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Updated: Apr 28, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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コメント "合成ヘテロダイマー系における興奮状態の間の整合性を設計する"

Alexei Halpin1, Philip J M Johnson1, R J Dwayne Miller2

  • 1Institute for Optical Sciences and Departments of Chemistry and Physics, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.

Science (New York, N.Y.)
|June 7, 2014
PubMed
まとめ

この研究は,分子ヘテロダイマーにおける電子的相関性の解釈に疑問を投げかけています. 実験の矛盾は,観察された動態は,長期の相関関係に信頼性があるとは言えないことを示唆している.

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Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
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Selection Rules: Photochemical Activation
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The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
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