Crystal structure and Hirshfeld surface analysis of dibromidobis({( <i>S</i> )-2-[1-(dimethylamino)ethyl]phenyl}diphenylsilanol-κ <i>O</i> )zinc(II)

Mol-ecules of the title compound, [ZnBr₂(C₂₂H₂₅NOSi)₂], are situated across a twofold axis passing through the central Zn atom in the uncommon space group C222₁. The organic ligands feature migration of Si-OH protons to the amine substituents, while the resulting zwitterions adopt strong charge-assisted intra-molecular N-H⋯O hydrogen bonds [N⋯O = 2.5895 (13) Å]. They act as monodentate ligands through highly nucleophilic silanolate O atoms, completing a distorted ZnBr₂O₂ tetra-hedral environment of the metal ions [Zn-O = 1.9509 (9) Å]. In the crystal, weak C-H⋯Br hydrogen bonds govern the assembly of a two-dimensional pattern parallel to the (110) plane, further consolidated by C-H⋯π bonding. These findings are in line with the results of Hirshfeld surface analysis. The latter reveals the prevalence of H⋯H inter-actions (67.9%), which are followed by H⋯C/C⋯H (21.5%) and Br⋯H/H⋯Br (10.5%) contacts. The fingerprint plots also indicate the presence of crystal voids that are consistent with a relatively loose packing.