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Stacking (chemistry) - Wikipedia

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In chemistry, pi stacking (also called π–π stacking) refers to the presumptive attractive, noncovalent pi interactions (orbital overlap) between the pi bonds of aromatic rings. However this is a misleading description of the phenomena since direct stacking of aromatic rings (the "sandwich interaction") is electrostatically repulsive. What is more commonly observed (see figure to the right) is either a staggered stacking (parallel displaced) or pi-teeing (perpendicular T-shaped) interaction both of which are electrostatic attractive[1][2] For example, the most commonly observed interactions between aromatic rings of amino acid residues in proteins is a staggered stacked followed by a perpendicular orientation. Sandwiched orientations are relatively rare.[3]

Stacking (chemistry) - Wikipedia Jump to content From Wikipedia, the free encyclopedia Attractive interactions between aromatic rings In chemistry , stacking refers to superposition of molecules or atomic sheets owing to attractive interactions between these molecules or sheets. Metal dichalcogenide compounds [ edit ] MoS 2 , the most common metal dichalcogenide, adopts a layered structure. Metal dichalcogenides have the formula ME 2 , where M = a transition metal and E = S, Se, Te. [ 1 ] In terms of their electronic structures, these compounds are usually viewed as derivatives of M 4+

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