Strange results in the undergraduate organic laboratory have led to the admission by a teaching assistant, Thumbs Throckmorton, that he has accidentally mixed some terf-butyl bromide with the methyl iodide. The NMR spectrum of this mixture indeed contains two single resonances at δ 2.2 and δ 1.8 with relative integrals of 5:1.
Which would be more easily detected by NMR: 1 mole percent CH3I impurity in (CH3)3C-Br. or 1 mole percent (CH3)3C-Br impurity in CH3I? Explain.