Synthesis and Crystal Structure of Hexakis(imidazole) nickel (II) O,O′-diphenyldithiophosphate [Ni(Im)6](Ph2O2PS2)2
The crystal and molecular structures of [Ni(Im)6](dtp)2 (Im = imidazole, dtp = O,O′-diphenyldithiophosphate) have been determined by X-ray crystallography. It crystallizes in the triclinic system, space group Pī, with cell parameters a = 9.375 (2), b = 12.324(3), c = 13.285(3) Å, α = 107.86(3), β = 102.28(3), γ = 109.24(3), and Z = 1. The crystal structure of the title compound is built up of discrete monomeric molecules of [Ni(Im)6](dtp)2. The nickel (II) ion is hexacoordinated by six imidazole molecules and the coordination environment of Ni (II) is of octahedral geometry. In the solid state, a network of N-H∙∙∙S intermolecular hydrogen bonds connect the Ni(Im)6 moieties and O,O′-diphenyl- dithiophosphate molecules, forming a three-dimensional structure.
Hydrogen-bonded assembly of [Ni(Im)6]2+ ion and phosphorus anions: Different sandwiched-type/tessellate-type supramolecular architectures and 1D water chains
Four new [Ni(Im)6]2+-phosphorus compounds, namely, [Ni(Im)6](PO4)·ImH·4 H2O (1), [Ni(Im)6][Ni(AEDPH)(Im)3]2 (2) [Ni(Im)6][Ni(AEDP)(Im)3]·Im·3 H2O (3), [Ni(Im)6][Ni(Im)3(APTPH)]·Im·ImH·8 H2O (4), (AEDPH4 = 1-aminoethylidenediphosphonic acid, APTPH6 = 1-aminopropane-1,1,3-triphosphonic acid), are synthesized and characterized. These compounds illustrate various three-dimensional (3D) supramolecular structures. Compounds 1 and 2 both contain a two-dimensional (2D) packing arrangement of [Ni(Im)6]2+ ions however they feature different sandwich-type structures: in 1, PO43− ions and ImH+ ions are self-assembled to form a one-dimensional (1D) zigzag supramolecular chain; while a 2D pillared layer structure is generated by the interconnection of [Ni(AEDPH)(Im)3]− ions in 2. Compounds 3 and 4 both comprise a 1D packing arrangement of [Ni(Im)6]2+ ions however they form dissimilar tessellate-type architectures: in 3, 1D double chain structure is constructed by [Ni(AEDPH)(Im)3]2− ions and Im molecules, whereas in 4, [Ni(Im)3(APTPH)]3− ions, Im molecules and ImH+ ions are integrated to generate a 3D supramolecular network with extended 1D channels. Moreover, compounds 1, 3 and 4 all contain diverse 1D water chain structures: C8 helix water chain in 1, C4 zigzag water chain in 3, and 1(1)8(1)C14 wavelike water chain in 4. The effects of phosphorus counterions on the structural types of the final products, as well as the hydrogen bond motifs, are also discussed in detail.
Frank Must Marry Money: Men, Women, and Property in Trollope's Novels
There is a continuing debate about the extent to which women in the 19th century were involved in economic life. The paper uses a reading of a number of novels by the English author Anthony Trollop...