Dear Colleage
Recently, one Ph D student had asked me the following question: why he couldn't obtain a single resonance for methyl protons in methoxyl group of tri-n-butyltin methoxide? There were always two additional peaks at 3.479 and 3.465 ppm compared with a large peak at 3.624 ppm. At the first glance, I thought there were some contaminants in the sample. The large peak at 3.624 ppm should be assigned to methyl protons in methoxyl group, the additional two small signals may come from other side products. However, when I checked it in the proton spectra library, they both have the same feature. Anyone have comments?
Many thanks!
Junfeng Xiang
NMR Lab
ICCAS China
The spectrum and the molecular structure are appended in the attached file.
Received on Wed Nov 11 2015 - 03:28:54 MST