Diamino-ligated platinum(II) and platinum(IV) phenoxide complexes; syntheses and crystal structures

Abstract

The reaction of the diamino-ligated dimethylplatinum( II ) complex [ Pt( Me)_,( bpy ) I ( bpy = 2,2'-bipyridyl ) with phenol affords the new complex [ Pt( Me 1 ( OPh ) (bpy) I ( ! ). The X-ray crystal structure of square-planar ! is reported: orthorhombic, space ~oup P2_t2t2 ~ ( No. 19), a = 9.1625 (12)

Platinum Model Studies for Palladium-Catalyzed Oxidative Functionalization of C−H Bonds

“…The bis(methoxide) product 6a was readily purified by chromatography on silica gel, and its structure was confirmed by X-ray crystallography (Figure ) . In general, these metrical parameters are comparable to those of other organometallic Pt IV alkoxides, 8e, and deviation from perfect octahedral geometry in this structure is minimal. The mixed methoxide/acetate product 7a proved difficult to separate cleanly from 6a , but the stoichiometry of this complex was readily determined by 1 H NMR integration, which showed a 1:1 ratio of methoxide and acetate ligands.…”

Synthesis and characterization of monomeric siloxo palladium(II) complexes: crystal structure of [Pd(tmeda)(C6F5)(OSiPh3)]

“…The crystal structure of compound 7 shows two independent molecules in the asymmetric unit with the palladium atom in a slightly distorted square planar geometry. The Pd-O bond length (1.986(3) A) is in the typical range of Pd-O bonds reported for phenoxo palladium complexes [17,18] and slightly shorter than that found in …”

A Zwitterionic Transition-Metal Complex: Platinum−closo-Borate Coordination Synthesis, Structure, and DFT Calculations

“…These relatively long distances are a good reflection of the fact that the phenylide and stannaborate ligands exhibit similarly large trans influences. Examples for bipyridine platinum(IV) complexes are as follows: [Pt(bipy)Cl 4 ], Pt−N = 2.038(8), 2.044(9) Å; [Pt(Me) 2 (I)(OPh)(bipy)], Pt−N( trans -Me) = 2.106(6) Å, Pt−N( trans -OPh) = 2.018(6) Å; [Pt(bipy)(CH 2 CH 2 CH 2 )Cl 2 ], Pt−N( trans -alkyl) = 2.20(3) Å; [Pt(bipy)(Me) 2 (SnMe 3 )I], Pt−N( trans -Me) = 2.140(18) Å 2

1 Structure of 5 in the crystal (PLATON representation ellipsoids at the 30% probability level).

3

1 Selected Interatomic Distances (Å) and Bond Angles (deg) for [(bipy‘)Pt(Bz)(Ph)( t -Bu-NC)(SnB 11 H 11 )] (5) Pt−Sn 2.554(1) C14−N3 1.164(10) Pt−C1 2.064(8) Sn−B1 2.309(11) Pt−C7 2.145(8) Sn−B2 2.316(10) Pt−C14 2.063(9) Sn−B3 2.332(9) Pt−N1 2.159(7) Sn−B4 2.286(9) Pt−N2 2.154(6) Sn−B5 2.272(10)Sn−Pt−N2 174.0(2) Sn−Pt−N1 99.3(2) N1−Pt−C1 174.4(3) Sn−Pt−C1 86.2(2) C14−Pt−C7 176.5(3) Sn−Pt−C14 88.1(2) Sn−Pt−C7 89.3(2) Pt−C14−N3 171.2(7) …”