GRAPHICAL ABSTRACT
AUTHORS: Luís H. Simões and Rodrigo A. Cormanich*
TITLE: Challenges in Studying Steric Interactions in Highly Strained Perhalogenated Alkanes and Silanes
TEXT: Natural Bond Orbitals analysis and the Quantum theory of Atoms in Molecules were used to disclose the contribution of hyperconjugative, steric and electrostatic effects for the preferred helical geometry of perfluoro and perchloroalkanes and silanes.