Inducing Helical Chirality by Deforming Hexanuclear Metalloprismatic Structures

A comparative structural study of eleven empty and eight filled hexanuclear metalloprismatic cages reveals helical chirality depending on the twist angle between the upper and lower triangles defined by three metal centres

Dichlorido[1-(2-chloro­eth­yl)-3-(pyridin-4-ylmethyl-κN)urea](η6-hexa­methyl­benzene)­ruthenium(II) chloro­form monosolvate

The RuII atom in the title compound, [RuCl2(C12H18)(C9H12ClN3O)]·CHCl3, exhibits a typical piano-stool coordination, defined by a hexa­methyl­benzene ligand, two chloride ligands and a pyridyl­urea ligand coordinated through the pyridine N atom. In the crystal, a dimeric structure is observed due to two strong N—H⋯Cl inter­actions between the NH groups of urea and the two chloride ligands of neighbouring mol­ecules. In addition, the C=O group of the urea moiety inter­acts with the solvent mol­ecule through weak C—H⋯O interactions