The infrared spectra (650–70 cm.–1) of alkyl tin halides and their adducts with 2,2′-bipyridyl and 1,10-phenanthroline

Abstract

The infrared spectra (650–70 cm.^–1) of a series of alkyl tin halides R_nSnX_4–n(R = Me, Et, or Buⁿ; X = Cl, Br, or I) have been recorded in cyclohexane solution, and assignments for the various fundamental modes given. The infrared spectra of 41 adducts of 2,2′-bipyridyl and 1,10-phenanthroline with the parent halides have also been recorded over the same frequency range, and assignments for the various metal–ligand fundamentals are given where possible by comparison with those of the SnX₆^2– ions. Twelve of these complexes have been synthesised for the first time. The effective nuclear charge of the tin atom is believed to be an important factor determining the frequency of tin–ligand stretching vibrations.