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Eclipsed

Eclipsed

Eclipsed "Identify yourselves or we will open fire." For the first time in seven years, the universal translator didn't need to do its job. The hail was in Federation Standard.

Conformations of Organic Molecules

In the figure above, the H-C-C-H torsion angles (or dihedral angles) at 180 and 60 are minima and are designated as staggered conformations. Those at 120 and 0 are maxima and are eclipsed conformations. 1

How does C accomplish this ? The first thing we can do is

The first and third conformers that I drew are called the staggered and eclipsed conformations of ethane. The terms refer to the mutual arrangements of the C-H bonds.

Part A. The Conformations of Acyclic Molecules.

a) yes b) no If your answer is yes, where is it? _____ Rotate one carbon atom with respect to the other to make the eclipsed conformation.

MULTIPLE CHOICE. Choose the one alternative that best ...

11) 12) Use a sawhorse structure to depict the eclipsed conformer of ethane. 12) 13) View a butane molecule along the C 2-C 3 bond and provide a Newman projection of the lowest energy conformer.

Visualizing Molecules

In the first case the hydrogen atoms on the different carbons align with one another; we say they are eclipsed. In the second structure the hydrogen atoms staggered in an equal manner.

Staggered ethane changes to eclipsed conformation upon adsorption

JOURNAL OF RAMAN SPECTROSCOPY J. Raman Spectrosc. 2006; 37 : 1398-1402 Publishedonline 9 June 2006 in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/jrs.1556 Staggered ethane changes to eclipsed conformation upon adsorption A. Priebe, 1 A. Pucci, 1 W. Akemann, 2 H. Grabhorn 2 and A ...

IABInternet Advertising Revenue Report

3 PwC Background About the IABInternet Advertising Revenue Report Conducted by PricewaterhouseCoopers LLP ("PwC") on an ongoing basis, with results released quarterly, the "IABInternet Advertising Revenue Report"was initiated by the Interactive Advertising Bureau (IAB) in 1996.

Newman Projections

The other projection that is of primary concern is the "eclipsed" structure. STAGGERED ECLIPSED

2 Ethane

S2.2 Eclipsed and staggered forms. eclipsed form 3 : conformation of ethane and analogs with φ = 0 o, 120 o and 240 o staggered form 4 : conformation of ethane and analogs with φ = 60 o, 180 o and 300 o