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ISSN: 2414-3146

March 2021 issue

Highlighted illustration

Cover illustration: (4-Amino­pyridine-[kappa]N1)(2,2'-bi­pyridine-[kappa]2N,N')(2,2':6',2''-terpyridine-[kappa]3N,N',N'')ruthenium(II) bis­(hexa­fluorido­phosphate) crystallizes with one dicationic Ru complex, two PF6- anions, and undefined solvent in the asymmetric unit. The cation and anions are linked via N-H...F hydrogen bonding. The complex was explored previously to determine the impact of pyridine substitution on mol­ecular excited states. See: Reed, Garner & Brennessel [IUCrData (2021). 6, x210287].

inorganic compounds

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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.

metal-organic compounds

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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.

organic compounds

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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.

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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.
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