Bis(4,4′-bipyridinium) hexacyanoplatinate(IV) bis(4,4′-bipyridine)

Abstract

In the title compound, (C10H9N2)2[Pt(CN)6].2C10H8N2 or [(Hbpy)+]2[Pt(CN)6](2-).2bpy, where bpy is 4,4'-bipyridine, the Hbpy+ cations and bpy molecules form a hydrogen-bonded two-dimensional cationic approximately square grid parallel to the (110) plane. The [Pt(CN)6]2- dianions reside in the cavities within this grid, with the nitrile N atoms forming weak hydrogen bonds with the CH groups in the cationic lattice.

Density Functional Theory Study on the 193Ir Mössbauer Spectroscopic Parameters of Vaska’s Complexes and Their Oxidative Adducts

“…Table shows the reference data of the 193 Ir (73 keV) Mössbauer isomer shifts , for the Ir benchmark complexes to obtain the fitting parameters, α, b , and c , in eq as well as the referenced crystal structure data for the molecular modeling. − The Ir benchmark complexes exhibit octahedral geometries, including tri-, tetra-, and hexavalent Ir ions, whose δ values relative to Ir metal change from −2.26 to +1.45 mm s –1 . The δ values of [Ir III L 6 ] 3+/3– increase in the order of L = Br – < Cl – < SCN – < NH 3 < CN – , reflecting the tendency in the strength of the coordination bonds known as the spectrochemical series. − Table also shows the reference data of the 193 Ir (73 keV) Mössbauer spectroscopic parameters , and the crystal structure data − of Vaska’s complexes trans -[Ir I X­(CO)­(PPh 3 ) 2 ] (X = I – ( 1 ), Br – ( 2 ), Cl – ( 3 ), and F – ( 4 )), which have pseudo-square-planar geometries with a 16 valence electron system consisting of the Ir­(I) contributing 8 valence electrons, Cl – contributing 2 valence electrons, CO contributing 2 valence electrons, and the two PPh 3 ligands contributing 4 valence electrons for the 16 total, and those of the oxidative adducts trans -[Ir III ClYZ­(CO)­(PPh 3 ) 2 ] (YZ = Cl 2 ( 5 ), I 2 ( 6 ), O 2 ( 7 ), CH 3 I ( 8 ), HCl ( 9 ), and H 2 ( 10 )), which exhibit pseudo-octahedral geometries with an 18 valence electron system with the Ir­(III) contributing 6 valence electrons, Cl – contributing 2 valence electrons, CO contributing 2 valence electrons, the two PPh 3 ligands contributing 4 valence electrons, and the two O 2 2– peroxide ligands contributing 4 valence electrons for the 18 total, as shown in Figure .…”

Rotational disorder in 2‐piperidyl‐5‐nitro‐6 ‐methylpyridine: structural phase transition and its vibrational characteristics

“…Hydrogen-bond geometry in the low temperature-phase (Supporting Information)) agree with expected values and match with those found for similar ligands. [30,31] The asymmetric unit consists of two formula units slightly differing in conformation and linked through the C-H· · ·O bond. Thus, the interaction between the C(3)-H(3) group of pyridine of the molecule A and one of the oxygens of the molecule B leads to the bi-molecular unit (Fig.…”

Synthesis and crystal structure of polymeric 4,4′-bipyridine cadmium(II) sulfate trihydrate

“…The design of supramolecular architectures by a combination of coordination and weak intermolecular interactions, such as hydrogen bonding, -stacking and electrostatic interactions is of considerable current interest [1][2][3]. A number of one-, two-and three-dimensional infinite frameworks with diamondoid [4], helix [5], brick wall [6] and ladder motifs [7,8] have been generated with linear and non-linear organic spacers [9,10].…”