In this research, (3-alkyl benzimidazalium)-TCNQ complexes were synthesized to obtain the necessary components for Langmuir-Blodgett Technique. (3- Alkyl benzimidazolium)-TCNQ complexes were prepared by the reaction of LiTCNQ with 3-alkyl benzimidazolium bromides and the products were confirmed by elemental analysis. FT-IR, UV-Visible spectroscopies. FT-IR spectra of (3-alkyl benzimidazolium) TCNQ(1:2) complexes were characterized by a broad band with a maximum at about $2900cm^{-1}$ appears and were ascribed to electronic rather than vibrational absorption.