SOLVENT EFFECTS ON SI-CL STRETCHING VIBRATIONS OF TRIMETHYLCHLOROSILANE METHYLTRICHLOROSILANE AND DIPHENYLDICHLOROSILANE

IR technique has been used to study the solute-solvent interaction of trimethylchlorosilane, methyltrichlorosilane and diphenyldichlorosilan e in a number of solvents. The relative shifts in frequency, Delta v/v , in different solvents have been correlated with refractive indices a nd dielectric constants of solvents. Generally, SI-CI stretching vibra tional frequency shifts towards lower wave numbers than those observed in the gas phase. Buckingham's modification of Bauer Magat formula wa s used to interpret the solute-solvent interactions. The calibration l ines between Delta v/v vs epsilon-1/2 epsilon+1 Were drawn. Results ob tained from these calibration lines are also discussed in terms of sol ute-solvent interaction.