Effect of Temperature on thermodynamic parameters and chemical properties at adsorption process nitrite on the Graphene Nano surface, density functional theory method

The project is comparing four types of calculation derived graphene. That two of these derivatives of graphene carbon nitrite connection created the difference is only in the state of Para and meta carbons connectivity state. But other derivatives first silicon-carbon alternatives in the meta and para position, then nitrite is added to the silicon. To evaluate the effect of silicon element to absorb energy and other thermodynamic parameters in the derivatives compared with them

Dibromido(6-methyl-2,2′-bipyridine-κ2 N,N′)zinc(II)

In the title compound, [ZnBr2(C11H10N2)], the ZnII atom is four-coordinated in a distorted tetra­hedral configuration by two N atoms from a 6-methyl-2,2′-bipyridine ligand and two terminal Br atoms. Weak inter­molecular C—H⋯Br hydrogen bonds and π–π stacking inter­actions between the pyridine rings [centroid–centroid distances = 3.763 (5) and 3.835 (6) Å] contribute to crystal-packing effects

The Effect of Financial Distress on the Investment Behavior of Companies Listed on Tehran Stock Exchange

The purpose of this study was to determine the effect of financial distress on investment behavior for the years of 2011 to 2016. The statistical population of the research is Tehran Stock Exchange. According to the systematic elimination method, 104 companies have been selected as the statistical sample. In this research, financial distress is independent variable and corporate investment behavior is dependent variable and investment opportunities is considered as interactive variable. The present research is an applied research and in terms of methodology is a correlational study. In this research, for collecting data and information, library method and in the research data section, financial statements, explanatory notes and monthly magazine of stock exchange, and in order to describe and print the data collected, descriptive and inferential statistics and to analyze the data, pre-test variance analysis, F-limmer test, Hausman test and Jarck-Bera test, and then multivariate regression test for confirmation and rejection of research hypotheses (EViews software) were used. The results showed that firms with less investment opportunities tend to be less likely to invest, in addition distressed financially firms with more investment opportunities are more likely to increase investment

Theoretical study of the effect of the element silicon, the adsorption enthalpy nitrite, on the surface of graphene nanostructure

The project is comparing four types of calculation derived graphene. To evaluate the effect of silicon element to Thermochemistry parameters of absorption of nitrite in these derivatives. Two of these derivatives of graphene carbon nitrite connection made, the difference is only in the state of Para and meta carbons connectivity state (named P & M). But in other Derivations first put silicon instead carbon in the meta and para position(named GER Si2 para & GER Si2 metha), then nitrite is added to the silicon(named P* & M*)

Dichlorido(6,6′-dimethyl-2,2′-bipyridine-κ2 N,N′)zinc(II)

In the title compound, [ZnCl2(C12H12N2)], the complete mol­ecule is generated by crystallographic mirror symmetry, with the Zn atom and both chloride ions lying on the reflecting plane, yielding a distorted ZnN2Cl2 tetra­hedral coordination for the metal ion. In the crystal, there are π–π contacts between the pyridine rings [centroid–centroid distance = 3.7857 (17) Å]

(6,6′-Dimethyl-2,2′-bipyridine-κ2 N,N′)diiodidozinc(II)

The complete mol­ecule of the title compound, [ZnI2(C12H12N2)], is generated by crystallograpic twofold symmetry, with the ZnII atom lying on the rotation axis. The ZnII atom is coordinated by the N,N-bidentate 6,6′-dimethyl-2,2′-bipyridine ligand and two iodide ions, resulting in a distorted ZnN2I2 tetra­hedral geometry for the metal. In the crystal, there are weak π–π contacts between the pyridine rings [centroid–centroid distance = 3.978 (3) Å]

Tetra­kis(6-methyl-2,2′-bipyridine)-1κ2 N,N′;2κ2 N,N′;3κ2 N,N′;4κ2 N,N′-tetra-μ-nitrato-1:2κ2 O:O′;2:3κ3 O:O′,O′′;2:3κ3 O,O′:O′′;3:4κ2 O:O′-tetra­nitrato-1κ4 O,O′;4κ2 O,O′-tetra­lead(II)

In the tetranuclear centrosymmetric title compound, [Pb4(NO3)8(C11H10N2)4], irregular PbN2O5 and PbN2O4 coordination polyhedra occur. The hepta­coordinated lead(II) ion is bonded to two bidentate and one monodentate nitrate ion and one bidentate 6-methyl-2,2′-bipyridine (mbpy) ligand. The six-coordinate lead(II) ion is bonded to one bidentate and two monodentate nitrate anions and one mbpy ligand. In the crystal, bridging nitrate anions lead to infinite chains propagating in [111]. A number of C—H⋯O hydrogen bonds may stabilize the structure

Trichlorido(5,5′-dimethyl-2,2′-bipyridine-κ2 N,N′)(methanol-κO)indium(III)

In the mol­ecule of the title compound, [InCl3(C12H12N2)(CH4O)], the InIII atom is six-coordinated in a distorted octa­hedral configuration by two N atoms from the chelating 5,5′-dimethyl-2,2′-bipyridine ligand, one O atom from a methanol molecule and three Cl atoms. In the crystal structure, inter­molecular O—H⋯Cl hydrogen bonds link the mol­ecules into chains parallel to [001]

Dichlorido(6-methyl-2,2′-bipyridine-κ2 N,N′)zinc(II)

In the mol­ecule of the title compound, [ZnCl2(C11H10N2)], the ZnII atom is four-coordinated in a distorted tetra­hedral configuration by two N atoms from the 6-methyl-2,2′-bipyridine ligand and by two Cl atoms. There are π–π contacts between the pyridine ring and the five-membered ring, and also between the pyridine rings, [centroid–centroid distances = 3.685 (3) and 3.757 (3) Å, respectively]

Di-μ-bromido-bis­[bromido(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)mercury(II)]

The asymmetric unit of the title compound, [Hg2Br4(C12H12N2)2], contains one half-mol­ecule. The HgII atom is five-coordinated in a trigonal–bipyramidal configuration by two N atoms from the chelating 4,4′-dimethyl-2,2′-bipyridine ligand, two bridging Br and one terminal Br atom, leading to a centrosymmetric dimeric mol­ecule. There is a π–π contact between the pyridine rings [centroid-to-centroid distance = 3.756 (5) Å]