SYNTHESIS AND STRUCTURE OF A BIPHENANTHROL-PALLADIUM COMPLEX DISPLAYING AN UNUSUAL BONDING MODE

The dipotassium salt of 10,10’-dihydroxy-9,9’-biphenanthryl reacts with [Pd(CH3CN)4]2+ to give a complex in which the ligand is bound to palladium by an oxygen atom and the 9’-position carbon atom. The properties and X-ray structure of this unusual compound are described. Crystal data for C32H22N2O2Pd; monoclinic, P21/c, a = 9.022 (1) Å, b = 18.054 (3) Å, c = 15.778 (2) Å, β = 104.25 (1)°, V = 2490.9 (9) Å8, Z = 4, R(F) = 4.77%. Reasons are suggested for this binding, which may be general for these types of ligands bound to group 8 metals. © 1990, American Chemical Society. All rights reserved.