منابع مشابه
Stereochemistry and catalysis with zirconium complexes
Monoand bis(q-cyclopentadieny1)zirconium complexes show interesting stereochemical features with regard to their use in organometallic and organic synthesis as well as in catalysis. An example is described where the zirconocene unit serves to stabilize a planar tetracoordinate carbon center. Next, various building blocks (a metal carbonyl, an organic carbonyl compound, a conjugated diene, plus ...
متن کاملZirconium complexes bearing a tetradentate dipyrrolyl ligand.
Using a tetradentate, dianionic ligand several new zirconium complexes have been prepared. These pyrrolyl compounds, unlike their titanium analogues, are inactive in hydrohydrazination catalysis. However, they are quite stable, and their reactivity with H2NR, where R = Ph, C6H11, and NHPh, is reported here. Two of the complexes were characterized by X-ray diffraction.
متن کاملBis(triethylammonium) chloranilate
IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: bis-(tri-ethyl-ammonium) 2,5-di-chloro-3,6-dioxo-cyclo-hexa-1,4-diene-1,4-diolate], 2C6H16N(+)·C6Cl2O4 (2-), the chloranilate anion lies on an inversion center. The tri-ethyl-ammonium cations are linked on both sides of the anion via bifurcated N-H⋯(O,O) and weak C-H⋯O hydrogen bonds to give a centrosymmetric 2:1 aggregate. The 2:...
متن کاملZirconium enolatoimine complexes in olefin polymerization.
Zirconium complexes with enolatoimine ligands bearing an electron-withdrawing trifluoromethyl group on the alkoxy moiety [κ²-N,O-{2,6-R₂N=C(CH₃)C(H)=C(O)CF₃]₂ZrCl₂ (2a, R = H; 2b, R = F; 2c, R = CH₃; 2d, R = (i)Pr) were prepared. The isopropyl substituents hinder rotation in solution for 2d, and result in a trans-arrangement of the N-donors in the solid state. Catalyst activities are similar fo...
متن کاملTriethylammonium hydrogen chloranilate
IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND (SYSTEMATIC NAME: triethyl-ammonium 2,5-dichloro-4-hy-droxy-3,6-dioxo-cyclo-hexa-1,4-dien-1-olate), C(6)H(16)N(+)·C(6)HCl(2)O(4) (-), two hydrogen chloranilate anions are connected by a pair of bifurcated O-H⋯O hydrogen bonds into a dimeric unit. The triethyl-ammonium cations are linked on both sides of the dimer via bifurcated N-H⋯O hydrogen bonds...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 1951
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja01151a060