Stacking (chemistry)

A combination of tetracyanoquinodimethane (TCNQ) and tetrathiafulvalene (TTF) forms a strong charge-transfer complex referred to as TTF-TCNQ.

[9] Linear chain compounds are materials composed of stacked arrays of metal-metal bonded molecules or ions.

What is more commonly observed are either a staggered stacking (parallel displaced) or pi-teeing (perpendicular T-shaped) interaction both of which are electrostatic attractive.

[13] 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.

The π–π interaction between A and B directed the formation of an interlocked template intermediate that was further cyclized by substitution reaction with compound C to generate the [2]catenane product.

MoS 2 , the most common metal dichalcogenide, adopts a layered structure.
Edge-on view of portion of crystal structure of hexamethylene TTF /TCNQ charge transfer salt, highlighting the segregated stacking. [ 2 ]
Side view of ABA layer stacking in graphite
Portion of the lattice of Dicarbonyl(acetylacetonato)rhodium(I) ( Rh(acac)(CO) 2 ) showing the "stacking" of the individual planar units through Rh···Rh interactions.
The synthesis of catenane exploiting attractive pi-stacking interactions between electron-rich and electron-poor arenes.