Project description:In the title compound, [Ru(C10H10N6)(C7H10N2)3](PF6)2·C4H10O, the Ru(II) cation is coordinated by one tris-(1-pyrazol-yl)methane (Tpm) and three dimethylaminopyridine (dmap) ligands in a slightly distorted octa-hedral geometry. The asymmetric unit consists of one complex cation, two hexa-fluorido-phosphate anions and one diethyl ether solvent mol-ecule in general positions. Although quite a large number of ruthenium complexes of the facially coordinating tridentate Tpm ligand have been structurally characterized, this is only the second one containing three pyridyl co-ligands. The average Ru-N(Tpm) distance is 2.059 (12) Å, while the average Ru-N(dmap) [dmap = 4-(di-methyl-amino)-pyridine] distance is somewhat longer at 2.108 (13) Å. The orientation of the dmap ligands varies greatly, with dihedral angles between the pyridyl and opposite pyrazolyl rings of 14.3 (2), 23.2 (2) and 61.2 (2)°.
Project description:In the title compound, rac-[Ru(C14H16N2)2(C16H8N4)](PF6)2·3C2H3N, discrete dimers of complex cations, [Ru(tmbpy)2-tape](2+), of opposite chirality are formed (tmbpy = tetra-methyl-bipyridine; tape = tetraazaperylene), held together by π-π stacking inter-actions between the tetra-aza-perylene moieties with centroid-centroid distances in the range 3.563 (3)-3.837 (3) Å. These inter-actions exhibit a parallel displaced π-π stacking mode. Additional weak C-H⋯π-ring and C-H⋯N and C-H⋯F inter-actions are found, leading to a three-dimensional architecture. The Ru(II) atom is coordinated in a distorted octa-hedral geometry. The counter-charge is provided by two hexa-fluorido-phosphate anions and the asymmetric unit is completed by three aceto-nitrile solvent mol-ecules of crystallization. Four F atoms of one PF6 (-) anion are disordered over three sets of sites with occupancies of 0.517 (3):0.244 (3):0.239 (3). Two aceto-nitrile solvent mol-ecules are highly disordered and their estimated scattering contribution was subtracted from the observed diffraction data using the SQUEEZE option in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148-155].
Project description:In the title compound, [Co(C(16)H(14)N(4)O)(2)](C(6)H(2)N(3)O(7))(2)·3CH(3)CN, the Co(II) ion is located on a crystallographic twofold rotation axis and is coordinated in a slightly distorted tetra-hedral environment by four N atoms from the two bidentate N-heterocycles. The crystal structure is stabilized by inter-molecular N-H⋯O and N-H⋯N hydrogen bonds. One of the acetonitrile solvent mol-ecules also lies on a twofold rotation axis.
Project description:The title compound, [Ru(C10H8N2)2(C16H12N4O)](BF4)2·3CH2Cl2, crystallizes with one complex dication, two BF4 (-) counter-anions and three di-chloro-methane solvent mol-ecules in the asymmetric unit. The central Ru(II) atom adopts a distorted octa-hedral coordination sphere with two 2,2'-bi-pyridine (bpy) and one quinoline-2-carbaldehyde (pyridine-2-carbon-yl)hydrazone (HL) ligand. The hydrazone ligand has a Z form and coordinates to the Ru(II) atom via the amide-O and imine-N atoms, affording a planar five-membered chelate ring, while its pyridine-N and quinoline-N donor atoms in the substituents are non-coordinating. The hydrazone N-H group forms an intra-molecular hydrogen bond with the quinoline-N atom. In the crystal, the quinoline moiety of HL shows the shortest π-π stacking inter-action with the pyridine substituent of HL in a neighbouring complex, the centroid-to-centroid distance being 3.793 (3) Å.
