 (AUTHOR), Tanaka, Rika2 (AUTHOR), Nagasawa, Tamaki2 (AUTHOR), Nishioka, Takanori1 (AUTHOR) nishioka@omu.ac.jp
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 2/24/2026, Vol. 55 Issue 8, p3542-3550. 9p.
Subjects: Steric hindrance, Conformational analysis, Grignard reagents, Ligands (Chemistry), Metal complexes
Abstract: In the p-toluenethiolate-bridged diplatinum complex bearing ethylene-bridged bis(N-heterocyclic carbene) ligands, all four acetyl-protected glucopyranosyl wingtip substituents adopt the chair conformation, giving rise to an open structure around the Pt2S2 core that allows the complex to react with a Grignard reagent. In contrast, in the corresponding diplatinum complex with o-xylene-bridged bis(N-heterocyclic carbene) ligands, two of the four acetyl-protected glucopyranosyl groups adopt the twist-boat conformation to relieve the steric repulsion among the wingtip N-substituents, resulting in a covered structure around the Pt2S2 core that inhibits reaction with a Grignard reagent. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 191799446
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  Label: Title
  Group: Ti
  Data: Flexible steric bulk of sugar wingtip substituents on bis(N-heterocyclic carbene) ligands of diplatinum complexes via chair–twist-boat conformational changes.
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  Data: <searchLink fieldCode="AR" term="%22Nomura%2C+Shuhei%22">Nomura, Shuhei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kobayashi%2C+Itsuki%22">Kobayashi, Itsuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Doe%2C+Matsumi%22">Doe, Matsumi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tanaka%2C+Rika%22">Tanaka, Rika</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nagasawa%2C+Tamaki%22">Nagasawa, Tamaki</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nishioka%2C+Takanori%22">Nishioka, Takanori</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nishioka@omu.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Dalton+Transactions%3A+An+International+Journal+of+Inorganic+Chemistry%22">Dalton Transactions: An International Journal of Inorganic Chemistry</searchLink>. 2/24/2026, Vol. 55 Issue 8, p3542-3550. 9p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Steric+hindrance%22">Steric hindrance</searchLink><br /><searchLink fieldCode="DE" term="%22Conformational+analysis%22">Conformational analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Grignard+reagents%22">Grignard reagents</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Chemistry%29%22">Ligands (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+complexes%22">Metal complexes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In the p-toluenethiolate-bridged diplatinum complex bearing ethylene-bridged bis(N-heterocyclic carbene) ligands, all four acetyl-protected glucopyranosyl wingtip substituents adopt the chair conformation, giving rise to an open structure around the Pt2S2 core that allows the complex to react with a Grignard reagent. In contrast, in the corresponding diplatinum complex with o-xylene-bridged bis(N-heterocyclic carbene) ligands, two of the four acetyl-protected glucopyranosyl groups adopt the twist-boat conformation to relieve the steric repulsion among the wingtip N-substituents, resulting in a covered structure around the Pt2S2 core that inhibits reaction with a Grignard reagent. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1039/d6dt00111d
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        Text: English
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        PageCount: 9
        StartPage: 3542
    Subjects:
      – SubjectFull: Steric hindrance
        Type: general
      – SubjectFull: Conformational analysis
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      – SubjectFull: Grignard reagents
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      – SubjectFull: Ligands (Chemistry)
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      – TitleFull: Flexible steric bulk of sugar wingtip substituents on bis(N-heterocyclic carbene) ligands of diplatinum complexes via chair–twist-boat conformational changes.
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            NameFull: Nomura, Shuhei
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            NameFull: Kobayashi, Itsuki
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            NameFull: Doe, Matsumi
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            NameFull: Tanaka, Rika
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            NameFull: Nagasawa, Tamaki
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            – D: 24
              M: 02
              Text: 2/24/2026
              Type: published
              Y: 2026
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