Selenium chelates. Preparation and X-ray structure determination of methyl(diethyldiselenocarbamato)(triphosphine)platinum(II), Pt(Se2CNEt2)(CH3)(PPh3)

Chen, H.-W.; Fackler, John P.; Masters, Anthony F.; Pan, Wie-Hin

doi:10.1016/s0020-1693(00)93386-3

Cited by 13 publications

(3 citation statements)

References 9 publications

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“…Angles around the platinum are rather different from 90° because of the small bite angles of the chelate ligands. The Pt−I distances are similar to the observed ones in other Pt(IV) iodo complexes 27 and slightly different from each other, showing the stronger trans influence of the C(sp 3 ) σ-bond . The Pt−C, Pt−P, and Pt−S distances are similar to the corresponding ones in the starting material (complex 3 ).…”

Section: Resultssupporting

confidence: 71%

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New C,P-Cyclometalated Compounds of Platinum(II) and Platinum(IV) Derived from Tri-o-tolylphosphine

et al. 1996

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The reaction between [trans-PtCl2(PhCN)2] (PhCN = benzonitrile) and tri-o-tolylphosphine rendered [Pt{CH2C6H4P(o-tolyl)2-C,P}(μ-Cl)]2 (1), a new C,P-cyclometalated compound of Pt(II). The treatment of 1 with AgClO4 (1: 2) in NCMe gave the mononuclear compound [Pt{CH2C6H4P(o-tolyl)2-C,P}(NCMe)2]ClO4 (2). Solutions probably containing the cation [Pt{CH2C6H4P(o-tolyl)2-C,P}(THF)2]+ (THF = tetrahydrofuran) reacted with sodium dimethyldithiocarbamate (NaS2CNMe2) and potassium ethyl xanthate (KS2COEt) in 1:1 molar ratio yielding the mononuclear complexes [Pt{CH2C6H4P(o-tolyl)2-C,P}(S2CR)] (R: NMe2 (3), OEt (4)). The molecular structure of 3 was determined by X-ray diffraction. The reactions of 3 and 4 with Cl2, Br2 and I2 gave the mononuclear Pt(IV) complexes [Pt{CH2C6H4P(o-tolyl)2-C,P}(S2CR)X2] (X: Cl, Br, I) (5−10). In each reaction a single product can be detected spectroscopically, indicating that the oxidative addition of halogens (X2) to 3 and 4 proceeds stereoselectively. The molecular structure of compound 7, determined by X-ray diffraction, revealed that the obtained isomer has the OC-6-42 structure with both halogen atoms in cis positions.

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Section: Resultssupporting

confidence: 71%

“…The Pt−S(1) bond length (2.392(2) Å) is slightly longer than the Pt−S(2) one (2.354(1) Å) because of the different trans influence of the P and C donor atoms of the C,P-cyclometalated group …”

Section: Resultsmentioning

confidence: 96%

New C,P-Cyclometalated Compounds of Platinum(II) and Platinum(IV) Derived from Tri-o-tolylphosphine

et al. 1996

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“…The Pt−P, Pt−C, and Pt−O 19a,b,25 bond lengths are similar to those found in other complexes containing the same kinds of ligands. The Pt−O bond lengths [Pt(1)−O(1) = 2.071(7) Å, Pt(1)−O(3) = 2.149(7) Å] show the higher trans influence of C with respect to P. , …”

Section: Resultsmentioning

confidence: 99%

Reactivity of [M(C∧P)(acac-O,O‘)] [M = Pt, Pd; C∧P = CH₂-C₆H₄-P(o-tolyl)₂-κC,P; acac = 2,4-pentanedionato] toward HgX₂ (X = Br, I, CH₃COO, CF₃COO). New Polynuclear Complexes Containing Pt−Hg Bonds. Molecular Structures of [{Pt(C∧P)(acac-O,O‘)- HgBr(μ-Br)}₂(μ-HgBr₂)], an Unprecedented Square-Planar Bromomercurate Complex, and [{Pt(C∧P)(μ-O₂CCH₃)₂Hg(μ³-acac
Ara
¹
,
Falvello
²
,
Forniés
³

et al. 2000
Organometallics
34
2
29
1
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The complexes [M(C∧P)(acac-O,O′)] [M ) Pt ( 1) Pd (1′); C∧P ) CH 2 -C 6 H 4 -P(o-tolyl) 2 -κC,P; acac ) 2,4-pentanedionato] were prepared by the reaction of [M(C∧P)(µ-Cl)] 2 [M ) Pt, Pd] with Tl(acac) and fully characterized. The reactions of [Pt(C∧P)(acac-O,O′)] (1) with equimolar amounts of HgX 2 (X ) I, Br) give the polynuclear complexes [Pt(C∧P)(acac-O,O′)HgI(µ-I)] 2 (2) and [{Pt(C∧P)(acac-O,O′)HgBr(µ-Br)} 2 (µ-HgBr 2 )] ( 3) containing unsupported Pt-to-Hg donor bonds. In the pentanuclear complex 3, the central mercury atom shows an unexpected square-planar environment, unprecedented for halomercurates(II). The complex [Pt(C∧P)-(acac-O,O′)] (1) also reacts with Hg(O 2 CR) 2 (R ) CH 3 , CF 3 ), but in 1:2 molar ratio, to afford the neutral hexanuclear complexes [Pt(C∧P)(µ-O 2 CR) 2 Hg(µ 3 -acac 2--κC 3 ,O)Hg(O 2 CR-κO)] 2 [R ) CH 3 (4), CF 3 (5)]. An X-ray study of 4 revealed that these compounds contain very short platinum-to-mercury donor bonds supported by two carboxylate groups, along with an unusual dimercurated acetylacetone moiety. The reactions of [Pd(C∧P)(acac-O,O′)] (1′) with HgX 2 (X ) Br, I, CH 3 COO, CF 3 COO) proceed mainly (X ) Br, CH 3 COO, CF 3 COO) with substitution of the acac-O,O′ ligand by X from the coordination environment of the palladium center to give the binuclear derivatives [Pd(C∧P)(µ-X)] 2 (X ) Br, CH 3 COO, CF 3 COO), hindering the obtention of palladium-mercury compounds by this route.

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2. Diselenocarbamates from Carbon Diselenide

Pan

Fackler

Anderson

et al. 1982

Inorganic Syntheses

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Selenium chelates. Preparation and X-ray structure determination of methyl(diethyldiselenocarbamato)(triphosphine)platinum(II), Pt(Se2CNEt2)(CH3)(PPh3)

Cited by 13 publications

References 9 publications

New C,P-Cyclometalated Compounds of Platinum(II) and Platinum(IV) Derived from Tri-o-tolylphosphine

New C,P-Cyclometalated Compounds of Platinum(II) and Platinum(IV) Derived from Tri-o-tolylphosphine

2. Diselenocarbamates from Carbon Diselenide

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