Hydrolysis of 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine with Pd(II) and Pt(II) Complexes

In this paper, we report the crystal and molecular structure of two compounds obtained from the reactions between the ligand 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (TpymT) with Pd(II) and Pt(II) [M(Cl₂(CH₃CN)₂] complexes. The ligand hydrolyses into the anion N-[(pyrimidine)carbonyl]pyrimidine-2-carboxamidato (bpcam⁻), giving compounds with the formula [Pd(bpcam)Cl]·H₂O, 1, and [Pt(bpcam)Cl]·DMSO, 2. Compounds 1 and 2 crystallize in the monoclinic crystal system with C2/c and P2₁/n space groups. The compounds are square planar, with the bpcam⁻ acting as a tridentate-κ³N anionic ligand and the Cl⁻ anion in the fourth position. In both complexes, the molecules stack in columns presenting interactions between the aromatic rings, reinforced in 2 by Pt···Pt interactions. The complexes interact with the solvent molecules through H-bonds building a 3D structure. We analyzed the systems through geometric parameters and Hirshfeld surface studies. The energy frameworks indicate that the main interactions between molecules in the crystal are dispersion forces.

Graphical Abstract

The paper presents the X-ray structures of [M(bpcam)Cl]·where bdcam- is the anion N-[(pyrimidine)carbonyl]pyrimidine-2-carboxamidato and M = Pd(II) and Pt(II), as well as Hirshfeld Surface and Energy Framework studies.