Although the melting point depression of confined cyclohexane is found to be less than previously assumed, this compound is still one of the most suitable candidates for NMR-based pore size determinations. However, pore sizes larger than approximately 50 nm in diameter will be difficult to ...
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Chemical NameSpiro<cyclohexane-1,4'-(furo<2,3-c<-5'H-pyridine)<-7'-oxo-6'-benzyl|Spiro[cyclohexane-1,4'-(furo[2,3-c]-5'H-pyridine)]-7'-oxo-6'-benzyl CAS No.79841-94-4 Molecular FormulaC19H21NO2 Molecular Weight295.382 LogP4.53 (Predicted) View More79841...
我们进一步利用二维 1H DQ NMR 来探究 NHPI 分子与沸石表面的相互作用。在 13ppm 左右的 1H 信号应该是由于被吸附的 NHPI 分子的 C=O 基团与沸石表面末端或桥接羟基之间的氢键相互作用(即, Si-OH, Al-OH 或表面有 Si-OH-Al 的痕迹)。此外,非对角的峰值对在(13.3,21.0) 和 (7.7,21.0)ppm,对应于氢键之...
英文别名:(1R,2R,3S,4R,5S)-ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cyclohexanecarboxylate CAS号:2125702-80-7 分子式:C16H29N5O4 分子量:355.43 详情请联系李经理: 电话(微信):18576690176 QQ:2851922763 常规配置COA、HPLC、H-NMR、MS,满足基本需求 ...
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(0.004 mmol) in 2 mL of solvent was injected into a SFMT reactor (volume = 1.5 mL). The reaction was conducted at 50°C under 18 W blue LED irradiation for 48 h, unless otherwise stated. a 0.2 M HX solution in CH3CN was used. b Yields based on analysis of the crude 1H NMR ...
All experiments were conducted under air, using commercially purchased analytical reagents and solvents which do not require further purification.1HNMR and13CNMR spectra were recorded on a Bruker spectrometer (at 400 and 100 MHz, respectively). TMS was used as reference for chemical shifts. High...
K. et al. Conformationally rigid trifluoromethyl-substituted α-amino acid designed for peptide structure analysis by solid-state 19F NMR spectroscopy. Angew. Chem. Int. Ed. 45, 5659–5661 (2006). CAS Google Scholar Wong, M. L. J., Mousseau, J. J., Mansfield, S. J. & Anderson, E...