Schraml Jan, Blechta Vratislav, Sýkora Jan, Soukupová Ludmila, Curínová Petra, Pronek David, Lachman Jaromír
Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 16502, Prague 6, Czech Republic.
Magn Reson Chem. 2005 Oct;43(10):829-34. doi: 10.1002/mrc.1638.
The lines in (29)Si NMR spectra of silylated polyphenols and some other compounds are difficult to assign owing to the absence of couplings with protons outside the silyl group. The assignment can be derived through small (n)J((29)Si, (13)C) couplings (n > 1). Using a previously described method for measurements of these couplings, the assignment procedure is demonstrated here on three examples of trimethylsilylated phenols: 7-hydroxyflavone, ferulic acid, and quercetin. In some cases the procedure can be used to identify carbon atoms to which the siloxy groups are attached.
由于硅烷基以外的质子没有耦合作用，硅烷化多酚和其他一些化合物的(29)Si NMR谱线难以归属。归属可通过小的(n)J((29)Si,(13)C)耦合(n>1)得出。使用先前描述的测量这些耦合的方法，本文在三甲基硅烷化酚的三个例子上展示了归属过程：7-羟基黄酮、阿魏酸和槲皮素。在某些情况下，该过程可用于识别与硅氧基相连的碳原子。
