(Biphenyl-2,2′-di­yl)di-tert-butyl­phos­phonium trifluoro­methane­sulfonate

To aid in the elucidation of catalytic reaction mechanism of palladacycles, we found that reaction of trifluoro­methane­sulfonic acid with a phosphapalladacycle resulted in elimination of the palladium and formation of the title phospholium salt, C₂₀H₂₆P⁺·CF₃SO₃⁻. Selected geometrical parameters include P—biphenyl (av.) = 1.801 (3) Å and P—t-Bu (av.) = 1.858 (3) Å, and significant distortion of the tetra­hedral P-atom environment with biphen­yl—P—biphenyl = 93.93 (13)° and t-Bu—P—t-Bu = 118.82 (14)°. In the crystal, weak C—H...O inter­actions lead to channels along the c axis that are occupied by CF₃SO₃⁻ anions.

Di-μ-chlorido-bis­{[2-(di-tert-butyl­phosphan­yl)biphenyl-3-yl-κ²C³,P]palladium(II)} dichloro­methane disolvate

The asymmetric unit of the title compound, [Pd₂Cl₂(C₂₀H₂₆P)₂]·2CH₂Cl₂, contains one half-mol­ecule of the palladium complex and a dichloro­methane solvent mol­ecule. In the complex, two Pd^II atoms are bridged by two Cl atoms, with the other two coordination sites occupied by a C atom of the biphenyl system and a P atom, resulting in a distorted square-planar coordination geometry of the Pd^II atom and a cyclo­metallated four-membered ring. The Pd₂Cl₂ unit is located about an inversion center. The planes of the rings of the biphenyl system make a dihedral angle of 66.36 (11)°.