IB Chemistry SL 3.2.1 Organic Formula Representations

Practise recognising empirical, molecular, full, condensed, stereochemical and skeletal formulas and converting between them. Read implicit carbon and hydrogen atoms correctly,…

Exam points

identify the exact formula representation shown rather than answering only 'structural'
expand or condense a formula while preserving bonds, branches and functional groups
read vertices, line ends and rings in a skeletal formula to count atoms or cycles

[Maximum number: 1]

Strychnine, $\mathrm{C}_{21} \mathrm{H}_{22} \mathrm{~N}_{2} \mathrm{O}_{2}\left(M_{\mathrm{r}}=334.4\right)$ , is a white crystalline solid obtained from plants.

The formula of strychnine is:

Figure for Question 3.2.1—Organic formulas question 1 — IB Chemistry SL

State the type of structural formula shown.

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3.2.1—Organic formulas question 1