1,3-bis(4-pyndyl)propane complexes of divalent metal halides and pseudohalides

Summary

Coordination compounds formed by the interaction of 1,3-bis(4-pyridyl)propane (DPP) with some divalent metal halides and pseudohalides have been prepared and characterized by magnetic susceptibilities, electronic and i.r. spectral measurements down to 200 cm⁻¹ in the solid state. The i.r. spectra indicate that DPP acts mostly as a bidentate bridging ligand in these complexes. Moreover, the two pyridyl rings which are nonplanar in uncoordinated DPP become coplanar upon coordination. Tentative stereo chemistries of the complexes have been suggested in the solid state. The ligand field parameters Dq, B, β, λ and ν₂/ν₁ have been calculated for the cobalt(II) and nickel(II) complexes and are consistent with the proposed stereo chemistries.