منابع مشابه
Chemical vapour deposition of group-VIB metal dichalcogenide monolayers: engineered substrates from amorphous to single crystalline.
As structural analogues of graphene but with a sizeable band gap, monolayers of group-VIB transition metal dichalcogenides (MX2, M = Mo, W; X = S, Se, Te, etc.) have emerged as the ideal two dimensional prototype for exploring fundamental issues in physics such as valley polarization, and for engineering a wide range of nanoelectronic, optoelectronic and photocatalytic applications. Recently, c...
متن کاملO ) , IR and Raman Studies of Poly - nuclear Carbonyls Transition Metal Carbonyls : A DFT Application
DFT implemented in ADF 2012.01 was used to know about the relative spatial displacements of three/four metals and the surrounding12 terminal and bridging CO groups in 5 poly-nuclear carbo nyls:[M3(CO)12],(M=Ru,Os),[Ir4(CO)12], [Fe3(CO)12] and [Rh4(CO)12]. After optimization, the software was first run using the “NMR Program” with Single Point, Default, None, Collinear, Nosym using TZP or TZ2P B...
متن کاملSynthesis of chelating bidentate and tridentate cyano ligands and their complexes with Group VII metal carbonyls
Two new bidentate cyano ligands, DiCN-3 (2) and DEN-4 (3) (a,w-bis(2-cyanophenoxy)propane and butane, respectively), have been prepared. These ligands and the ethane analogue DEN-2 (1) react with Mn(C0)5Br to afford complexes of the composition Mr~(cO)~(DicN-n)Br (n= 2, 9; n = 3, 10; n = 4, 11). Complexes 9 and 10 appear to be mononuclear and contain 13and 14-membered chelate rings, respectivel...
متن کاملStructure, photophysics, electrochemistry, DFT calculation, and in-vitro antioxidant activity of coumarin Schiff base complexes of Group 6 metal carbonyls.
N-[(2-Pyridyl)methyliden]-6-coumarin (L) is synthesized by the condensation of 6-aminocoumarin and pyridine-2-carboxaldehyde. Group-6 tetracarbonyl complexes, [M(CO)(4)(L)] (M=Cr, Mo, and W) are synthesized and characterized by mass spectrometry and NMR, FT-IR and UV-visible spectroscopy. X-ray crystal structure of [Cr(CO)(4)(L)] shows N(pyridine), N(imine) chelation to chromium(0). A supramole...
متن کاملChemistry of the Alkaline Earth Metal Enolates
Aldehydes, ketones, carboxylic esters, carboxylic amides, imines and N,N-disubstituted hydrazones react as electrophiles at their sp2-hybridized carbon atoms. These compounds also become nucleophiles, if they contain an H atom in the a-position relative to their C O or C N bonds. This is because they can undergo tautomerization to the corresponding enol as seen in Chapter 12. They are also C,H-...
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ژورنال
عنوان ژورنال: European Journal of Chemistry
سال: 2012
ISSN: 2153-2257,2153-2249
DOI: 10.5155/eurjchem.3.3.367-393.604