Chemistry - STEREO ISOMERISM Question with Solution | TestHub

3,4-Dimethylhexane is $\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2-\mathrm{CH}(\mathrm{C}{\mathrm{H}}_3)-\mathrm{CH}(\mathrm{C}{\mathrm{H}}_3)-\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_3$, viewed along the C-3/C-4 bond. The front carbon carries $\mathrm{C}{\mathrm{H}}_3$, ${\mathrm{C}}_2{\mathrm{H}}_5$ and H, so A = $-{\mathrm{C}}_2{\mathrm{H}}_5$; the back carbon carries ${\mathrm{C}}_2{\mathrm{H}}_5$, $\mathrm{C}{\mathrm{H}}_3$ and H, so B = $-\mathrm{C}{\mathrm{H}}_3$.