Abstract The preparation of eleven terms of the homologous series of the 2-methyl-1- alkenes (2-methyl-α-alkenes) is described. The purity of the preparations obtained was determined by measuring the melting curves. The densities and refractive indices of the synthesized compounds at 20 C and 25 C were determined; the measurements of the refractive indices were carried out at nine wave-lengths. From the values of the densities ...