Cyclohexane, molecular structure

The molecular structure of benzene, C(,H(, is planar. Is the molecular structure of cyclohexane, C6HI2, planar as well ... 

The assessment of surfactant structures and optimal mixtures for potential use in tertiary flooding strategies in North Sea fields has been examined from fundamental investigations using pure oils. The present study furthermore addresses the physico-chemical problems associated with reservoir oils and how the phase performance of these systems may be correlated with model oils, including the use of toluene and cyclohexane in stock tank oils to produce synthetic live reservoir crudes. Any dependence of surfactant molecular structure on the observed phase properties of proposed oils of equivalent alkane carbon number (EACN) would render simulated live oils as unrepresentative. 

The crystal and molecular structure of [(n-C5H4SiMe3)Re(CO)3] has been determined. The molecule (100) appears to be a normal [(n-Cp)M(CO)3] system, and thus this structural study has not resolved the problem of the unusual n.m.r. spectrum exhibited by this compound in solution. [(n-Cp)2Rc2(CO)5] has been prepared by the u.v. irradiation of a cyclohexane... 

The compound Ru4(jt-H)4(CO)12 is obtained as a yellow air-stable powder, which is soluble in most organic solvents, but insoluble in water. The IR spectrum contains v(CO) bands at 2081 (s), 2067 (vs), 2030 (m), 2024(s), and 2009(w)cm-1 (cyclohexane solution) the HNMR spectrum has a resonance at <5 — 17.98 (CDC13 solution). The molecular structure of Ru4(/i-H)4(CO)12 has been determined by X-ray diffraction the four hydrogen atoms bridge the edges of the tetrahedral Ru4 core in a D2d arrangement, while three CO ligands are terminally bonded to each ruthenium.8 The deuterated complex Ru4(/i-D)4(CO)12 can be prepared in the same way if D2 is used in place of H2.6... 

The molecular structure of gaseous tetrahydropyran has been determined by electron diffraction the dimensions are presented in Figure 7 (79ACS(A)225). The molecule exists in the chair form with Cs symmetry consistent with the conclusions based on NMR, rotational and vibrational spectra. The torsional angles suggest that the heteroatom causes no flattening of the ring relative to that of cyclohexane. 

Cyclohexane Molecular formula C6H12 cyclic saturated ring structure with single bonds. 

The enhancement of the extraction of Ln(III) ions with ttfaH in cyclohexane or benzene by the addition of Cr(acac)3 was investigated . The equilibrium analysis suggested that the effect of Cr(acac)3 could be ascribed to the formation of a binuclear 1 1 La(ttfa)3-Cr(acac)3 adduct. The formation constants of adducts along the lanthanide series decreased with the decrease of the ionic radii among the light lanthanides and were constant for their heavy counterparts. UVV, IR and H NMR spectroscopic studies were also performed to explain the molecular structural differences between the light and heavy lanthanide complexes. 

Gasoline is a complex mixture of hydrocarbons that bods below 200°C (390°F). The hydrocarbon constituents in this boiling range are those that have four to twelve carbon atoms in their molecular structure. Gasoline varies widely in composition, even those with the same octane number may be quite different. For example, low-boiling distillates with high aromatics content (above 20 percent) can be obtained from some crude oils. The variation in aromatics content as well as the variation in the content of normal paraffins, branched paraffins, cyclopentanes, and cyclohexanes all involve characteristics of any one individual crude oil and influence the octane number of the gasoline. 

In the solid state the molecular structures of (PhAs)g and (PhSb)g are similar. Both homocycles adopt the structure of highly puckered six-membered rings analogous to the chair form of cyclohexane in which phenyl groups occupy equatorial positions ... 

Cyclopropane is somewhat less stable than cyclohexane, CgHi, which has a molecular structure with a zigzag ring of six carbon atoms with no bending of bonds and with the stable (staggered) orientation for each of the six carbon-carbon bonds, as you will see when you turn the page. 

We have seen that RDF descriptors are one-dimensional representations of the 3D structure of a molecule. A classification of molecular structures containing characteristic structural features shows how the descriptor preserves effectively the 3D structure information. For this experiment, Cartesian RDF descriptors were calculated for a mixed data set of 100 benzene derivatives and 100 cyclohexane derivatives. Each compound was assigned to one of these classes, and a Kohonen neural network was trained with these data. The task for the Kohonen network was to classify the compounds according to their Cartesian RDF descriptors. 

The EACN was found to depend on the oil molecular structure. Branching was not found to alter it significantly unless it is extensive, but cyclisation tends to cut it down definitely. EACN was found to be 3.5 for cyclohexane and (3.5 + n) for alkyl cyclohexanes with n carbon atoms in their alkyl chain benzene EACN was initially found to be close to 0 alkylbenzenes were found to have an EACN equal to the number of carbon atoms of their alkyl chain [4]. Recent findings with extremely pure surfactants tend to indicate that these results for aromatic oils might be erroneous, or at least misleading, because these solvents... 

Figure 12.8 (a) Synthesis of cyclohexane imine-based carbonic anhydrase mimics with a hydro-phobic binding pocket, (b) X-ray molecular structure of the zinc(II) acetate complex of CM-l,3,5-tris [3-(2-furyl)prop-2-enylideneamino]cyclohexane showing the actate coordination, highly reminiscent of Zn-coordinated hydrogen carbonate in carbonic anhydrase. ... 

The molecular structure of trimeric dimethylaluminum hydride can only be a matter for speculation. If metal-metal bonding is important, the AI3H3 ring must be planar. This is in reement with the infrared absorption spectmm of dimethylaluminum hydride in cyclohexane ° If the Al—Hb and Al-Al bond distances are equal to those in the dimer, tire < Hb—Al-Hb angle must be 137°. 

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