40 research outputs found
Bis(μ-phenyltellurido-κ2 Te:Te)bis[tetracarbonylrhenium(I)]
The title compound, [Re2(C6H5Te)2(CO)8], crystallizes with two molecules in the asymmetric unit, in which two Re atoms are coordinated in a slightly distorted octahedral environment and are bridged by two Te atoms, which show a distorted trigonal-pyramidal geometry. The torsion angles for the Te—Re—Te—Re sequence of atoms are 19.29 (18) and 16.54 (16)° in the two molecules. Thus, the Re—Te four-membered rings in the two molecules deviate significantly from planarity. Two intramolecular C—H⋯O interactions occur in one of the molecules. Te—Te [4.0551 (10) Å] interactions between the two molecules and weak intermolecular C—H⋯O interactions stabilize the crystal packing
Diaquadichloridobis(pyridine-κN)manganese(II)
The molecular title compound, [MnCl2(C5H5N)2(H2O)2], lies about an inversion centre. The MnII atom is in an all-trans octahedral environment defined by two water molecules, two chloride anions and two pyridine ligands. An intermolecular hydrogen-bonding interaction between a water molecule and a chloride anion bonded to an adjacent MnII atom generates an eight-membered ring. The crystal packing exhibits two intermolecular π–π stacking interactions between the aromatic rings, with centroid–centroid distances of 3.485 (12) and 3.532 (12) Å
Butane-1,4-diyl bis(pyridine-4-carboxylate)
The molecule of the title compound, C16H16N2O4, lies about an inversion centre; the butane chain adopts an extended zigzag conformation. The dihedral angle between the pyridine ring and the adjacent COO group is 3.52 (s14)°
2,2′-[Naphthalene-1,5-diylbis(nitrilomethanylylidene)]diphenol
The title compound, C24H18N2O2, lies about an inversion centre and the asymmetric unit contains one half-molecule. An intramolecular O—H⋯N hydrogen bond generates a six-membered ring, producing an S(6) ring motif. The crystal packing exhibits intermolecular π–π stacking interactions between the aromatic rings with a centroid–centroid distance of 3.851 (2) Å
Heptacarbonyl-1κ3 C,2κ4 C-(4-phenylpyridine-1κN)di-μ-phenyltellurido-1:2κ4 Te:Te-dirhenium(I)
In the title complex, [Re2(C6H5Te)2(C11H9N)(CO)7], two Re atoms are coordinated in slightly distorted octahedral coordination environments and are bridged by two Te atoms, which are coordinated in trigonal-pyramidal environments. The torsion angle for the Te—Re—Te—Re sequence of atoms is 17.06 (3)°. The crystal structure is stabilized by weak C—H⋯O and C—H⋯π interactions. In addition, there are Te⋯Te distances [4.0392 (12) Å] and O⋯O distances [2.902 (19) Å] which are shorter than the sum of the van der Waals radii for these atoms. A short intermolecular lone pair⋯π distance [C O⋯Cg = 3.31 (2) Å] is also observed