Mizushima, Sanichiro published the artcileNature of the potential hindering internal rotation, Name: 2,3-Dibromo-2,3-dimethylbutane, the publication is Nippon Kagaku Kaishi (1921-47) (1952), 621-3, database is CAplus.
The exptl. results on the infrared absorption, Raman effect, dipole moment, electron diffraction, etc., of ethylene chloride and related compounds are reviewed and the nature of the hindering potential is discussed. The mol. configuration of rotational isomers of XH2CCH2Y-type mols. is independent of the elec. properties of X and Y. Hence the most important factor affecting the hindering potential is something other than electrostatic force. Steric repulsion due to exchange integral between atoms not directly bound together is supposed to be the most important. The internal rotation in Cl3SiSiCl3 is almost free, whereas the hindering barrier in Cl3CCCl3 amounts to 10-15 kcal./mole. This fact suggests that the force hindering internal rotation is very sensitive to at. distance. This also favors the view that steric repulsion rather than electrostatic force plays the major role. Since Br and CH3 have nearly the same van der Waals radii, the energy difference between trans and gauche forms of Br(CH3)2CC(CH3)2Br indicate that electrostatic contribution must not be neglected. Hydrogen-bond formation is important in ClH2CCH2OH, since in this mol. the trans form is less stable than the gauche form. The case of ClOCCOCl with trans configuration as the most stable position reveals importance of resonance giving to the CC bond some double-bond character. Intermol. forces in liquid and solid can affect the equilibrium of rotational isomers but not the mol. configurations determined mainly by steric effect.
Nippon Kagaku Kaishi (1921-47) published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Name: 2,3-Dibromo-2,3-dimethylbutane.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary