Single-shot titrations and reaction monitoring by slice-selective NMR spectroscopy.
نویسندگان
چکیده
A new method, based on slice-selective NMR spectroscopy of inhomogeneous mixtures, is introduced to perform NMR titrations and reaction monitoring in a single experiment. The method was applied to the titration of a lithium salt with 12-crown-4, and to the reaction of nBuLi with N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDTA).
منابع مشابه
Single-shot line scan imaging using stimulated echoes.
A new high-speed MRI method is described for single-shot line scan imaging (LSI) based on stimulated echoes (STE). To allow for multislice imaging, the technique comprises a series of slice-selective preparation pulses (each corresponding to the first RF pulse of a STE sequence), a slab-selective refocusing pulse (second RF pulse), and multiple line-selective read pulses (third RF pulses). An a...
متن کاملSynthesis, characterization and selective oxidation using a new copper (II) Schiff base complex derived from Alanine and 4-chloro3- formyl coumarin
A novel Schiff-base ligand (L: 2-[(4-chloro-2-oxo-2H-chromen-3-ylmethylene)-amino] propionic acid) was prepared from the reaction of 4-chloro3-formylcoumarin and alanine amino acid. Copper (II) complex was synthesized from the reaction of the ligand with Cu (OAc)2. H2O in ethanol. The ligand and its metal complex were characterized by elemental analysis (CHN), ICP, thermal analysis (TGA), Fouri...
متن کاملNMR analysis of weak molecular interactions using slice-selective experiments via study of concentration gradients in agar gels.
Weak molecular interactions can be localized and quantified using a single NMR experiment analysing concentration gradients generated in agar gels. The spectra from various cross-sections along the gradient were obtained using a slice-selective pulse sequence realisable with standard NMR equipment.
متن کاملSimplifying Proton NMR Spectra by Instant Homonuclear Broadband Decoupling**
NMR spectroscopy is a versatile tool to determine structural, chemical, and physical properties of molecules. One-dimensional H NMR spectra probably represent the most often acquired type of NMR data. However, compared to other NMR detectable nuclei, H spectra typically suffer from low resolution and severe signal overlap, mainly arising from extensive scalar coupling between protons. Homonucle...
متن کاملZirconium Dodecylphosphonate: Selective and Constructive Catalyst for Preparation of 2-Alkyl Benzoxazoles from Aliphatic Carboxylic Acids
In this study, zirconium dodecylphosphonate was synthesized by the reported method in scientific literature. 2-Alkylbenzoxazoles were prepared from aliphatic carboxylic acids and 2-aminophenol in the presence of this catalyst under solvent-free conditions at 100°C. Their structures were recognized by IR, 1H NMR, and 13C NMR. Then, we used aromatic carboxylic acids in t...
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:
- Chemical communications
دوره 51 7 شماره
صفحات -
تاریخ انتشار 2015