Magnetic Resonance Spectrosco py . The Configurarional Stability of Primary Grignard
نویسنده
چکیده
Detailed exuminution of the temperutLtre dependence of the n.m.r. spectra of 3,3-dimeth;,-lbut.,-lmagnesium chloride and bis(3,3-dimethvlbutyl)magnesium indicates that inversiott of configuration at the-CHzMg center oc' curs rapidly in ether solution at room temperature. Activation parameters for the inversiott reactiotts ure E,, : ]l t 2 kcal.f rnole, A : l}c'a = t'5 sec.-t, ond
منابع مشابه
Computational study of energetic, stability, and nuclear magnetic resonance of BN nanotube as a nanosensor
Now a day study on boron nitrid nanotubes are in considerable attetion due to their unique properties in different field of science. In this letter, after final optimization, thermodynamic properties analysis, stabilities, electronic structure and nuclear magnetic resonance parameters including σ isotropic and σ anisotropic tensors and asymmetric parameters of 15N and 11B nuclei are calculated....
متن کاملNuclear Magnetic Resonance Spectroscopy. Structure and Dynamic Character of Allylic Grignard Reagents
Studies have been made of the nuclear magnetic resonance spectra of several allylic Grignard reagents. The Grignard reagent prepared from y,y-dimethylallyl bromide appears best formulated as an equilibrium mixture of y,y-dimethylallylmagnesium bromide and qcx-dimethylallylmagnesium bromide, in which the former is the major component. The rate of interconversion of the allylic isomers is rapid o...
متن کاملAn Overview of Cobalt Ferrite Core-Shell Nanoparticles for Magnetic Hyperthermia Applications
Cobalt ferrite nanoparticles (CoFe2O4) are well known for some distinctive characteristics such as high magnetic permeability and coercive force, good saturation magnetization, excellent physical, and chemical stability, which make them so attractive for magnetic storage, magnetic resonance imaging (MRI), drug delivery, optical-magnetic equipment, radar absorbing materials...
متن کاملThe Glycolysis of Poly (ethylene terephthalate) Waste:Recovery of Terephthalic Acid by Magnetic FeO@APTS Nanoparticle
In this research, the chemical recycling of terephthalic acid from PET waste by using nano Fe3O4@Py-APTS as solid support was reported. The performance of organically modified nano magnetic was examined in detail and the results were compared with unsupported reactions as the model. By using the solid support, the required time for complete glycolysis, consumption of solvent and catalyst, decre...
متن کاملSize Reproducibility of Gadolinium Oxide Based Nanomagnetic Particles for Cellular Magnetic Resonance Imaging: Effects of Functionalization, Chemisorption and Reaction Conditions
We developed biofunctionalized nanoparticles with magnetic properties by immobalizing diethyle-neglycol (DEG) on Gd2O3, and PEGilation of small particulate gadolinium oxide (SPGO) with two me-thoxy-polyethyleneglycol-silane (mPEG-Silane 550 and 2000 Da) using a new supervised polyol route, described recently. In conjunction to the previous study to achieve a high quality synthesis and increase ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2010