Hexyl groups

The alkyl group shown m step 1 is named as a substi tuted hexyl group... 

Assign a basis name according to the number of carbons in the corresponding unbranched alkane. Drop the ending -ane and replace it by -y/. The alkyl group shown in step 1 is named as a substituted hexyl group. 

Figure 10.12 (a) Prismane structure of [Ge6 CH(SiMej)2)6l (for clarity only the ipso C atoms of the R groups are shown), (b) The tetracycio structure of [GegBugBrj] with only the ipso C atoms of the Bu groups shown, (c) The cubane structure of [Geg(CMeEt2>g] again with only the ipso C atoms of the t-hexyl groups shown. 

Two hydrophobized polymers, MA-DP-A20 (phenyl group grafted in 20 mol%) and MA-DP-H68 (hexyl group grafted in 68 mol%), were selected for the evaluation of the interaction between polymers and cell membranes... 

Cyanex 923 contains a mixture of rc-octyl and rc-hexyl groups and Cyanex 925 a mixture of normal and branched octyl groups. 

HEXYL BROMIDE. Intermediate, for introduction of hexyl group. 

Case (A) was a simple solution of ZDDP with the mixture of secondary propyl and hexyl groups. 

Because the hydrogen atom and phenyl group migrate so readily, the reactions of / -dicarbonyl enolates with ethynyl- and (phenylethynyl)iodonium salts can be expected to result in alkynylation. It has already been noted that the 2- -hexyl-l,3-indandionate ion undergoes alkynylation with (phenylethynyl)phenyliodonium tetrafluoroborate (equation 43), despite the availability of the -hexyl group for [2 + 3] annulation. Ethynylations of six / -dicarbonyl enolates and the anion of 2-nitrocyclohexane with ethynyl(phenyl)-iodonium tetrafluoroborate in THF have also been reported27. For example, admixture of the ethynyliodonium salt and the anion of ethyl 2-cyclopentanone-l-carboxylate in THF affords the 1-ethynyl derivative in 71% isolated yield (equation 124)27. 

The successful result of Murai et al. [49] is shown in (Eq. 26). When 1-trimethylsilylpropyne is used, the desired coupling product is obtained in excellent yield and the regiochemical and stereochemical outcome is perfect [49]. The E isomer is the predominant product. This result indicates that the addition of C-H bonds to the C-C triple bond proceeds with syn selectivity. In the case of the reaction with 1-trimethylsilyl-l-octyne, stereoselectivity is slightly decreased. This suggests that the small difference in steric bulkiness between methyl and hexyl groups affects the stereoselectivity. 

Another name for dec-3-yne is ethyl n-hexyl acetylene. It can be made by adding an ethyl group and a hexyl group to acetylene. This can be done in either order. We begin by adding the hexyl group. 

Show the reagents and intermediates involved in the other order of synthesis of dec-3-yne, by adding the ethyl group first and the hexyl group last. 

In comparison with that of compound 175, the energy barriers toward coplanar conformations increase, and the equilibrium torsion angle becomes larger in the torsion potential curve of compound 181, around 85°. The thiophene rings are even more twisted by cyclohexyl groups than by hexyl groups. 

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