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Fluorine (F) - Element Data, Properties, Uses, FAQs

Fluorine (F) - Element Data, Properties, Uses, FAQs

2016年4月14日

The 'H NMR spectrum of fluorene has signals at δ 3.8 and δ 7.2-7.7 in a 1: 4 ratio. After heating with NaOCH3 in CH3OD at reflux for 15 minutes the signals at δ 7.2-7.7 remained, but the one at δ 3.8 had disappeared. Suggest an explanation and write a mechanism for this observation.

The 'H NMR spectrum of fluorene has signals at δ 3.8 and δ 7.2-7.7 in a 1: …

2022年1月14日

What is the solubility of Fluorene in methanol g/ml ? thanks... | Filo

What is the solubility of Fluorene in methanol g/ml ? thanks... | Filo

In an evaluation of a method for the determination of fluorene in sea-water, a synthetic sample of sea-water was spiked with 50 ng ml^-1 of fluorene. Ten replicate determinations of the fluorene concentration in the sample had a mean of 49.5 ng ml^-1 with a standard deviation of 1.5 ng ml^-1. (Gonsález, M. A. and López, M. H. 1998. Analyst 123: 2217) Calculate the 95 % confidence limits of the mean. Is the spiked value of 50 ng ml^-1 within the 95 % confidence limits? | Numerade

In an evaluation of a method for the determination of fluorene in sea-wate…

2022年2月9日

SOLVED:The 'H NMR spectrum of fluorene has signals at δ3.8 and δ7.2-7.7 in a 1: 4 ratio. After heating with NaOCH3 in CH3 OD at reflux for 15 minutes the signals at δ7.2-7.7 remained, but the one at δ3.8 had disappeared. Suggest an explanation and write a mechanism for this observation.

SOLVED:The 'H NMR spectrum of fluorene has signals at δ3.8 and δ7.…

2021年3月6日

If column chromatography was performed on a mixture of fluorene... | Filo

If column chromatography was performed on a mixture of fluorene... …

已浏览 5752 次2024年5月11日

Thin Layer Chromatography: A Complete Guide to TLC

Thin Layer Chromatography: A Complete Guide to TLC

2020年1月2日

chemistryhall.com

SOLVED: For each of the following pairs of solute and solvent, predict w…

2021年8月18日

Column Chromatography

已浏览 36.3万次1 个月前

Protecting Groups for Amines - Carbamates

2018年6月7日

masterorganicchemistry.com

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