Intermolecular interactions stacking

Reaction of [Rh(/z-Cl)(CO)2]2 with sodium pyrazolate leads to 206 (85CJC699). The Rh2N2Cl ring has the envelope conformation. The rhodium atom has distorted square-planar coordination. The molecules in the crystalline lattice form onedimensional stacking units with alternating rhodium atoms in the binuclear units, intermolecularly interacting in a zigzag chain. 

The next update of the null hypothesis would incorporate a zero-order description of bonding, in terms of a prior prejudice of standard chemical groups. The MaxEnt map then will tell us about the subtle differences induced in formally equivalent chemical bonds by conjugation, stacking, and other intra- and intermolecular interactions. To achieve this degree of accuracy, the refinement of structural parameters... 

Dithiolene complexes with the maleonitriledithiolate (mnt) ligand form highly delocalized systems and are widespread in studies of conducting and magnetic materials. The electronic properties have been extensively studied with various computational methods including Hiickel and extended Hiickel approaches to identify the nature of the orbitals involved in intramolecular and intermolecular interactions. These structural properties allow the complexes to interact in the solid state via short stacking S, S and short interstack S---S contacts.10 4-1048... 

Strong intermolecular interactions between active SCO mononuclear building blocks stem from the presence of efficient hydrogen-bonding networks or 7i-7i stacking interactions and have led to abrupt spin transitions [1], sometimes with associated hysteresis [2-4]. Despite the important efforts made by crystal engineers in establishing reliable connections between molecular and supramolecular structures on the basis of intermolecular interactions, the control of such forces is, however, difficult and becomes even more complicated when uncoordinated counter-ions and/or solvent molecules are present in the crystal lattice. 

As stated in Section 27.3.2, dispersion interactions are fundamental building blocks in intermolecular interactions. Their accurate calculation in the case of larger systems (say tt stacking of aromatic rings) remains, however even today, despite the... 

Fig. 10 Translational molecular stacking of 4-substituted benzyl (Z -muconates in the crystals. R is the ester alkyl group. Dotted lines indicate intermolecular interactions in a column to translationally arrange monomer molecules at a stacking distance of 5 A...

Thus, it has been demonstrated that the combination of weak interactions is useful for the design of topochemical polymerization to yield a new type of stereoregular polymer. The weak intermolecular interactions are tolerant of a variety of crystal structure formations and induce a different molecular stack-... 

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