Spectroscopic evidence of metal–metal interaction in tetrakis(dithiophenylacetato)dinickel(II)

Abstract

The crystal polarised spectrum of the title compound has been recorded. The spectrum contains more bands than those predicted for a mononuclear diamagnetic square planar Ni^II complex, a series of five bands with different polarisation characteristics being observed between 13 and 18 kK(1 kK= 1000 cm^–1). It is suggested that the spectra are indicative of substantial overlap of the d orbitals between the two nickel(II) atoms in the molecule, and an assignment of the spectrum in D₄ symmetry (for the dimeric [Ni₂S₈] chromophore) put forward.