Zadania z chemii IB HL

The compound X shown below occurs naturally in cocoa and coffee and is used as a flavouring agent. (i) State the name of the functional group found in compound X. (ii) Deduce the IUPAC name of X. (iii) Deduce how many signals the $\ce{^1H}$ NMR spectrum of X…

The $\ce{^1H}$ NMR spectrum of an alcohol with molecular formula $\ce{C5H11OH}$ shows four signals with relative areas 6 : 4 : 1 : 1. Which alcohol is it? A. Pentan-1-ol B. Pentan-3-ol C. 2-methylbutan-2-ol D. 2,2-dimethylpropan-1-ol

Which oxygen-containing compound gives this low-resolution $\ce{^1H}$ NMR spectrum? A. Propanone B. Methyl ethanoate C. Propanoic acid D. Propan-2-ol

In the mass spectrum of Y, the molecular ion peak appears at m/z 88. (i) Y contains no multiple carbon–carbon bonds and no rings. Deduce its molecular formula. Use section 7 of the data booklet. Shown below is the high-resolution $\ce{^1H}$ NMR spectrum of Y,…

Which is the low-resolution $\ce{^1H}$ NMR spectrum of methyl methanoate, $\ce{HCOOCH3}$? A. Spectrum A B. Spectrum B C. Spectrum C D. Spectrum D

(i) Draw the structural formula of 2-chloropentane and that of the structural isomer in which the chlorine atom is attached to a tertiary carbon atom. (ii) Only one of the two isomers drawn in (c)(i) is chiral. Draw stereochemical formulas showing its two…

The $\ce{^{1}H}$ NMR spectra of four compounds are described below. Which is the spectrum of propanone, $\ce{CH3COCH3}$? Use section 21 of the data booklet. A. one singlet at 2.2 ppm B. a quartet at 2.4 ppm and a triplet at 1.0 ppm, with relative areas 2 : 3…