Raman bands are clearly evidenced in this region, while for (CnH2n+1NH3)2PbBr4 three Raman bands are recorded. Regardless the length of the organic chain, for both systems, at higher energies the Raman features appear less intense and broadened. All the observed Raman bands should be the convolution of several Raman modes which can be resolved lowering the temperature. However, it is commonly accepted that for the modes below 80 cm -1 the main contributions comes from the Pb-Br bond bending and twisting, and from Br-Pb-Br scissoring