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2013-05-23 12:21
求翻译：General. The reagents and solvents used were of commercialorigin (Wako Chemicals, Tokyo Chemical Industry, Sigma, andAldrich) and were employed without further puri?cation. The1HNMR spectra and13CNMR spectra were recorded with a Varian AS 400 Mercury spectrometer. Chemical shifts are expressed in ppm downfield shift fr是什么意思？ 待解决
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- 离问题结束还有
General. The reagents and solvents used were of commercialorigin (Wako Chemicals, Tokyo Chemical Industry, Sigma, andAldrich) and were employed without further puri?cation. The1HNMR spectra and13CNMR spectra were recorded with a Varian AS 400 Mercury spectrometer. Chemical shifts are expressed in ppm downfield shift fr
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2013-05-23 12:21:38
干事。使用的试剂和溶剂commercialorigin（和光化工，东京化成工业，西格玛，andAldrich）和聘用未经进一步纯化？阳离子。 The1HNMR光谱and13CNMR光谱记录与瓦里安为400水星谱仪。化学位移以ppm TMS（δscale）前冲转变表示。低andhigh分辨率masss pectra的JEOL MS700 masss pectrometer.The所有反应的进展获得了监测硅胶薄layerchroma tography 60 F254（0.25毫米，默克公司）。柱层析硅胶gel60（0.0630.200毫米，默克公司），所有合成化合物的纯度约为98％（基于on1H核
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2013-05-23 12:23:18
一般。 剂和溶剂的使用的是commercialorigin(瓦科化学品、东京化工、西格玛、andaldrich)和受雇而无须进一步Puri? 阳离子。 13比拉抵抗力量全国委员会所提议的.1hnmr光谱和光谱录得400的瓦里安作为水银质谱仪。
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
正在翻译，请等待...
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2013-05-23 12:28:18
干事。使用的试剂和溶剂commercialorigin（和光化工，东京化成工业，西格玛，andAldrich）和聘用未经进一步纯化？阳离子。 The1HNMR光谱and13CNMR光谱记录与瓦里安为400水星谱仪。化学位移以ppm TMS（δscale）前冲转变表示。低andhigh分辨
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