Insertion of tin(II) bromide into Pt–X (X=Cl, Br) bond of dimethylplatinum(IV) complexes: A novel polymorphic form of [PtBr2(bpy)]

Oxidative addition of some mono, di or tetra haloalkanes to organoplatinum(II) complexes

“…In each case, an excess of a,u-dibromoalkane was used and the disappearance of MLCT band at l ¼ 480 nm (19), l ¼ 475 nm (20) or l ¼ 473 nm (2) was used to monitor the reactions. The complex [PtMe 2 Br{(CH 2 ) 4 Br}(bpy)] has already been prepared by the reaction of [PtMe 2 (bpy)] with 1,4-dibromobutane [7]. For comparison, the oxidative addition reaction of 1,4-dibromobutane to [PtMe 2 (bpy)] was also studied and the activation parameters were determined in each case ( Table 1).…”

“…NN ¼ bpy, or phen) (seeTable 3)[7,10]. It therefore seems that replacement of the hydrogen by CH 3 group has a considerable deshielding effect on the chemical shift of the PtCH 2 CH 2 group.The synthesis of complex [PtMe 2 Br{(CH 2 ) 2 CHBrCH 3 }(bpy)] (23) was carried out by a similar method to that described for 21e22, by the reaction of [PtMe 2 (bpy)] (2) with 1,3-dibromobutane in acetone (Eq.…”

Easy oxidative addition of the carbon–halogen bond by dimethylplatinum(II) complexes containing a related series of diimine ligands: Synthesis, spectral characterization and crystal structure

“…The reaction of chlorinated solvents such as dichloromethane and chloroform and carbon tetrachloride with the dimethylplatinum(II) compounds yields the corresponding chloromethyl, dichloromethyl and trichloromethyl derivatives of dimethylplatinum(IV) compounds as a mixture of the cis and trans isomers by the oxidative addition of C-Cl bond [23][24][25].…”

Unexpected formation of dihaloplatinum(II) and platinum(IV) complexes in the reaction of [PtMe2(bu2bpy)] with 1,2-dibromotetrachloroethane: Crystal structure of trans-[PtMe2BrCl(bu2bpy)]

“…The Pt(IV) atom in the disordered crystal structure, is octahedrally coordinated (PtC2ClBrN2) [17]. The contraction of N1-Pt-N1#1 at 75.75°from the ideal 90°is typical for the other chelating bipyridines [2,7]. The Pt-C distances are exactly equal (2.063 Å) as well as Pt-N distances [18], l = 7.93 mm À1 , T min = 0.14, T max = 0.57.…”

“…Interestingly, the reaction of [PtMe 2 (phen)] with 1,2-dibromoethane results in the formation of mononuclear complex trans-[PtI 2 Me 2 (phen)], binuclear complex [Pt 2 I 2 Me 4 {l-(CH 2 ) 2 }(phen) 2 ] and ethylene [6]. Also, the reaction of platinum(II) complex [PtMe 2 (bpy)] with X(CH 2 ) n X (n = 1, X = Cl; n = 4, X = Br) results in the formation of dimethylplatinum(IV) complexes [PtMe 2 X(CH 2 X)(bpy)] [7]. The reaction of [PtMe 2 (phen)] with CH 2 I 2 yields a mixture of cis and trans-[PtMe 2 I(CH 2 I)(phen)] and trans-[PtMe 2 I 2 (phen)] while it reacts with CH 2 ClI to afford a mixture of cis and trans-[PtMe 2 I 2 (phen)], cis and trans-[PtMe 2 I(CH 2 Cl)(phen)] and small amounts of cis and trans-[PtMe 2 Cl(CH 2 Cl)(phen)] via a free radical mechanism [8,9].…”