The properties of some types noncovalent interactions formed by triplet diphenylcarbene (DPC3) have been investigated means density functional theory (DFT) calculations and quantum atoms in molecule (QTAIM) studies. DPC3···LA (LA = AlF3, SiF4, PF5, SF2, ClF) complexes analyzed from their equilibrium geometries, binding energies, electron density. triel bond the DPC3···AlF3 complex exhibits a pa...

Abstract It is well known that, under certain conditions, C( sp 3 ) atoms behave, via their ?-hole, as Lewis acids in tetrel bonding. Here, we show that methyl groups, when bound to less electronegative than carbon, can counterintuitively participate noncovalent interactions electron density donors. Thousands of experimental structures are found which groups behave bases establish alkaline, alk...

The history of noncovalent interactions is outlined, starting with early interpretations the symmetry crystals, then fast development coordination chemistry, and fundamental analyses in last century. An attempt made to provide for practicing scientists who use a historical background field, paying credit often forgotten predecessors. A separate section shows that only 20th century instrumentati...