Pd and Pt metal atoms as electron donors in σ-hole bonded complexes

Abstract

In the investigated complexes, the metal atom acts as a Lewis base, with the occupied dz2 orbital serving as the source of charge transferred to the Lewis acid.

Triel Bonds between BH3/C5H4BX and M(MDA)2 (X = H, CN, F, CH3, NH2; M = Ni, Pd, Pt, MDA = Enolated Malondialdehyde) and Group 10 Transition Metal Electron Donors

“…The σ-hole bond is quite strong and varies in the range 6 to 20 kcal/mol. The σ-hole bond involving Pt is stronger than the corresponding bond for Pd, and this difference increases as the size of the Lewis acid atom increases [45]. The π-hole interaction between C 6 F 6 and the squareplanar [M(II)] (M = Pd, Pt) coordination complex has also been studied.…”

Intermolecular Metal-Involving Pnictogen Bonding: The Case of σ-(SbIII)-Hole···dz2[PtII] Interaction

“…Wright 45 bonding was postulated as an intermediate between ionic and dispersive, but a theoretical analysis was beyond the scope of that work. In the context of intermolecular PnB, one should also quote a purely theoretical study, 22 which established the abilities of Pt II and Pd II to serve as d z 2 -orbital donating components of PnB including the antimony(III) site of SbF 3 . However, this intermolecular bonding with these metal(II) sites has never been observed experimentally.…”

“…In the overwhelming majority of instances, studies of the “named” noncovalent interactions (i.e., named for an element or a group of elements − ) explore nonmetal atoms as coformers exhibiting Lewis basicity. However, it is also established that some positively charged metal ions can function (via their filled d-orbitals) as partners, featuring a negative potential in hydrogen, halogen, − chalcogen, , or metallophilic bonding. In contrast to the progress in understanding and the use of these noncovalent forces for supramolecular chemistry, metal-involving PnB has received very little attention.…”