Titlebook: Stereochemical Analysis of Alicyclic Compounds by C-13 NMR Spectroscopy; James K. Whitesell,Mark A. Minton Book 1987 Chapman and Hall Ltd

不要嚴(yán)酷

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

Narrative

Bicyclo[2.2.1]heptanes,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

Bicyclo[2.2.2]octanes,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

Bicyclo[3.1.1]heptanes,rientation of groups relative to the unique, smallest bridge. The M/G system defined in Chapter 6 for the bicyclo[2.2.2]octanes 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

Bicyclo[3.3.1]nonanes and Tricyclo[3.3.1.13,7]decanes,red, three-carbon bridge. Adamantanes, or tricyclo[3.3.1.1.]decanes, 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

過剩

紋章

nuclear-tests

Spirocyclics, the bicyclo[2.2.2]octanes 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

協(xié)定