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Date: 5-8-2019
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Date: 13-8-2018
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Date: 13-8-2019
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The 12C isotope of carbon - which accounts for up about 99% of the carbons in organic molecules - does not have a nuclear magnetic moment, and thus is NMR-inactive. Fortunately for organic chemists, however, the 13C isotope, which accounts for most of the remaining 1% of carbon atoms in nature, has a magnetic moment just like protons. Most of what we have learned about 1H-NMR spectroscopy also applies to 13C-NMR, although there are several important differences.
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4 أسباب تجعلك تضيف الزنجبيل إلى طعامك.. تعرف عليها
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أكبر محطة للطاقة الكهرومائية في بريطانيا تستعد للانطلاق
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أصواتٌ قرآنية واعدة .. أكثر من 80 برعماً يشارك في المحفل القرآني الرمضاني بالصحن الحيدري الشريف
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