Baeyer theory

See Fieser, L. F., and Fieser, M.x Organic Chemistry, 3rd ed., p. 529 for an explanation of Armstrong-Baeyer theory. New York Reinhold Publishing Coip. 1956. 

Although better known now for his incorrect theory that cycloalkanes were planar Baeyer was responsible for notable advances in the chemistry of organic dyes such as indigo and was awarded the 1905 Nobel Prize in chemistry for his work in that area... 

Baeyer strain theory (Section 3 4) Incorrect nineteenth century theory that considered the nngs of cycloalkanes to be planar and assessed their stabilities according to how much the angles of a corresponding regular polygon devi ated from the tetrahedral value of 109 5°... 

Phenolic resins were the first totally synthetic plastics invented. They were commercialized by 1910 [I]. Their history begins before the development of the structural theory of chemistry and even before Kekule had his famous dreams of snakes biting their tails. It commences with Gerhardt s 1853 observations of insoluble resin formation while dehydrating sodium salicylate [2]. These were followed by similar reports on the behavior of salicylic acid derivatives under a variety of reaction conditions by Schroder et al. (1869), Baeyer (1872), Velden (1877), Doebner (1896 and 1898), Speyer (1897) and Baekeland (1909-1912) [3-17]. Many of these early reports appear to involve the formation of phenolic polyesters rather than the phenol-aldehyde resins that we think of today. For... 

The Baeyer strain theory is useful to us in identifying angle strain as a destabilizing effect. Its fundfflnental flaw is its assumption that the rings of cycloalkanes are planar-. With the exception of cyclopropane, cycloalkanes are nonplanar. Sections 3.5-3.13 describe the shapes of cycloalkanes. We ll begin with cyclopropane. 

Woker attempts to apply this strain theory to ring compounds, and considers that the five carbon atom ring produces less strongly odoured substances than any other and points out that, according to Baeyer s strain theory, the five carbon ring has the least internal tension. It is very doubtful if this contention is correct, since the penta-methylenes do not seem to be less strongly odoured than other polymethylene ring compounds. ... 

The data in Figure 4.3 show that Baeyer s theory is only partially correct. Cyclopropane and cyclobutane are indeed strained, just as predicted, but cyclopentane is more strained than predicted, and cyclohexane is strain-free. Cycloalkanes of intermediate size have only modest strain, and rings of 14 carbons or more are strain-free. Why is Baeyer s theory wrong ... 

Backbone (protein), 1028 Backside displacement. reaction and.363-364 von Baeyer, Adolf, 113 Baeyer strain theory, 113-114 Bakelile, structure of, 1218 Banana, esters in, 808 Barton, Derek, H. R., 389 Basal metabolic rate, 1169 Basal metabolism. 1169-1170 Base, Bronsted-Lowry, 49 Lewis, 57, 59-60 organic, 56-57 strengths of, 50-52 Base pair (DNA), 1103-1105 electrostatic potential maps of. 

Figure 3, together with Statement 6, clarifies some surprising results from different studies on strained ring compounds and culminates in the conclusion that Baeyer s theory is valid only for silicon rings [2],... 

While correlating the stability of the ring with their size Adolf von Baeyer advanced in 1885 his famous strain theory. We know that the four valencies of a carbon atom go to the four comers... 

Finally Baeyer s theory is based on a mechanical concept of valency and served its purpose in stimulating research in the field of cyclic compounds. Now we have the electronic theory and the reactivity of olefines has been attributed to the n electrons and not on the basis of strains. 

Baeyer strain theory org chem The theory that the relative stability of penta- and hexamethylene ring compounds is caused by a propitious bond angle between carbons and a lack of bond strain. ba-or stran, the-3-re baking soda See sodium bicarbonate. bak-ir, sod-s ... 

Density functional theory has been used to model the Baeyer-Villiger reaction mechanism for Ti(IV)-H202 and Sn(IV)-H202 systems. These calculations have shown... 

Introduction Baeyer Strain Theory The Origin and T3fpes of Strain. 718... 

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