title: Hierarchical helix of helix in the crystal: formation of variable-pitch helical π-stacked array of single-helical dinuclear metal complexes.
abstract: Unique helix of helix structures were formed via intermolecular π-stacking and metal-metal interactions in the crystal of single-helical dinuclear complexes [L(2)M(2)] (M = Pd, Ni) having an acyclic bis(N(2)O(2))-type ligand. The difference in the helical winding angle of the constituents (401.7° for [L(2)Pd(2)]; 421.3° for [L(2)Ni(2)]) led to variation of the helical pitches of the helical array (7(2) helix for [L(2)Pd(2)]; 6(2) helix for [L(2)Ni(2)]).
authors.affiliation: Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan. akine@chem.tsukuba.ac.jp
authors.forename: Shigehisa
authors.initials: S
authors.lastname: Akine
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nagumo
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nabeshima
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D010636:Phenols; D011725:Pyridines; D010165:Palladium; D009532:Nickel; C023666:pyridine