[ni(dmg)2]2+
By use of synchrotron radiation, powder X-ray diffraction of one-dimensional bis(dimethylglyoximato)nickel(II), Ni(dmg)2, has been studied at room temperature and at high pressure. The lattice constants with an orthorhombic structure for Ni(dmg)2 monotonically decrease with increasing pressure up to 7.4 GPa; the linear compressibility of each axis is estimated. The magnitude of the linear compressibility increases in the order c > b > a in the low-pressure region. However, the lattice constant along the b-axis is smaller than that along the a-axis at pressures greater than 6 GPa. A Ni–Ni distance along the c-axis abruptly decreases from 3.255 Å at ambient pressure to 2.82 Å at 7.4 GPa. A bulk modulus of Ni(dmg)2 is obtained from the volume versus pressure curve fitted by a Birch equation of state. The bulk modulus of this complex is very small, 8.0 GPa. Ni(dmg)2 is a very compressible compound. The electrical and optical properties of Ni(dmg)2 have been investigated at high pressures. The dπ–π* and 3d–4p bands shift to a lower energy region with increasing pressure. The absorption peak of the 3d–4p band is very sensitive to pressure. The resistivity of Ni(dmg)2 decreases monotonically with increasing pressure up to 23 GPa. The lowest resistivity of this complex is about 50 Ω cm at around 23 GPa. These electrical and optical properties are closely related to the rapid shrinkage of the Ni–Ni distance with increasing pressure.
Ni(dmg)2 2 Weeks
- Solubility behavior of some copper(II)- and nickel(II)-vic-dioximes John Edwin Caton Jr. Ni(DMG)2 was methylated by methyl iodide; hut Thilo and Friedrich (81) reported that they observed no reaction with either dimethyl sulfate or methyl iodide. Ni(DMG)^ does not.
- Examples of molecular weight computations: C14O162, S34O162. Definitions of molecular mass, molecular weight, molar mass and molar weight. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12).
What is the color of the following: 1) Ni(HDMG)2 2) K2Zn3Fe(CN)62(s) 3)BaCrO4(s) 4) CaC2O4(s) Expert Answer 100% (1 rating) Previous question Next question Get more help from Chegg. Get 1:1 help now from expert Chemistry tutors. Filtering, drying and weighing the Ni(DMG) 2 precipitate (2 hrs) Parts A and B can be done in parallel and is suggested to save time. EXPERIMENTAL PROCEDURE NOTE: Do the drying of ore the lab session before you are scheduled to do the experiment. Transfer the unknown nickel ore sample into one weighing bottle and bring to.
PowerISO: Make Bootable Mac Install USB on Windows 10/8/7 This Windows utility allows you do create bootable USB from DMG on a PC. You can also edit the DMG or extract the contents, and there's also an option to copy it to a disk. Windows 10 dmg download.
| Names | |
|---|---|
| IUPAC name nickel;N-[(Z)-3-nitrosobut-2-en-2-yl]hydroxylamine | |
| Other names | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| EC Number | |
PubChemCID | |
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| Properties | |
| C8H14N4NiO4 | |
| Molar mass | 288.917 g·mol−1 |
| Appearance | red solid |
| Density | 1.698 g/cm3 |
| Hazards | |
| GHS pictograms | |
| GHS Signal word | Warning |
| H315, H317, H319, H335, H351 | |
| P201, P202, P261, P264, P271, P272, P280, P281, P302+352, P304+340, P305+351+338, P308+313, P312, P321, P332+313, P333+313, P337+313, P362, P363, P403+233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Nickel bis(dimethylglyoximate) is the coordination complex with the formula Ni[ONC(CH3)C(CH3)NOH]2. The compound is a bright red solid. It achieved prominence for its use in the qualitative analysis of nickel.[1]
Ni(dmg)2 2+
Structure[edit]
Nickel(II) is square planar.[2] It is surrounded by two equivalents of the conjugate base (dmgH−) of dimethylglyoxime (dmgH2). The pair of organic ligands are joined through hydrogen bonds to give a macrocyclic ligand. The complex is distinctively colored and insoluble leading to its use as a chelating agent in the gravimetric analysis of nickel.
The use of dimethylglyoxime as a reagent to detect nickel was reported by L. A. Chugaev in 1905.[3]
References[edit]
Ni(dmg)2 2 Download
- ^Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN978-0-08-037941-8.
- ^Donald E. Williams, Gabriele Wohlauer, R. E. Rundle (1959). 'Crystal Structures of Nickel and Palladium Dimethylglyoximes'. J. Am. Chem. Soc. 81: 755–756. doi:10.1021/ja01512a066.CS1 maint: uses authors parameter (link)
- ^Lev Tschugaeff (1905). 'Über ein neues, empfindliches Reagens auf Nickel'. Berichte der deutschen chemischen Gesellschaft. 38 (3): 2520–2522. doi:10.1002/cber.19050380317.