Usually branching (or decrease in surface area) leads to increased volatility. But in case of alcohols, my book states that:
The higher alcohols (butanols to decanols) are somewhat viscous, and some of the highly branched isomers are solid at room temperature.
Here the decerease in surface area did not increase the volatility; on the contrary, volatility has considerably reduced.
What is the reason of this anomaly? Or is this even an anomaly?