Staggered, definition

As a final example, we consider the relative stability of the torsional isomers of 2-butene. The six conformations of 2-butene are shown below along with the definitions to be used in the discussion, e.g. the label Css refers to the cis isomer where the in plane hydrogens of the methyl groups are staggered relative to the double bond. 

Fig. 6. Definition of STERIMOL parameters as for the 2-pentyl group having fully extended staggered conformation...

Definite mental confusion, considerable incoordination and staggering gait There may be complaints of nausea and nervousness many suffer headache... 

Fig. 8. Definition of the stagger angle in linear metallocenes. Perfect staggering occurs at an angle of 36°.

Staggered Axial Velocity Component (w) Grid Cell Definition The location of the different points in the z-direction are calculated as follows, for i > 1 ... 

Staggered Radial Velocity Component (v) Grid Cell Definition The axial position of the grid cell for the radial velocity component v) coincides with that of the scalar grid cell defined above. 

Figure 7.11. Terminology definitions for hydroboration transition structures [141] (a) The auxiliary may be either syn or anti to the alkene substituents, but anti to the substituent (R) on the nearest carbon, (b) A stereocenter attached to boron, in a staggered conformation with respect to the forming C-B bond, has substituents in anti, inside, and outside positions, (c) Definition of the Large, Medium, and Small substituents of IpcBH2.

The experimental data in Table 3.1 show that the calculated values of total angle strain are approximately correct only for cyclopropane, cyclobutane, and cyclopentane. Cyclohexane is definitely not the strained compound Baeyer s theory predicts, and the larger ring compounds are also not very strained. Any chemist today can explain the discrepancy between these calculated and experimental values of strain energy cyclohexane is not planar. In either the chair or boat conformations (Figure 3.12), all bond angles can be approximately 109.5°. In the chair conformation of cyclohexane, all bonds are staggered, and there are no apparent van der Waals repulsions in the molecule. ... 

The most common crown ethers are shown in Fig. 22. Since application of lUPAC rules to polyethers leads to somewhat cumbersome designations, we will follow the simple crown nomenclature proposed by Pedersen Polyethers are built up from 1,4-dioxa units, O—CH —CH —O. The minimum energy conformation of these units is staggered with torsion angles about C-C bonds being synclinal (60°) and about C-O bonds being antiperiplanar ( 180 °C) (for definitions see Fig. 23). These preferences, however, do not preclude deviations if required by ring formation or cation complexation. 

Figure 3-5 shows that isotactic polymers in certain projections definitely do not have their substituents always on the same side as is frequently stated. Such an assumption is only correct for the two types of projections in the eclipsed conformation. In projections of trans-staggered conformations differences exist according to the monomeric unit. 

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