Acta Crystallographica Section E Crystallographic Communications最新文献

The structure of the title compound, C₂₃H₂₆O₅ or CH₂=C(CH₃)-C(O)O-C₆H₄-O(O)C-C₆H₄-OC₆H₁₃, has been determined. The mol-ecule is non-planar and the dihedral angle between the phenyl rings is 50.72 (4)°. The crystal packing differs from those typical for mesogenic compounds. Only a weak directional inter-action of the C-H⋯O type combines mol-ecules in endless chains running along the a axis.

In the title compound, C₁₆H₁₅N₃O₃S₂, the hydrazide N atom bonded to the C=O group is planar, whereas that bonded to the SO₂ group is pyramidally coordinated. The inter-planar angle between the ring systems is 40.71 (3)°. Mol-ecules are connected into ribbons parallel to the b axis by two classical hydrogen bonds N-H⋯O=C and N-H⋯N_thia-zole.

The Pt^II atom in the title compound, [PtCl₂{(C₆H₄)(NH₂)₂}], lies on a twofold rotation axis and has a slightly distorted square-planar coordination environment defined by two N atoms of an 1,2-phenyl-enedi-amine ligand and two Cl^- ions. In the crystal, the planar complex mol-ecules are stacked parallel to the c axis, resulting in a columnar structure. In a column, an infinite almost straight Pt⋯Pt chain is formed, suggesting weak metal-metal inter-actions [Pt⋯Pt = 3.3475 (8) Å]. The crystal packing is stabilized by a three-dimensional N-H⋯Cl hydrogen-bonding network between the amino groups and the Cl ligands of adjacent mol-ecules.

The structure of the title Schiff base, C₁₆H₁₇N₃O, displays a trans configuration with respect to the C=N double bond, with a dihedral angle of 14.98 (9)° between the benzene rings. In the crystal, mol-ecules are linked by N-H⋯O and C-H⋯O hydrogen-bonding inter-actions, giving sheets extending across the (001) plane. Hirshfeld surface analysis gave fingerprint plots showing enrichment ratios for H⋯H, O⋯H, N⋯H and C⋯H contacts compared to C⋯C, N⋯N and C⋯N contacts, indicating a high propensity for H⋯H interactions to form in the crystal.

The title ion-association metal complex, [Li(C₄H₈O)₄]₂[Mg₂(C₄₃H₆₁O₃)₂], has been synthesized from the tridentate phenolic ligand tris-(3,5-di-tert-butyl-2-hy-droxy-phen-yl)methane in tetra-hydro-furan (THF). The aryl-oxo magnesiate complex anion is binuclear with each Mg₂O₄ complex unit inversion-related and bridged through the two tridentate chelating phenolate O-donors of the ligand. The complex centres have a distorted tetra-hedral stereochemistry [Mg-O range 1.8796 (17)-2.0005 (16) Å] and an Mg⋯Mg separation of 2.9430 (14) Å]. The LiO₄ coodination sphere of the cation comprises four THF O-donor atoms and has a slightly distorted tetra-hedral conformation [Li-O range 1.899 (5)- 1.953 (5) Å]. In the crystal, a number of stabilizing intra-anion C-H⋯O hydrogen-bonding inter-actions are present but no inter-species associations are found.

In the structure of the title compound [systematic name: tetra-aqua-bis-(thio-cyanato-κN)cobalt(II)-1,3,7-trimethyl-1,2,3,6-tetra-hydro-7H-purine-2,6-dione-water (1/2/4)], [Co(NCS)₂(H₂O)₄]·2C₈H₁₀N₄O₂·4H₂O, the cobalt(II) cation lies on an inversion centre and is coordinated in a slightly distorted octa-hedral geometry by the oxygen atoms of four water mol-ecules and two N atoms of two trans-arranged thio-cyanate anions. In the crystal, the complex mol-ecules inter-act with the caffeine mol-ecules through O-H⋯N, O-H⋯O and C-H⋯S hydrogen bonds and π-π inter-actions [centroid-to-centroid distance = 3.4715 (5) Å], forming layers parallel to the ab plane, which are further connected into a three-dimensional network by O-H⋯O and O-H⋯S hydrogen bonds involving the non-coordinating water mol-ecules.

The title trinuclear ruthenium cluster, [Ru₃(C₃₀H₂₄P₂)(C₉H₁₁P)(CO)₇(μ-H)₂], has a triangular Ru₃ core that is capped with a mesitylphosphin-idene ligand, μ₃-PMes (Mes = mesityl = 2,4,6-tri-methyl-phen-yl). The 1,2-bis-(di-phenyl-phosphan-yl)benzene mol-ecule acts as a bidentate phosphine ligand via two P atoms connecting to a single Ru atom. The title compound crystallizes with two independent mol-ecules in the asymmetric unit.