Structure of ethane

Figure 1.18 (a) In this structure of ethane, based on quantum mechanical... 

Pophristic, V. Goodman, L. Hyperconjugation Not Steric Repulsion Leads to the Staggered Structure of Ethane. Nature 2001, 411, 565-568. 

Full 360° rotation leads to three identical staggered structures which are energy minima, and three identical eclipsed structures which are energy maxima. The difference in energy between eclipsed and staggered structures of ethane, termed the barrier to rotation, is known experimentally to be 2.9 kcal/mol (12 kJ/mol). Note, that any physical measurements on ethane pertain only to its staggered structure, or... 

Figure 11.3. The hep structure of ethane, (a) A projection on the base for four unit cells with heights along c0 are shown. (b) A packing drawing of four C2H6 molecules as projected on a vertical plane indicated by a dot-and-dash line in (a). Letters identify corresponding molecules in (a) and (b).

V. Pophristic, L. Goodman, Hyperconjugation not steric repulsion leads to the staggered structure of ethane. Nature 411, 565-568 (2001)... 

LEWIS STRUCTURE OF ETHANE DOTS REPRESENT ELECTRONS AND UNES REPRESENT COVALENT BONDS. 

The three-dimensional structure of ethane, C2H6, has the shape of two tetrahedra joined together. Each carbon atom is sp3 hybridized, with four sigma bonds formed by the four sp3 hybrid orbitals. Dashed lines represent bonds that go away from the viewer, wedges represent bonds that come out toward the viewer, and other bond lines are in the plane of the page. All the bond angles are close to 109.5°. 

Figure 1.12 The structure of ethane. The carbon-carbon bond is formed by a overlap of two carbon sp hybrid orbitals. For clarity, the smaller lobes of the sp hybrid orbitals are not shown.

One more reaction of the ethylene halides must be mentioned, as, in it, we have a direct proof that the structure of ethane is as represented, viz., the symmetrical structure. Our evidence of this structure, thus far is simply indirect, i.e., from the proof that the other isomeric di-halogen ethane has the unsymmetrical structure. 

The third member of the alkane series, propane, has three carbon atoms and eight hydrogen atoms, giving it the molecular formula C3Hg. The next member, butane, has four carbon atoms in a continuous chain and the formula C4H10. Compare the structures of ethane, propane, and butane in Figure 22-3. 

What kind of compound is ethane Describe the formation of ethane from carbon and hydrogen atoms, and draw the electron dot structure of ethane. 

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