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In the title compound, [(tBuSiMe2O)2MoO2(2,2'-bipyridine)] or [Mo(C6H15OSi)2O2(C10H8N2)], the MoVI atom has a distorted octahedral environment with the siloxy substituents occupying the trans positions. The complex contains a rare (R3SiO)2MO2 (M = Mo, W) structural motif and was formed in a reaction between sodium molybdate and tert-butyldimethylsilyl chloride in the presence of 2,2-bipyridine. In the crystal, neighbouring molecules are linked by C-H...==Mo hydrogen bonds, forming chains propagating along the a-axis direction. [ABSTRACT FROM AUTHOR]

Facile synthetic routes for three 4-substituted 2,2'-bipyridine derivatives, 4-[2-(4-methylphenyl)ethynyl]-2,2,-bipyridine, C19H14N2, (I), 4-[2-(pyridin-3-yl)ethynyl]-2,2'-bipyridine, C17H11N3, (II), and 4-(indol-4-yl)-2,2'-bipyridine, C18H13N3, (III), via Sonogashira and Suzuki-Miyaura cross-coupling reactions, respectively, are described. As indicated by X-ray analysis, the 2,2'-bipyridine core, the ethylene linkage and the substituents of (I) and (II) are almost planar [dihedral angles between the two ring systems: 8.98 (5) and 9.90 (6)° for the two molecules of (I) in the asymmetric unit and 2.66 (14)° for (II)], allowing π-conjugation. On the contrary, in (III), the indole substituent ring is rotated significantly out of the bipyridine plane [dihedral angle = 55.82 (3)°], due to steric hindrance. The crystal packings of (I) and (II) are dominated by π-π interactions, resulting in layers of molecules parallel to (302) in (I) and columns of molecules along the a axis in (II). The packing of (III) exhibits zigzag chains of molecules along the c axis interacting through N--H...N hydrogen bonds and π-π interactions. The contributions of unknown disordered solvent molecules to the diffraction intensities in (II) were removed with the SQUEEZE [Spek (2015). Acta Cryst. C71, 9-18] algorithm of PLATON. The given chemical formula and other crystal data do not take into account these solvent molecules. [ABSTRACT FROM AUTHOR]

The structure of the title salt, [CrCl(C10H8N2)2(H2O)][ZnCl4], has been determined from synchrotron data. The CrIII ion is coordinated by four N atoms from two 2,2'-bipyridine (bipy) ligands, one O atom from a water molecule and a chloride anion in a cis arrangement, displaying a distorted octahedral geometry. The tetrahedral [ZnCl4]2- anion is slightly distorted owing to its involvement in O-H···Cl hydrogen bonding with the coordinating water molecule. The Cr-N(bipy) bond lengths are in the range 2.0485 (13)-2.0632 (12) Å , while the Cr-Cl and Cr-OH2) bond lengths are 2.2732 (6) and 1.9876 (12) Å, respectively. In the crystal, molecules are stacked along the a axis. [ABSTRACT FROM AUTHOR]

The common feature of the title compounds, [Zn(C5H10NO2S2)2(C10H8N2)]-- 2H2O, (I), and [Zn(C6H12NOS2)2(C10H8N2)], (II), is the location of the Znn atoms on a twofold rotation axis. Further, each ZnII atom is chelated by two symmetry-equivalent and symmetrically coordinating dithiocarbamate ligands and a 2,20-bipyridine ligand. The resulting N2S4 coordination geometry is based on a highly distorted octahedron in each case. In the molecular packing of (I), supramolecular ladders mediated by O--H···O hydrogen bonding are found whereby the uprights are defined by {···HO(water)···HO(hydroxy)···}n chains parallel to the a axis and with the rungs defined by 'Zn[S2CN(CH2CH2)2]2'. The water molecules connect the ladders into a supramolecular layer parallel to the ab plane via water-O--H···S and pyridyl-C--H···O(water) interactions, with the connections between layers being of the type pyridyl-C--H···S. In (II), supramolecular layers parallel to the ab plane are sustained by hydroxy-O -- H···S hydrogen bonds with connections between layers being of the type pyridyl-C--H···S. [ABSTRACT FROM AUTHOR]