Gear effects in polycyclohexyl systems: tetracyclohexylethene

Tetracyclohexylethene in tongue and groove arrangement is prepared and analyzed to study the conformational phenomenon in the polycyclohexyl system. Conformations of two methylene groups at methine carbon are restricted due to the presence of a ring. Crystallographic analysis reveals the deep introduction of syn rings methine hydrogens in the grooves. Higher conformational barrier is observed due to restricted rotations of cyclohexyl rings.