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Amide Complexes (amide + complex)

Distribution by Scientific Domains

Polymers and Materials Science	50%
Chemistry	50%

Selected Abstracts

Tin(IV) Bis(perfluoroalkanesulfonyl)amide Complex as a Highly Selective Lewis Acid Catalyst for Baeyer,Villiger Oxidation Using Hydrogen Peroxide in a Fluorous Recyclable Phase.

CHEMINFORM, Issue 41 2003
Xiuhua Hao
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Yttrium(III) complex as a highly active catalyst for lactide polymerization

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 22 2006
Linda M. Hodgson
The synthesis, characterization, and X-ray crystal structure of a well-defined yttrium(III) amide complex with the bis(thiophosphinic amide) ligand is reported. The new complex exhibits high rates and good control for lactide polymerization. The polymerization kinetics and mechanism are studied under a range of different conditions, and these show that even under mild conditions this complex exhibits polymerization rates among the fastest known. [source]

Liquid-Injection MOCVD of ZrO2 Thin Films using Zirconium Bis(diethlyamido)-bis(di- tert -butylmalonato) as a Novel Precursor,

CHEMICAL VAPOR DEPOSITION, Issue 5 2006
R. Thomas
Abstract The stabilization of highly reactive amide complexes of zirconium diethylamide with malonates as chelating ligands leads to a stable six-coordinated monomeric complex which shows promise for CVD applications. This novel precursor, zirconium bis-(diethylamido)bis(di- tert -butylmalonato) zirconium, [Zr(NEt2)2(dbml)2], has been characterized and tested in a production-type MOCVD reactor for ZrO2 thin-film deposition. Up to 450,°C, the ZrO2 films are amorphous, and above 475,°C films they are crystalline. Atomic force microscopy (AFM) shows a lower roughness (,2.5Å) for as-deposited amorphous films compared to crystalline films (,6.0,Å); however, smooth crystalline films can be obtained by post-deposition annealing of amorphous films. Electrical properties are investigated for Pt/ZrO2/SiOx/Si capacitor structures. Relative dielectric permittivity reaches a bulk value of 24, and leakage currents for typically 4,nm thick films are below 10,4,A,cm,2 at a bias of ,1,V. Hence, the precursor shows promising properties for possible application in the deposition of high- k gate oxide (MIS) and high- k dielectric (MIM) structures. [source]

Hydrocarbon-Soluble Calcium Hydride: A "Worker-Bee" in Calcium Chemistry

CHEMISTRY - A EUROPEAN JOURNAL, Issue 32 2007
Jan Spielmann
Abstract The reactivity of the hydrocarbon-soluble calcium hydride complex [{CaH(dipp-nacnac)(thf)}2] (1; dipp-nacnac=CH{(CMe)(2,6- iPr2C6H3N)}2) with a large variety of substrates has been investigated. Addition of 1 to CO and CN functionalities gave easy access to calcium alkoxide and amide complexes. Similarly, reduction of the CN bond in a cyanide or an isocyanide resulted in the first calcium aldimide complexes [Ca{NC(H)R}(dipp-nacnac)] and [Ca{C(H)NR}(dipp-nacnac)], respectively. Complexation of 1 with borane or alane Lewis acids gave the borates and alanates as contact ion pairs. In reaction with epoxides, nucleophilic ring-opening is observed as the major reaction. The high reactivity of hydrocarbon-soluble 1 with most functional groups contrasts strongly with that of insoluble CaH2, which is essentially inert and is used as a common drying agent. Crystal structures of the following products are presented: [{Ca{OC(H)Ph2}(dipp-nacnac)}2], [{Ca{NC(H)Ph}(dipp-nacnac)}2], [{Ca{C(H)NC(Me)2CH2C(Me)3}(dipp-nacnac)}2], [{Ca{C(H)NCy}(dipp-nacnac)}2], [Ca(dipp-nacnac)(thf)]+[H2BC8H14], and [{Ca(OCy)(dipp-nacnac)}2]. The generally smooth and clean conversions of 1 with a variety of substrates and the stability of most intermediates against ligand exchange make 1 a valuable key precursor in the syntheses of a wide variety of ,-diketiminate calcium complexes. [source]