Weblink 12.5 View and rotate the molecules shown in Fig. 12.27

In 1,3-dichloroallene the end CHCl groups cannot rotate indendently of one another so the molecule is chiral.

In the substituted biphenyl the large Br and Cl atoms prevent rotation about the central C–C bond, so this molecule is also chiral.

• Click and drag to rotate the structure; shift_click and drag to zoom
• Select the size of the atoms with the radio buttons.
• Use the drop-down menu to select which molecule to view