Decane, structure

NAME 1 - Aminotetr decane STRUCTURAL FORMULA CHj(CH2)l3NH2... 

Corse, J., B. J. Finkle, and R. E. Lundin Confirmation of the tricyclo-[6.2.0.03- ]decane structure for the photodimer of dimethyl 3-oxo-1.4-pentadiene-1.5-dicarboxylate. Tetrahedron Letters 1961, 1. 

More recently, the 1,4-disubstituted quinolizidine 275A was reassigned a 4-methyl-9-non)myl-l-azabicyclo[5.3.0]decane structure by comparison with synthetic diastereomers. Fig. (14) [16]. Nevertheless complete characterisation has not yet been reported. 

From our results at the higher temperature used (250°) and larger contact times (Figs. 7 and 10), the bicyclo[4.3.0]octane or perhydrindane structures seem to appear almost simultaneously and in constant ratios. Their thermodynamic stabilities must be rather close. Finally, and for the sake of completeness, the bicyclo[4.4.0]decane structure was added to the general scheme of Fig. 13, in spite of the fact that octalins have not yet been isolated from our CioHie isomerization mixtures. 

Reaction of substituted cyclooctadienes with a variety of electron-poor olefins (dienophiles) gives derivatives of the tricyclo[4.2.2.0 ]decane structure. Consider possible mechanisms for these reactions in light of the orbital sym--metry rules. 

Preparation of encfo-2,6-dimethoxy carbonyl-4-methylenetricyclo [5.2.1.0 ] decane (Structure 45)... 

It cannot be said at this stage exactly how great an excess of decane would be required in order to make Fig. 4.7d feasible. This would have to be established experimentally, but the size of the excess does not change the basic structure. 

One after the other, examine structures for octane-1,8-dioic acid, nonane-1,9-dioic acid djud decane-1,10-dioic acid. Is there any difference (in structure or conformation) between the diacids with lower and higher melting points Which, if any, of the acids adopt structures similar to that of acetic acid dimer Account for the variation in melting points of these three compounds. 

MD simulations also provide an opportunity to detect the structure of molecularly thin films. The most commonly known ordering structure induced by the confinement, the layering, has been revealed that the molecules are packed layer by layer within the film and the atoms would concentrate on several discrete positions. This has been confirmed in the simulations of liquid decane [29]. The density profile of unite atoms obtained from the simulations is given in Fig. 12 where two sharp density peaks appear at the locations near the walls, as a result of adsorption, while in the middle of the film smaller but obvious peaks can be observed on the density profile. The distance between the layers is largely identical to the thickness of the linear chain of decane molecules, which manifests the layered packing of molecules. 

Fig. 12—Density profile from simulations of liquid decane, the peaks in density and fluctuations across the film reveal the layering structure in thin films.

As the number of carbon atoms in the alkane increases, so does the number of possible stractural isomers. Thousands of different alkanes exist, because there are no limits on the length of the carbon chain. Regardless of the number of the chain length, alkanes have tetrahedral geometry around all of their carbon atoms. The structure of decane, Cio H22, shown in Figure 9-15. illustrates this feature. Notice that the carbon backbone of decane has a zigzag pattern because of the 109.5° bond angles that characterize the tetrahedron. 

Table 5 shows HDS product distributions over several catalysts prepared by using the molybdenum-nickel cluster 2. Sulfur content in decane was adjusted to 5.0 wt% in these experiments. MoNi/NaY was found to be more active than MoNi/Al203. It is to be noted that during the high temperature pretreatment the original cluster structure would have been changed. However, the high activity of the MoNi/NaY catalyst for benzothiophene HDS is probably due to the formation of active sites derived from this particular mixed metal cluster. 

If the C3-C7 separation of 1 is reduced by introduction of a smaller CH2 bridge, that is the dimethyl adamantanediol, 2,6-dihydroxy-2,6-dimethyltricyclo[3.3.1.1 3,7>]-decane (4), the host crystallises from ethyl acetate with a different, non-including, layer structure. The layers are comprised of orthogonal kinked strands as shown diagrammatically in Fig. 4(a), with the molecules connected along the strands and between the strands by cycles of four hydrogen bonds, as in Scheme 2. 

Fig. 4. Diagrammatic representation of layered crystal structures of rigid diols, with closed hydrogen bonding cycles. Open circles are oxygen atoms, filled circles hydrogen atoms, and the solid lines represent the connecting diol. Hydrogen bonds are shown as broken lines, (a) The structure of 2,6-dihydroxy-2,6-dimethyltricyclo[3.3.1.13,7]decane (4). (b) The structure of erafo-2,e do-6-dihydroxy-2,6-dimethylbicyclo[3.3.1]nonane, (7)...

Fig. 69.oNSE spectra of 2% diblock copolymer (d-PS and h-PI blocks) in deuterated n-decane. The Q/A-1 values are 0.026, V 0.032, 0.038, x 0.051, O 0.064, A 0.089, O 0.115. Experimental data and theoretical dynamic structure for breathing modes are compared (solid lines). (Reprinted with permission from [174]. Copyright 1993 The American Physical Society, Maryland)... 

Host-guest systems made from dendritic materials have potential in the areas of membrane transport and drug delivery [68, 84, 85]. In a recent report [136] Tomalia and coworkers investigated structural aspects of a series of PAM AM bolaamphiphiles (e.g., 50) with a hydrophobic diamino do decane core unit. Fluorescence emission of added dye (nile red) was significantly enhanced in an aqueous medium in the presence of 50 unlike the cases when 51 and 52 were added (Fig. 23). Addition of anion surfactants to this mixture generated supramolecular assemblies which enhanced their ability (ca.by 10-fold) to accommodate nile red (53). Further increase in emission was noted by decreasing the pH from the normal value of 11 for PAMAM dendrimers to 7. At lower pH values the... 

Photoelectron spectroscopy (PES) has been applied to determine the structure of 1-aza- and 1,4,7-triazatricy-clo[5.2.1.04,10]decane 37 and 40 <1997JMT(392)21>. The PES spectrum of ATQ shows four composite bands in the region 7-17 eV. A first band peaked at 7.80 eV is attributed to the NLPO (nitrogen lone-pair orbital). A second prominent broad band system, extending from 10.5 to 13.0 eV is associated with photoionizations from the cr-orbital manifold. The third composite band is produced by two photoemissions. The second band may be attributed to emissions arising from a sequence of seven near-lying MOs. 

Many researchers have reported the structure-thermal property correlations in LCPs from substituted hydroquinones (HQs) and dicarboxylic acids. Lenz and co-workers have investigated the liquid crystallinity of the polyarylates obtained from substituted HQs and terephthalic acid (TA) [6-10], substituted HQs and l,10-bis(phenoxy)decane-4,4/-dicarboxylic acid [8], and substituted HQs and a,oo-bis(phenoxy)alkane-4,4/-dicarboxylic acid [11], Kricherdorf and Schwarz [12] and Osman [13] reported the liquid crystallinity of the polyarylates obtained from substituted HQs and 1,4-cyclohexanedicarboxylic acid, while Krigbaum el al. [14], Heitz and co-workers [15] and Kricherdorf and Engelhardt [16] investigated the liquid crystallinity of the polyarylates synthesized from substituted HQs and substituted TAs. In addition, Jackson reported the liquid crystallinity and the moduli of fibers and injection molded specimens of the polyarylates... 

---