Project description:In the title compound, [Cu(C(46)H(34)N(6))(CO)]PF(6)·0.75CH(2)Cl(2)·0.25C(4)H(10)O, the Cu(I) atom is coordinated by three N atoms from the tridentate chelating tris-(3,5-diphenyl-pyrazol-1-yl)methane ligand (average Cu-N distance = 2.055 Å) and the C atom from a carbon monoxide ligand in a distorted tetra-hedral coordination geometry. The average N-Cu-N angle between adjacent pyrazole-ring-coordinated N atoms is 88.6°, while the average N-Cu-C angle between the pyrazole-bound N atom and the C atom of carbon monoxide is 126.3°. One of the 3-phenyl rings of the tris-(pyrazol-yl)methane ligand is disordered over two sites each with an occupancy factor of 0.50. The structure also exhibits disorder of the monosolvate that has been modeled with 0.75 CH(2)Cl(2) and 0.25 Et(2)O occupancy.
Project description:In the title compound, [Mn(2)O(C(18)H(18)ClN(4))(2)](PF(6))(2), the Mn atom is chelated by a tetra-dentate ligand via four N atoms, and further bonded to one chloride ion and one bridging oxide, to give a centrosymmetric cation and distorted octa-hedral coordination geometry.
Project description:The cation of the title salt, C(34)H(45)N(2) (+)·PF(6) (-), is a protonated form of an unsymmetrical overcrowded β-imino-amine. The observed bond lengths [C-N = 1.326 (4)-1.341 (4) Å and C-C = 1.383 (4)-1.391 (4) Å] suggest significant delocalization within the π system of the N C C C N backbone.
Project description:The structure of the tertiary amine tris-(1H-benzimidazol-2-ylmeth-yl)amine (C24H21N7, abbreviated ntb) has been previously reported twice as solvates, namely the monohydrate and the aceto-nitrile-methanol-water (1/0.5/1.5) solvate, both with the tripodal conformation formed via multiple hydrogen bonds. Now, we report the tri-methanol adduct, ntb·3CH3OH, where the amine has the stair conformation featuring one benzimidazole group oriented in the opposite direction from the other two. The asymmetric unit contains one-half amine, completed through the mirror plane m in space group Pmn21 to form the ntb mol-ecule, with the H atom for each imidazole moiety equally disordered between both N sites available in the imidazole ring. The asymmetric unit also contains one and a half methanol mol-ecules, one being placed in general position with the hy-droxy H atom disordered over two sites with occupancy ratio 1:1, while the other lies on the m mirror plane, and has thus its hy-droxy H atom disordered by symmetry. As in the previously reported solvates, all imine and amine groups of the ntb mol-ecules and the methanol mol-ecules are involved in N-H⋯O and O-H⋯N hydrogen bonds. In the title compound, however, the involved H atom is systematically a disordered H atom provided by an imidazole group or a methanol mol-ecule.
Project description:The title compound, (C(6)H(21)N(4))[TiF(6)]F, was synthesized by the reaction of TiO(2), tris-(2-amino-ethyl)amine, HF and ethanol at 463 K in a microwave oven. The crystal structure consists of two crystallographically independent [TiF(6)](2-) anions, two fluoride anions and two triply-protonated tris-(2-amino-ethyl)-amine cations. The Ti atoms are coordinated by six F atoms within slightly distorted octa-hedra. The anions and cations are connected by inter-molecular N-H⋯F hydrogen bonds.
Project description:In the title compound, [Ru(C(5)H(4)NO)(C(10)H(8)N(2))(2)]PF(6)·0.5C(6)H(6), the Ru(2+) cation has a distorted octa-hedral RuN(5)O coordination environment. This complex is more distorted than the closely related ruthenium complex containing a pyridine-2-thiol-ate ligand [Santra et al. (1997 ▶). J. Chem. Soc. Dalton Trans. pp. 1387-1393]. The distortion is caused by the difference in size between the O and S atoms. The benzene solvent mol-ecule is situated on a twofold rotation axis.