1H and 13C NMR studies on the positional isomers of methyl selenalaurate and telluralaurate

Abstract

A report is given of the ¹H and ¹³C NMR spectra of a series of methyl selenalaurates and telluralaurates in which successive methylene groups have been replaced by a selenium or a tellurium atom. The effect on contiguous carbons is a marked upfield shift (shielding) while the protons attached to these carbons are deshielded. The β and γ protons are weakly deshielded.