为什么cis isomer的melting point 比trans的低

问题描述:

为什么cis isomer的melting point 比trans的低
从最基本的bond上面分析
什么是van de Waal's force?

asymmetric cis isomer 的 dipole moment is smaller than its trans isomer's.In solid state the trans isomer has stronger van de Waal's force between its molecules.