Studien über äther‐artige Verbindungen, XI. Mitteil.: Über ein Ätherlacton mit Siebenring

Palomaa, M. H.; Toukola, Unt.

doi:10.1002/cber.19330661104

Cited by 6 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The extent of the present data is not sufficient to more than point to some unusual effects with the /3-halogen propionates. The work of Palomaa (92), where an acid chloride was treated with ethylene chlorohydrin in dioxan (see section X), shows the effect of an -OR group, for which in passing to higher alkyl radicals the reactivity increased as in the case of the esters shown in table 8. The decreasing effect of a methylene group is found again for the last two compounds in this section.…”

Section: The Effect Of Structure On the Rate Of Reactionmentioning

confidence: 99%

“…There is an apparent inconsistency in the effect due to the C6H6-and CH3COOgroupings in the work of Conant and Clarke. Of particular interest to theoretical considerations is the reactivity of carbonyl chloride, or phosgene, in the work of Palomaa (92), in which the replacement of a methyl group in acetyl chloride by a chlorine atom increases greatly the reactivity of the chlorine atom in the resulting compound, carbonyl chloride. So far only the effects of the carboxyl and carbonyl groups when they are adjacent to the methylene carbon atom have been studied.…”

Section: The Effect Of Structure On the Rate Of Reactionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Structure on the Reactivity of Some Organic Halogen Compounds.

Wilson¹

1935

Chem. Rev.

View full text Add to dashboard Cite

Laws that govern the reactivity of organic compounds are still unknown, although countless studies have been made on the various phases of isolated systems. On account of the important r81e of organic halogen compounds in organic synthesis there has been a never-ceasing endeavor to learn the laws governing the reactivity of this group. Up to the present time the rates of reaction can be predicted in only a few cases.Thermodynamics has given much information on the free energy and heat of combustion of organic compounds, but for the halogen compounds the available data of this type are of doubtful reliability; however, there is every reason to anticipate that reliable data will be available in the near future. The free energy and the heat of combustion data have aided little in solving the question of the time which a reaction will require to reach equilibrium. For a solution of this question theoretical speculation is directed toward the energy of activation. There is no general law known for the calculation of the energy of activation. From temperature coefficient data values of the energy of activation are calculated, but such values are restricted to the experimental accuracy of the data. These values of the energy of activation sometimes differ from the values obtained from spectroscopic data. This disparity of values emphasizes the possibility that energy factors other than the energy of activation may be entering into the values obtained. It has not been proven that the actual energy required to break the bond is the same as the energy of activation, and so far theory has not taken this factor into account. Nor have the number of degrees of freedom among which the energy must be distributed before reaction may occur been taken out from the realm of speculation. It is not surprising, therefore, that so little has been known about the fundamental nature of the reactivities of compounds.

show abstract

Section: The Effect Of Structure On the Rate Of Reactionmentioning

confidence: 99%

Section: The Effect Of Structure On the Rate Of Reactionmentioning

confidence: 99%

The Effect of Structure on the Reactivity of Some Organic Halogen Compounds.

Wilson¹

1935

Chem. Rev.

View full text Add to dashboard Cite

show abstract

Heats and Entropies of Polymerization, Ceiling Temperatures, Equilibrium Monomer Concentrations, and Polymerizability of Heterocyclic Compounds

Léonard

1999

The Wiley Database of Polymer Properties

View full text Add to dashboard Cite

Studien über äther‐artige Verbindungen, XII. Mitteil.: Zur Bestimmung der Geschwindigkeit der Acetal‐Hydrolyse

Palomaa

Salonen

1934

Ber. dtsch. Chem. Ges. A/B

View full text Add to dashboard Cite

Palornaa,. S a l o n e n : Studien [Jahrg. 67 [ a ] : in Wasser, kurz nach der Auflosung == (0 54°xo.9050):(0.5 xo.018~ x 1.00) = -53.7O. ax nach 70 Stdn. = -0.68O, [x]E = -67.6O (Gleichgewichts-Wert). Wird das Dimethyl-anhydro-methylhexosid mit 2-n. S a l z s a u r e auf dem Wasserbade 2 Stdn. erwarmt, die Saure nachher rnit Natriumacetat neutralisiert, p -N i t r op h e n y l -h y d r a z i n und Eisessig zugesetzt und weiter erwarmt, so beginnt die -1bscheidung eines Osazons schon nach wenigen Minuten. Das Produkt lie13 sich nicht reinigen. Es lost sich in Alkalien mit indigo-blauer Farbe, was fiir Nitrophenyl-osazone bezeichnend ist. Das Rohprodhkt enthalt indessen nur 1.7 % OCH,, wahrend ein Dimethyl-chlorhexose-Nitrophenyl-osazon 12 .r5, die entsprechende Monomethyl-Verbindung 6.5 yo verlangen wurde. Aus dem Aceto-anhydro-broniglucose von R e i c h e l und E r d o s 3 ) wurde, darch Schiitteln der Verbindung mit absol. Methanol und trocknem Silbercarbonat bis ziim Verschwinden des Broms aus der I,osung, ein nicht krystallisierendes 01 erhalten, das nach langerem Aufbewahren im Exsiccator zu einer glasartigeii Masse erstarrte. Auch Inipfen mit dem pit krystallisierenden Di a ce t yl-an h y d r op -m e t h y l h e x o s i d fiihrte keine Krystallisation herbei. Der Rockefeller F o u n d a t i o n sei fur die gewahrte Research Fellowship auch an dieser Stelle ergebenst gedankt. 86. M. H. P a 1 o m a a und A i n i S a 1 on e n : Studien iiber ather-artige

show abstract

Studien über äther‐artige Verbindungen, XI. Mitteil.: Über ein Ätherlacton mit Siebenring

Cited by 6 publications

References 11 publications

The Effect of Structure on the Reactivity of Some Organic Halogen Compounds.

The Effect of Structure on the Reactivity of Some Organic Halogen Compounds.

Heats and Entropies of Polymerization, Ceiling Temperatures, Equilibrium Monomer Concentrations, and Polymerizability of Heterocyclic Compounds

Studien über äther‐artige Verbindungen, XII. Mitteil.: Zur Bestimmung der Geschwindigkeit der Acetal‐Hydrolyse

Contact Info

Product

Resources

About