All-Gauche Alkane: Is It Possible? I've learned about anti and gauche conformations throughout my scholastic journey, and I have heard often that straight-chain alkanes always adopt an all-anti conformation in their lowest energy state. I also know that, in a pure sample of any given straight-chain alkane, (eg. hexane) the anti and gauche conformations are in a certain equilibrium with each other, And that this ratio of gauche to anti shifts towards gauche as the available energy of the sample (i.e. temperature/heat/ pressure) approaches infinity.  My question is as follows: Has anyone in the scientific community to date successfully forced an entire sample of straight-chain alkanes into the all-gauche conformation without significantly raising the conditions above STP? I have scoured the internet but have not surfaced with a definitive answer, so I now turn to the scientific community.

All contributions are greatly appreciated.
At Last! Success!
I found this research paper, which describes a &quot;Self-assembling nanocapsule&quot;, which is held together by plenty of hydrogen bonding, and can assemble around a linear molecule of all-anti tetradecane, $\ce{(C14H20)}$ using the energy afforded by the hydrogen bonding to squeeze/twist the alkane into a helical all-gauche conformation. Have a look:

Cool, right?
Sources:
Scarso A, Trembleau L, Rebek J Jr. Helical folding of alkanes in a
self-assembled, cylindrical capsule. J Am Chem Soc. 2004 Oct 20;126(41):13512-8.
PubMed PMID: 15479107.
Note:
Other answers are still greatly appreciated!