Gamma gauche substituent effects are often used as stereochemical probes in 13C NMR, but empirical force field calculations suggest that such applications ... |
The 13C NMR method is based on the so-called “γ-gauche effect,” which attributes upfield shifts of carbons to steric compression resulting from gauche ... |
The γ-gauche effect has recently been employed in measuring the backbone and side chain conformations of proteins [5,6,7,8]. Ab initio calculations of NMR ... |
12 июн. 2018 г. · The γ-gauche effect is best described by stereoelectronic interactions, especially those of the sulfur's lone pair with antibonding orbitals to a β-carbon in ... |
The ¹³C NMR of Catharine is reported. A temperature-dependent study of the ¹H NMR of Catharine indicates that it exists as two conformers at room temperature. |
The data constitute the first example of downfield effects exerted by sulphur on both gauche and antiperiplanar γ-carbons. The γ-gauche effect of sulphur ... |
22 окт. 2024 г. · Our results indicate that distortions in molecular structure due to steric effects can result in bond stretching or compression or in angular distortions. |
In the study of conformational isomerism, the gauche effect is an atypical situation where a gauche conformation is more stable than the anti conformation ... |
Deshielding y-gauche effects in 13C magnetic resonance: a comparison of the conformational behaviour of the acetyl group in cyclohexane and. 5-substituted-1 ... |
| Novbeti > |
| Axtarisha Qayit Anarim.Az Anarim.Az Sayt Rehberliyi ile Elaqe Saytdan Istifade Qaydalari Anarim.Az 2004-2023 |