Certain vegetable oils include ‘trans fats’, which are linked with unwanted rises in the level of cholesterol in the blood. In these oils, the word ‘trans’ refers, in the standard sense, to the positioning of groups across a $\text{C}=\text{C}$ double bond. In the diagrams below, $R_1$ and $R_2$ are different unbranched hydrocarbon chains. Which diagram correctly represents an optically active ‘trans fat’?
Chemistry 9701 · AS & A Level · Chemical bonding