Reaction of (N(3)N)ZrPHPh (N(3)N=N(CH(2)CH(2)NSiMe(3))(3)(3-)) with PhCH(2)N[triple bond]C affords the 1,1-insertion product (N(3)N)Zr[C(PHPh)=NCH(2)Ph], which thermally rearranges to the phosphaalkene-containing complex, (N(3)N)Zr[N(CH(2)Ph)C(H)=PPh].

Ethylene polymerization by Cp2ZrCl2-B(C6F5)3-TEA catalyst system using low Al/Zr ratio has been studied with varying ethylene pressure, catalyst concentration, Al/Zr ratio, and reaction temperature. The study showed that there was an optimum condition for each variable at which maximum productivity was obtained. It was proposed that there were two competing reactions, the catalyst activation an...

Temperature programmed desorption TPD has been used to investigate the behavior of cyclohexane C6H12 on Zr 0001 and the effects of 500 eV electron bombardment on its desorption characteristics. Following adsorption at 150 K, molecular desorption above 600 K suggests exceptionally strong interaction between C6H12 and Zr 0001 . These high-temperature desorption features shift to higher temperatur...

The electron-impact widths for 30 Zr III lines were calculated using the modified semi-empirical (MSE) method. For two Zr II and four Zr III astrophysically important UV lines, only electron-impact widths are given, since for their calculation the experimental oscillator strengths were used and consequently the accuracy of the parameters is lower than in the case of other lines. The influence o...

The effects of dual Zr & N plasma immersion ion implantation (PIII) on the corrosion behavior of WE43Mg alloy are evaluated in simulated body fluid (SBF) and cell culture medium (cDMEM). Zr & N PIII improves the corrosion resistance of WE43 which exhibits smaller icorr, larger R1 & R2, smaller CPE2, and larger phase angle maxima in SBF and cDMEM. The Zr & N PIII WE43 samples exhibit 12-folds de...

where CF and VF are the filter capacitance and voltage amplitude. See Fig. 1(a). To compute the ratio Vq/VF we use voltage division. We make the crucial observation that to calculate the qubit damping we must analyze the circuit impedances at the qubit frequency. Because the qubit is off resonance from the measurement resonator, the measurement resonator’s impedance Zr is lower than the impedan...

Dedicated to Prof. Dr. h. c. H. Behrens on his 65th birthday The interaction of (^-CsHsfeMC^ (M = Zr, Hf) with excess CH2-PPh3 in THF gives (??5-C5H5)2MCl(CH-PPh3) as yellow orange needles. Nuclear magnetic resonance spectra show hindered rotation about the P-C bond with = 8.6 kcal/mole for M = Zr and 8.3 kcal/mole for M — Hf, respectively. The X-ray molecular structure of the zirconium complex...

Emerging contaminants in the environment have caused enormous concern in the last few decades, and among them, antibiotics have received special attention. On the other hand, adsorption has shown to be a useful, low-cost, and eco-friendly method for the removal of this type of contaminants from water. This work is focused on the study of ciprofloxacin (CPX) removal from water by adsorption on p...

Two alkyl and aryl substituted five-membered zirconacycloallenoids underwent a typical σ-alkyl metallocene reaction with B(C6F5)3, namely cleavage of the Zr-C(sp(3)) bond with formation of zwitterionic (η(2)-allenyl)zirconium/alkylborate products. Both products were characterized by X-ray crystal structural analyses.

K. Zberecki,1 P. Magierski,1 P.-H. Heenen,2 and N. Schunck3,4 1Faculty of Physics, Warsaw University of Technology, ul. Koszykowa 75, PL-00-662 Warsaw, Poland 2Service de Physique Nucléaire Théorique, U.L.B-C.P. 229, B-1050 Brussels, Belgium 3Institute of Theoretical Physics, ul. Hoza 69, PL-00-631 Warsaw, Poland 4University of Surrey, Guildford GU2 7XH, United Kingdom (Received 21 April 2006; ...