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Conformation of cyclobutane

FIGURE 3.11 Nonpl anar ("puckered") conformation of cyclobutane. The nonplanar conformation avoids the eclipsing of bonds on adjacent carbons that characterizes the planar conformation. [Pg.115]

Figure 4.5 The conformation of cyclobutane. Part (c) is a Newman projection along the C1-C2 bond, showing that neighboring C—H bonds are not quite eclipsed. Figure 4.5 The conformation of cyclobutane. Part (c) is a Newman projection along the C1-C2 bond, showing that neighboring C—H bonds are not quite eclipsed.
Figure 4.11 (a) The folded or bent conformation of cyclobutane, (b) The bent or envelop form of cyclopentane. In this structure the front carbon atom is bent upward. In actuality, the molecule is flexible and shifts conformations constantly... [Pg.153]

Problem 9.10 Depict the flexible puckered conformation of cyclobutane in a Newman projection. [Pg.172]

Most stable folded conformation of cyclobutane H atoms are not eclipsed... [Pg.40]

Exercise 12-14 Given the favored nonplanar conformation of cyclobutane (Figure 12-15), predict whether c/ s-1,2-dibromocyclobutane will be more, or less, stable than the corresponding trans isomer. Do the same for the c/s- and trans-1,3-dibromocyclo-butanes. Give your reasoning. [Pg.463]

The conformation of cyclobutane is slightly folded. Folding gives partial relief from the eclipsing of bonds, as shown in the Newman projection. Compare this actual structure with the hypothetical planar structure in Figure 3-14. [Pg.112]

Conformations of Cyclobutane and Cyclopentane Conformations of Cyclohexane 127 Axial and Equatorial Bonds in Cyclohexane 129 Conformational Mobility of Cyclohexane 131 Conformations of Monosubstituted Cyclohexanes Conformational Analysis of Disubstituted Cyclohexanes Boat Cyclohexane 140 Conformations of Polycyclic Molecules 141... [Pg.5]

The question of planarity of cyclobutane systems has been studied by Lambert and Roberts (1963). If two puckered conformations of cyclobutane exist then a substituent R has two possible environments, pseudo-axial and equatorial to the ring ... [Pg.256]

TABLE 3.10 Results of Molecular Mechanics Calculations on Two Conformations of Cyclobutane ... [Pg.172]

Cyclic alkanes undergo pseudorotation because rotation by 360° is not possible. Pseudorotation in cyclic alkanes leads to many conformations. Cyclopropane is planar, with relatively weak banana bonds. The lowest energy conformation of cyclobutane is a puckered conformation. The lowest energy conformation of cyclopentane is an envelope conformation. The lowest energy conformation of cyclohexane is an equilibrating mixture of two chair conformations. [Pg.297]

Aspects of cycloalkane conformational analysis. A. The two puckered conformations of cyclobutane. Note how the substituents (X and Y) exchange positions when puckered forms interconvert. B. Left The envelope form of cyclopentane—the conformer contains a mirror plane in the plane of the page. Right The half-chair form of cyclopentane, looking down the two-fold rotation axis. [Pg.101]


See other pages where Conformation of cyclobutane is mentioned: [Pg.171]    [Pg.195]    [Pg.167]    [Pg.5]    [Pg.145]    [Pg.167]    [Pg.125]    [Pg.125]    [Pg.145]    [Pg.178]    [Pg.167]    [Pg.125]    [Pg.89]    [Pg.369]    [Pg.126]    [Pg.92]   
See also in sourсe #XX -- [ Pg.369 ]




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Conformation cyclobutane

Conformations of Cyclobutane and Cyclopentane

Cyclobutanation

Cyclobutane

Cyclobutanes

Cyclobutanes conformation

Cyclobutanes conformation of derivatives

Puckered, conformation of cyclobutane

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