MATRIX-ISOLATION AND THIN-FILM SPECTROSCOPIC STUDY OF THE INTERACTIONOF DIMETHYLZINC WITH GROUP-V AND GROUP-VI ALKYLS

Matrix isolation and cryogenic thin film approaches have been employed for the synthesis, isolation, and characterization of 1:1 and 1:2 com plexes of (CH3)(2)Zn with group V and VI alkyls and acetone. A high yi eld of complex was formed for each system, and the ratio of 1:1 to 1:2 adduct could be altered by changing concentration and deposition cond itions. All of the complexes were characterized by a shifting of sensi tive vibrational modes of the (CH3)(2)Zn subunit, along with perturbat ion to certain vibrational modes of the base. The ZnC2 anztisymmetric stretching mode was the most sensitive to complexation, and the magnit ude of the shift of this mode was taken as a qualitative indication of the strength of interaction in the complex. The relative shifts also correlated well with the photon affinities of the several bases in the study.