Hexa­aqua­dodeca-μ₂-iodido-octahedro-hexa­tantalum diiodide tetra­hydrate

The crystal structure of the title compound comprises a [Ta₆I₁₂(H₂O)₆]²⁺ unit, two I⁻ counter-anions and four water mol­ecules of crystallization. The charge-assisted crystal packing is consolidated by hydrogen bonds.

(4-Amino­pyridine-κN¹)(2,2′-bi­pyridine-κ²N,N′)(2,2′:6′,2′′-terpyridine-κ³N,N′,N′′)ruthenium(II) bis­(hexa­fluorido­phosphate) unknown solvate

The ruthenium dication and hexa­fluorido­phosphate anions of the title salt are linked by N—H⋯F hydrogen bonds at the amino group of the substituted pyridine ring. The Ru—N bond lengths show the expected range.

(2E)-2-(3,4-Di­meth­oxy­benzyl­idene)-3,4-di­hydro­naphthalen-1(2H)-one

In the title chalcone derivative, the cyclo­hexa­none ring adopts a distorted half-chair conformation and the dihedral angle between the aromatic rings is 52.20 (15)°. In the crystal, weak C—H⋯O hydrogen bonds link the mol­ecules into C(12) [001] chains.

2-(Naphthalen-2-yl­oxy)-N′-[2-(naphthalen-2-yl­oxy)acet­yl]acetohydrazide monohydrate

In the crystal, mol­ecules of the title compound, C₂₄H₂₀N₂O₄·H₂O, form twisted planes parallel to (011). Water mol­ecules donate O—H⋯O and accept N—H⋯O hydrogen bonds, forming helical arrangements.