Heptyl equations

Fig. Ill-IS. Surface tension data for aqueous alcohol illustration of the use of the Gibbs equation. (1) -butyl (2) -amyl (3) -hexyl (4) -heptyl (5) -octyl. (Data from Ref. 126).

Referring to Fig. IV-4, the angles a and /3 for a lens of isobutyl alcohol on water are 42.5° and 3°, respectively. The surface tension of water saturated with the alcohol is 24.5 dyn/cm the interfacial tension between the two liquids is 2.0 dyn/cm, and the surface tension of n-heptyl alcohol is 23.0 dyn/cm. Calculate the value of the angle 7 in the figure. Which equation, IV-6 or IV-9, represents these data better Calculate the thickness of an infinite lens of isobutyl alcohol on water. 

Heptyl perfluoroalkyltluoroacetate reacts with secondary amines such as piperidine Acid hydrolysis of the product yields hydrates of heptyl perfluoro-alkanoylfluoroacetate [14] (equation 15)... 

For reaction 3 to replace an oxygen with a methylene group to form a primary alcohol, there are enthalpies of formation for only seven alcohols to compare with the nineteen hydroperoxides, almost all of them only for the liquid phase. The enthalpies of the formal reaction are nearly identical, —104.8 1.1 kJmol, for R= 1-hexyl, cyclohexyl and ferf-butyl, while we acknowledge the experimental uncertainties of 8.4 and 16.7 kJmol, respectively, for the enthalpies of formation of the secondary and tertiary alcohols. We accept this mean value as representative of the reaction. For R = 1- and 2-heptyl, the enthalpies of reaction are the disparate —83.5 and —86.0 kJmol, respectively. From the consensus enthalpy of reaction and the enthalpy of formation of 1-octanol, the enthalpy of formation of 1-heptyl hydroperoxide is calculated to be ca —322 kJ mol, nearly identical to that derived earlier from the linear regression equation. The similarly derived enthalpy of formation of 3-heptyl hydroperoxide is ca —328 kJmol. The enthalpy of reaction for R = i-Pr is only ca —91 kJmol, and also suggests that there might be some inaccuracy in its previously derived enthalpy of formation. Using the consensus enthalpy of reaction, a new estimate of the liquid enthalpy of formation of i-PrOOH is ca —230 kJmoU. ... 

Problem 7.30 Write equations for and explain the use of tetrabutyl ammonium chloride, BUjN Cl, to facilitate the reaction between 1-heptyl chloride and cyanide ion. 

Heptyl-6,8-dihydroxy-7-methylisochromenylium 2,2,2-trifluoroacetate 109 can be oxidized using ortho- ioAobenzo ic acid (IBX) to afford the azaphilone nucleus 110 in high yield (Equation 52) <2004AGE1239>. 

This equation was used in the assignment of conformation and structure of some benzobicyclo[4.1.0]heptyl cations and it was concluded that the bisected conformation was favored for several model compounds, and for a reported example originally assigned... 

Generation of a diazonium intermediate (619) from nitrosourea (618) gave products, which are derived from intermediate 620 (equation 161). Surprisingly, in this special case the C(l)-C(2)-bond of the cyclopropane was cleaved. In contrast, diazonium species of a 3-oxa-bicyclo[4.1.0]heptyl or 3,5-dioxabicyclo[5.1.0]octyl system decomposed via an... 

The side chain of Katsuki s esters (25) turned out less innocent in these rearrangements than its location outside of the cyclic transition state suggests. In fact, an appropriately placed oxygen atom in the side chain of such esters (32 equation 13) can steer the double bond geometry of the reaction product. Compare, for example, the stereochemically complementary results reported for ester (25 side chain = -heptyl) and (32a side chain = BnOCHa). With ZrCpaCh as additive, the first reaction is 99% cis... 

CM-2,6-dialkyl-2//,6/f-l,3,5-oxaselenazines (237) are synthesized from selenoamides, aldehydes (236 R = methyl, heptyl, or t-butyl), and boron trifluoride etherate (Equation (56)) <90CL913>. 

The reactions between allylic magnesium chlorides and diphenyl alkyl phosphates (PhO)2P(0)OR, where R = Me, CH2Ph, or CH2CH=CHR (R = Pr or heptyl, for example) are remarkably regiospecific. The reaction is exemplified in equation 9, and the yields are reported to be within the range 60-99% with the y < ratios between 92 8 and 99 1. 

Heptyl Acetate and An l Acetate Linear Regression Equations... 

Terao and Kambe reported a rather unconventional use of 1,3-butadiene as an additive, which affects palladium- and nickel-catalyzed cross-couplings of alkyl bromides and tosylates [14]. In the presence of 50mol% of 1,3-butadiene and a catalytic amount of [Pd(acac)2], the cross-coupling of heptyl tosylate with 4-chlorophenylmagnesium bromide was achieved to give the corresponding arylation product in excellent yield (Equation 5.12). 

As an example, the results when the ILSB is made of W-heptyl-W-methylpyrro-lidinium bis(pentafluoroethanesulfonyl)amide, [Ci 7pyrr ][C2C2N ], are shown in Figs. 4.2.1 and 4.2.2. The concentration of HBr in phase V (M2X ) was changed from 5 pmol kg to 2 mol kg whereas the composition of phase 111 was kept constant at 10 mmol dm chloride salt of Ci jpyrr (MiX). The latter salt was chosen to lower the electrochemical polarizability of the interface between 111 and V [31] and fix the phase-boundary potential across the interface between 111 and IV at a value determined by the Nemst equation for the partition of Ci ypyrr" between 111 and IV [22]. 

If both the ester and the acid chains are of sufficient length (ethyl butanoate or larger), the hydrogen rearrangements of Equations 9.32 and 9.34 can occur consecutively these characteristic ions will appear at w/z 60 and 61 if the acid s a-carbon atom is not substituted. n-Heptyl and homologous higher carboxylates characteristically yield a low abundance ion corresponding to the butyl ester (Meyerson et al. 1983). 

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