不要严酷
发表于 2025-3-25 05:17:03
Stereochemical Considerations,ic effects are also important in proton spectroscopy, the superposition of both bimolecular and intramolecular interactions makes partitioning of these effects difficult. On the other hand, the chemical shift of carbons (except those bearing polarizable groups such as iodides or carbonyl groups) are
incite
发表于 2025-3-25 11:18:20
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Narrative
发表于 2025-3-25 12:08:41
Bicycloheptanes,C-7, and syn and anti used for C-7 substituents. For 7-monosubstituted compounds, the numbering is defined so that the substituent will be syn. Relatively unusual dihedral angles are found about most of the bonds and thus caution should be exercised in applying Δδ effects observed here to other syst
conjunctiva
发表于 2025-3-25 18:49:43
Bicyclooctanes,htforward system, published elsewhere, that is depicted schematically above. Briefly, a sense of rotation (clockwise or counterclockwise) is defined for an axis that passes through both bridgehead atoms based upon the ordering of assigned numbers for the atoms adjacent to atom 1. Substituents that a
MITE
发表于 2025-3-25 20:42:50
Bicycloheptanes,rientation of groups relative to the unique, smallest bridge. The M/G system defined in Chapter 6 for the bicyclooctanes is equally applicable here. Briefly, a sense of rotation (clockwise or counterclockwise) is defined for an axis that passes through both bridgehead atoms based upon the ord
效果
发表于 2025-3-26 02:03:44
Bicyclononanes and Tricyclodecanes,red, three-carbon bridge. Adamantanes, or tricyclodecanes, can serve as quite useful models for chair cyclohexane rings that have no conformational freedom. For C-2 monosubstituted compounds, the lower numbered ring has the substituent axial while C-7, C-8, and C-10 are anti to the substit
过剩
发表于 2025-3-26 05:11:50
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纹章
发表于 2025-3-26 08:50:10
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nuclear-tests
发表于 2025-3-26 15:15:10
Spirocyclics, the bicyclooctanes where literature schemes were found to be inadequate, we have defined a new system. Quite simply, groups in each ring are defined as M (mit) if they are oriented towards the lower numbered of the two atoms of the other ring immediately adjacent to the junction; otherwise t
协定
发表于 2025-3-26 18:18:57
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