200574-35-2

Downstream Products

• 201802-52-0 Pt(CH₃)2(((CH₃)2C₆H₃NCH)2)^(1-) 
• 400609-13-4 (2,6-Me₂PhDAB(H))PtCl₂Me₂ 
• 676364-14-0 [1,2-bis(2,6-dimethylphenylimino)ethane](heptafluoropropyl)methylplatinum(II) 
• 945924-40-3 (CHNC₆H₃(CH₃)2)2Pt(CH₃)3(CH₃CN)⁽¹⁺⁾*CF₃SO₃^(1-)=(CHNC₆H₃(CH₃)2)2Pt(CH₃)3(CH₃CN)CF₃SO₃ 
• 676364-18-4 [1,2-bis(2,6-dimethylphenylimino)ethane](heptafluoropropyl)iodoplatinum(II) 
• 676364-19-5 [1,2-bis(2,6-dimethylphenylimino)ethane](1H-tetrafluoroethyl)iodoplatinum(II) 
• 400609-21-4 (2,6-Me₂PhDAB(H))PtI₂Me₂ 

Relevant academic research and scientific papers

Oxidatively induced reactions of a diimine platinum(IV) tetramethyl complex

The oxidation of the Pt(IV) tetramethyl complex [Ar{single bond}N{double bond, long}CH{single bond}CH{double bond, long}N{single bond}Ar]PtMe4 (Ar = 2,6-Me2C6H3) has been investigated in acetonitrile and dichloromethane. Cyclic voltammetry demonstrates that the irreversible oxidation of [Ar{single bond}N{double bond, long}CH{single bond}CH{double bond, long}N{single bond}Ar]PtMe4 occurs at a slightly less positive oxidation potential than the irreversible oxidation of the analogous Pt(II) species [Ar{single bond}N{double bond, long}CH{single bond}CH{double bond, long}N{single bond}Ar]PtMe2. The product distribution arising from the oxidation depends strongly on the reaction conditions and includes cationic Pt(IV) species (acetonitrile, dichloromethane solvents) and Pt(II) species (dichloromethane only). Evidence is presented that suggests that homolytic cleavage of a weakened Pt{single bond}C bond in [ArN {double bond, long} CH {single bond} CH {double bond, long} NAr] PtMe4{radical dot} + is involved in the oxidatively induced reactions.

Preparation of dimethyl and chloro/methyl complexes of platinum(II) supported by α-Diimine ligands: Trends in the ease of oxidation to platinum(IV)

α-Diimine ligands react with the platinum(II) alkyl complexes [(Me2S)PtMe2]2 and (Me2S)2PtClMe to form (RDABR′)PtMe2 and (RDABR′)PtClMe (RDABR′=RN=CR′-CR′=NR; R=2,6-Me2Ph, 2,6-(CHMe2)2Ph, 3,5-Me2Ph, 3,5-(CF3)2Ph, C6H11; R′ =Me, H). The oxidation of these complexes with Cl2, I2, N-chlorosuccinimide, [PtC16]2- and (TMEDA)PtMe2I2 has been investigated. Attempts to determine the oxidation potentials of the Pt11 complexes electrochemically yielded only irreversible one-electron oxidations. However, a qualitative ordering of increasing difficulty of oxidation has been determined for the series (RDABR′)PtMe2 R′)PtClMe R′)PtCl2 ? (RDABR′)PtMe(solvent)]+. The oxidation proceeds via a two-electron inner-sphere electron transfer from a bridged binuclear intermediate. The oxidation of (RDABR′)PtMe2 by (TMEDA)PtMe2I2 exhibits characteristic third-order kinetics, first-order each in [Pt11], [PtIV] and [I-]. Oxidation by a one-electron process in MeCN solution results in a rapid subsequent disproportionation to Pt11Me and PtIVMe3 cations with MeCN occupying the fourth or sixth coordination sites. Single-crystal X-ray structure determinations for [(2,6-Me2PhDABMe)PtMe3(MeCN)]+[PtCl 6]0.5(MeCN) and [(CyDABH)PtMe3(MeCN)]+[PtCl6] 0.5(MeCN) are reported.

Reactions of new organoplatinum(II) and -(IV) complexes of 1,4-diaza-1,3-butadienes with light and electrons. Emission vs photochemistry and the electronic structures of ground, reduced, oxidized, and low-lying charge-transfer excited states

Complexes between the 1,4-disubstituted 1,4-diaza-1,3-butadiene chelate ligands RN=CHCH=NR (R-DAB; R = alkyl, aryl) and the organoplatinum fragments PtMe2, PtMe4, and PtMeS2 (Mes = mesityl) were prepared and characterized with respect to their electronic structures. All compounds are distinguished by low-energy charge-transfer transitions to low-lying π* orbitale of the R-DAB ligands, either from metal d orbitals (PtII) or from metal-carbon σ bond combinations (PtIV). These spectral assignments are supported by DFT calculations on model complexes between HN=CHCH=NH and PtMe2 or PtMe4. The calculations also reproduce the structural results for the complex between CyN=CHCH=NCy and PtMe4, which exhibits significantly longer Pt-C bonds to the axial methyl groups. The distinct solvatochromism of the long-wavelength transitions is described, as are the UV/vis spectroelectrochemical results for reversible reduction to PtIV(R-DAB?-) or PtII(R-DAB?-) species (no evidence for a PtI state). In contrast, the oxidation is electrochemically irreversible except for the dimesitylplatinum compounds. The electrochemical potentials of corresponding PtMe2 and PtMe4 compounds are very similar, demonstrating that the binding of two additional methyl carbanions compensates for the effect of the higher metal oxidation state. While the organoplatinum(II) species are emissive, the tetramethylplatinum(IV) complexes are photoreactive and undergo metal-to-ligand methyl transfer reactions - in agreement with the structurally confirmed weaker bonding to the axial methyl groups.