The NMR Study on Trans-Trans-Dibenzylideneacetone Complex of palladium(II)

Abstract

The complex [(L-L)Pd(dba)], wherse (L-L) is 1,2-bis(di-tert-butylphosphinomethyl)
benzene and dba is (trans-trans-dibenzylideneacetone), has
been prepared and characterized by variable temperature multinuclear
NMR spectroscopy. The environment around palladium seems to be essentially
trigonal planar, with small dihedral angles between P₂Pd- and
PdC₂ planes. Tertiary phosphine ligands (PR₃) play an extremely important
role in the coordination chemistry of the late transition elements. They are
important because they constitute one of the few series of ligands in which
electronic and steric properties can be altered in a systematic and predictable
way over a wide range by varying R. They also stabilize an exceptionally
wide variety of metal species of interest to the organometallic
chemist as their phosphine complexes (R₃P)_nM-L.