Relative Strengths of a Pnicogen and a Tetrel Bond and Their Mutual Effects upon One Another
Steve Scheiner
Abstract
is assessed by DFT calculations, where the T atom refers to C, Si, and Ge; Z = As, Sb, and P; and substituents R = H and F. In most instances, the tetrel bond (TB) is both stronger and shorter than the pnicogen bond (ZB). These two bond strengths can be equalized, or preference shifted to the ZB, if F substituents are placed on the Z and H on the T atoms. Employing C as the T atom results in a very weak TB, with the ZB clearly favored energetically. The simultaneous formation of both TB and ZB weakens both, particularly the latter, but both bonds survive intact. Geometric and spectroscopic perturbations of the subunits reflect the two types of noncovalent bonds.
Topics & Concepts
ChemistryAtom (system on chip)Non-covalent interactionsCrystallographyBondComputational chemistryHydrogen bondMoleculeOrganic chemistryComputer scienceEmbedded systemEconomicsFinanceCrystallography and molecular interactionsMetal-Organic Frameworks: Synthesis and ApplicationsSolid-state spectroscopy and crystallography