Compliant fields for molecular interactions I: Lithium cation with carbonyl donors

Thecndo/Force method has been employed in the determination of quadratic potential functions for the complexes of lithium cation with formaldehyde and formamide. The O, Li+ stretching frequency and the COLi+ bending frequencies have been estimated after scaling, the stretching and stretch-stretch elements of the force constant matrix. The transferability of the donor potential function to the complex has been verified.