The invention relates to a novel process for the manufacture of very low molecular weight polyphenylene ether resin, typically within the intrinsic viscosity range of about 0.08 dl/g to about 0.16 dl/g as measured in chloroform at 25°... AJFM Braat,H Ingelbrecht,R Trion - US 被引量: ...
These compounds contribute with vegetative, herbaceous, green bell pepper or earthy notes to the aroma of some wines (e.g., Cabernet Sauvignon) and possess sensory thresholds in the range of 1–2 ng l–1. These compounds can be determined by HS–SPME with DVB/CAR/PDMS fiber95,96 or CAR...
Highly Efficient Phosphorescent Furo[3,2-c]pyridine Based Iridium Complexes with Tunable Emission Colors over the Whole Visible Range A series of highly efficient phosphorescent Ir complexes with tunable emission colors over the whole visible range have been designed and synthesized based... Z Yan,Y...
Synthesis of mono- and diketones as carbonyl group derivatives in biomacromolecular chemistry is very essential task for industrial biotechnology applications. However, there are various techniques to synthesize such carbonyl groups, the most common and efficient methods are the chemical oxidation of alcoho...
Surface hydrides (t-H, μ-H, μ3-H) generally resonate in the range δH –5 to –30 ppm, making their detection rather clear also in the presence of several organic protons (Table 1) [17]. 1H NMR data for semi-interstitial and fully interstitial hydride MCCs are far more scarce than...
Long-range interactions. Part III. A comparison of arene and olefin as neighbouring groups towards an allylic anion Rates of hydrogen-isotope exchange at the 4-position of 6,7-benzobicyclo[3,2,1]octa-2,6-diene (Ia) have been measured and compared with corresponding values for the parent bi...
For the unimolecular decomposition of 2,2-dimethylpropionyl radicals, the Arrhenius expression kdis(t-butyl-CO)=6.0×1012 exp(−41.6 kJ mol−1/RT) s−1 (2σ) was derived for the temperature range 293–317 K and a total pressure of 1 bar (M=N2+O2). The results on kdis/kO...
In this temperature range all complexed olefin ligands with the exception of ( Z )-cyclooctene ( cf. [11]) show an averaged C s -symmetry on the NMR. time scale. About 115 K the tetracarbonyliron group gives rise to three 13 C-signals in a ratio of 1:1:2 for the complexes of (...
The average recovery was 96 % (92–107 %) for targeted VOCs and 95 % (91–105 %) for aldehydes, with the acceptable range of 80–120 %. The acceptance criteria of the R2 from the calibration curves for each compound ranged from 0.998 to 0.999. 2.6. Health risk assessment We conducted...
A range of bis-facial tridentate chelate complexes of type [Fe((R-pz)3CH)((3,5-Me2pz)3CH)](BF4)2has been characterised that contain two different tris-pyra... B Moubaraki,BA Leita,GJ Halder,... - 《Dalton Trans》 被引量: 53发表: 2007年 Predominantly σ-Bonded Metal Carbonyl Cat...