ABSTRACT: In the title compound, [Hg(NCS)(2)(C(11)H(6)N(2)O)], the Hg(II) atom, lying on a twofold rotation axis, is four-coordinated in a distorted tetra-hedral geometry by an N,N'-bidentate diaza-fluoren-9-one ligand and two thio-cyanate anions. In the crystal, inter-molecular C-H?N and C-H?O hydrogen bonds are effective in the stabilization of the structure.
Project description:In the title complex, [Co(NCS)(2)(C(3)H(4)N(2))(2)(C(11)H(6)N(2)O)], the Co(II) atom has a distorted octa-hedral coordination with the N atoms of the 4,5-diaza-fluoren-9-one ligand and two N atoms from imidazole ligands in the equatorial positions and the axial sites occupied by two N atoms of the thio-cyanate ligand. Inter-molecular N-H?O hydrogen bonding forms a one-dimensional motif parallel to the cell ab diagonal.
Project description:The Au(III) atom in the title compound, (C(11)H(7)N(2)O)[AuCl(4)]·C(11)H(6)N(2)O, is in a nearly square-planar environment defined by four Cl atoms. The protonated 9-oxo-4,5-diaza-fluoren-4-ium cation forms an N-H?N hydrogen bond with the neutral 4,5-diaza-fluoren-9-one mol-ecule.
Project description:The title compound, C(17)H(12)N(2)O·H(2)O, was synthesized by the reaction of 4,5-diaza-fluoren-9-one with a Grignard reagent in ether (the reaction mixture being hydrolysed with saturated NH(4)Cl solution), and crystallizes with two organic mol-ecules and two water mol-ecules in the asymmetric unit. The 4,5-diaza-fluorene fragment is approximately planar, with r.m.s. deviations of 0.0448 and 0.0198?Å in the two mol-ecules. The dihedral angles between the 4,5-diaza-fluorene planes and the phenyl ring are 80.49?(6) and 76.57?(7)°. The crystal packing features O-H?N and O-H?O hydrogen bonds involving the bridging solvent water mol-ecules, which link the mol-ecules into a three-dimensional network.
Project description:The title compound, [Ni(C(11)H(6)N(2)O)(H(2)O)(4)](NO(3))(2), was prepared by the reaction of Ni(NO(3))(2) and 4,5-diaza-fluoren-9-one (dafo). The crystal packing consists of a three-dimensional network via O-H?O hydrogen bonds between the coordin-ated water mol-ecules and the nitrate anions. The Ni atom lies on a special position (Wyckoff position 4e, site symmetry 2), as does the carbonyl O atom.
Project description:The asymmetric unit of the title complex, [Zn(H(2)O)(6)](C(10)H(5)O(8))(2)·2C(11)H(6)N(2)O·2H(2)O, contains one half of the complex cation with the Zn(II) ion located on an inversion center, a monovalent 2,4,5-tricarboxybenzoate (1,2,4,5-BTC) counter-anion, a 4,5-diaza-fluoren-9-one (DAFO) mol-ecule and an uncoordinated water mol-ecule. In the crystal structure, O-H?O and O-H?N hydrogen bonds link the cations, anions and water mol-ecules into a three-dimensional network.
Project description:The title compound, [Cd(C(11)H(5)N(2)O(2))(2)(H(2)O)(2)], is a mononuclear complex consisting of a Cd(II) atom, two 3-hydr-oxy-4,5-diaza-fluoren-9-one ligands and two coordinated water mol-ecules. The Cd(II) atom, lying on a twofold axis, displays a distorted octa-hedral coordintion. Adjacent mol-ecules are linked by O-H?O hydrogen bonds and ?-? inter-actions [centroid-centroid distance = 3.84?(1)?Å], leading to a one-dimensional chain. Weak C-H?O hydrogen bonds connect the chains into a two-dimensional supra-molecular structure.
Project description:In the title coordination polymer, [Hg(NCS)(2)(C(4)H(5)N(3))], the Hg(II) atom is four-coordinated by one aromatic N atom from a 2-amino-pyrimidine ligand, one S atom from a terminal thio-cyanate ligand, and one S atom and one N atom from a bridging thio-cyanate ligand. The crystal structure features polymeric chains running along the b axis which are stabilized by N-H?N hydrogen bonds.
Project description:In the title salt, [Hg(NCS)(CH4N2S)3]Cl, the Hg(2+) ion is coordinated in a severely distorted tetra-hedral manner by three thio-urea groups and one thio-cyanate anion through their S atoms. The S-Hg-S angles vary widely from 87.39?(5) to 128.02?(4)°. Weak intra-molecular N-H?S hydrogen bonds are observed, which form S(6) ring motifs. In the crystal, the ions are linked by N-H?N and weak N-H?Cl inter-actions, generating a three-dimensional network.
Project description:In the mol-ecule of the title compound, C(17)H(11)N(3), the 4,5-diaza-fluorenyl-idene unit is nearly planar and is oriented with respect to the phenyl ring at a dihedral angle of 75.75?(3)°. In the crystal structure, the mol-ecules are aligned in the  direction in such a way that neighbouring 4,5-diaza-fluorenyl-idene planes face each other in an anti-parallel fashion.
Project description:In the title compound, C(11)H(7)N(3), the diaza-fluorene rings are almost coplanar with an r.m.s. deviation of 0.0160?Å. In the crystal structure, C-H?N hydrogen bonds link mol-ecules into sheets parallel to the ab plane. Mol-ecules are also stacked regularly along the c axis by a variety of ?-? inter-actions with centroid-centroid distances in the range 3.527?(2)-3.908?(2)?Å.