ABSTRACT
The structure of the title salt, (C8H10NO)2[CoCl4], is isotypic with the analogous cuprate(II) structure. The asymmetric unit contains one 4-acetyl-anilinium cation and one half of a tetra-chlorido-cobaltate(II) anion for which the Co(II) atom and two Cl(-) ligands lie on a mirror plane. The Co-Cl distances in the distorted tetra-hedral anion range from 2.2519â (6) to 2.2954â (9)â Å and the Cl-Co-Cl angles range from 106.53â (2) to 110.81â (4)°. In the crystal, cations are self-assembled by inter-molecular N-Hâ¯O hydrogen-bonding inter-actions, leading to a C(8) chain motif with the chains running parallel to the b axis. π-π stacking inter-actions between benzene rings, with a centroid-to-centroid distance of 3.709â Å, are also observed along this direction. The CoCl4 (2-) anions are sandwiched between the cationic chains and inter-act with each other through inter-molecular N-Hâ¯Cl hydrogen-bonding inter-actions, forming a three-dimensional network structure.
ABSTRACT
The structure of the title salt, (C8H10NO)2[HgCl4], is isotypic with that of the cuprate(II) and cobaltate(II) analogues. The asymmetric unit contains one 4-acetyl-anilinium cation and one half of a tetra-chlorido-mercurate(II) anion (point group symmetry m). The Hg-Cl distances are in the range 2.4308â (7)-2.5244â (11)â Å and the Cl-Hg-Cl angles in the range of 104.66â (2)-122.94â (4)°, indicating a considerable distortion of the tetra-hedral anion. In the crystal, cations are linked by an inter-molecular N-Hâ¯O hydrogen-bonding inter-action, leading to a C(8) chain motif with the chains extending parallel to the b axis. There is also a π-π stacking inter-action with a centroid-to-centroid distance of 3.735â (2)â Å between neighbouring benzene rings along this direction. The anions lie between the chains and inter-act with the cations through inter-molecular N-Hâ¯Cl hydrogen bonds, leading to the formation of a three-dimensional network structure.
