Diplatinum(III) [Cl2(μ2-amidinate)4] compound derived from air oxidation of mononuclear cis-[PtII(NH3)2(amidine-κ1)2]2+ complex

Bokach, Nadezhda A.; Tyan, Marina R.; Александров, Г. Г.; Haukka, Matti; Kukushkin, Vadim Yu.

doi:10.1016/j.inoche.2009.08.022

Cited by 10 publications

(3 citation statements)

References 22 publications

(26 reference statements)

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“…The Pt⋅⋅⋅Pt distance of about 2.8 Å (below the sum of their van der Waals radii) indicates an interaction between the platinum atoms. As expected, the Pt⋅⋅⋅Pt distance determined for compound 5 is larger than those of previously reported amidinate‐based platinum(III) compounds …”

Section: Methodssupporting

confidence: 76%

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

et al. 2016

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Binuclear C^C* cyclometalated NHC platinum(II) compounds with bridging amidinate ligands were synthesized to evaluate their photophysical properties. Their three-dimensional structures were determined by a combination of 2D NMR experiments, mass spectrometry, DFT calculations, and solid-state structure analysis. The bridging amidinate ligands enforce short distances between the platinum centers of the two cyclometalated structures, which gives rise to extraordinary photophysical properties.

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Section: Methodssupporting

confidence: 76%

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

et al. 2016

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“…The Pt···Pt distance of about 2.8 (below the sum of their van der Waals radii)i ndicates an interaction between the platinum atoms.A se xpected, the Pt···Pt distance determined for compound 5 is larger than those of previously reported amidinate-based platinum(III) compounds. [11] Thei nfluence of the distance between platinum atoms in bimetallic complexes on their photoluminescence is of particular interest. [13] Thompson and co-workers have shown for pyrazolate-bridged platinum(II) complexes that the Pt···Pt distance can be varied by changing the substitution pattern of the pyrazolate ligand and exerts ad irect influence on the photophysical properties.…”

mentioning

confidence: 99%

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

et al. 2016

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Binuclear C^C* cyclometalated NHC platinum(II) compounds with bridging amidinate ligands were synthesized to evaluate their photophysical properties.T heir three-dimensional structures were determined by ac ombination of 2D NMR experiments,m ass spectrometry,D FT calculations,a nd solid-state structure analysis.T he bridging amidinate ligands enforce short distances between the platinum centers of the two cyclometalated structures,w hich gives rise to extraordinary photophysical properties. Angewandte Chemie Communications

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“…Considering the chemical formula t -Fe , the sum of the metal oxidation states of Pt–Fe–Pt is +7, which is probably because the additional surrounding anions present as a result of the higher cationic charge in the trinuclear complex hinder the dimerization. Because Pt(+3) complexes favor axial coordination with anions, − the formal oxidation states are Pt(+2)–Fe(+3)–Pt(+2). Although Fe(+2) was used as the starting material, iron atoms were easily oxidized to Fe(+3) during the reaction to trinuclear complexes, which are similar to cis -[Pt 2 Fe(piam) 4 (NH 3 ) 4 ] 3+ . , In contrast, in t -Mn , t -Co , t -Ni , and t -Cu , the formal oxidation states are Pt(+2)–M(+2)–Pt(+2), which are unchanged from the original compounds during the reaction.…”

Section: Resultsmentioning

confidence: 99%

Dimerization of Paramagnetic Trinuclear Complexes by Coordination Geometry Changes Showing Mixed Valency and Significant Antiferromagnetic Coupling through −Pt···Pt– Bonds

Takamori

Uemura

2022

Inorg. Chem.

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Paramagnetic trinuclear complexes, trans-[Pt 2 M-(piam) 4 (NH 3 ) 4 ](ClO 4 ) x (t-M; piam = pivalamidate, M = Mn, Fe, Co, Ni, and Cu, x = 2 or 3), aligned as Pt−M−Pt were successfully synthesized and characterized. The dihedral angles between the Pt and M coordination planes in t-M are approximately parallel, showing straight metal−metal bonds with distances of approximately 2.6 Å. Except for t-Fe, the trinuclear complexes are dimerized with close contact (approximately 3.9 Å) between the end Pt atoms to form Pt−M−Pt•••Pt−M−Pt alignments with high-spin M(+2) containing five (t-Mn), three (t-Co), two (t-Ni), and one (t-Cu) unpaired electrons localized on M atoms. Several physical measurements and calculations revealed that the dimerized structures were maintained in MeCN, where cyclic voltammograms for t-M exhibited two-step oxidation and reduction attributed to Pt−Mvia mixed-valent states. Magnetic susceptibility measurements for t-M showed antiferromagnetic interaction, t-Mn: J = −0.9 cm −1 , t-Co: J = −3.5 cm −1 , t-Ni: J = −7.3 cm −1 , and t-Cu: J = 0.0 cm −1 , between the two M centers with distances of 9.0 Å through Pt•••Pt bonds.

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Diplatinum(III) [Cl2(μ2-amidinate)4] compound derived from air oxidation of mononuclear cis-[PtII(NH3)2(amidine-κ1)2]2+ complex

Cited by 10 publications

References 22 publications

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

Binuclear C^C* Cyclometalated Platinum(II) NHC Complexes with Bridging Amidinate Ligands

Dimerization of Paramagnetic Trinuclear Complexes by Coordination Geometry Changes Showing Mixed Valency and Significant Antiferromagnetic Coupling through −Pt···Pt– Bonds

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