A phosphorus-31 magnetic resonance study of tertiary phosphine palladium(II) compounds

Grim, Samuel O.; Keiter, Richard L.

doi:10.1016/s0020-1693(00)93239-0

Cited by 86 publications

(26 citation statements)

References 9 publications

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“…For the chloro complex 2, the reaction yields exclusively the cisisomer judged from the 31 3 compare well with those of PtX 2 L 2 having neutral or ion-paired phosphine ligands [35].…”

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 60%

“…In the 31 the cis-and trans-isomers can be unambiguously assigned from the respective 1 J(PteP) value due to considerable variation of the transinfluence of the ligands, halide and phosphine [34]. The observed 1 J(PteP cis ) value is significantly larger than that of the 1 J(PteP trans ).…”

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 90%

“…It is well documented that in square planar d 8 -Pd(II) complexes, a type of PdL 2 X 2 , the 31 P chemical shift (d) of the trans-isomer generally appears upfield from that of the cis-isomer [30,31]. In the 31 the cis-and trans-isomers can be unambiguously assigned from the respective 1 J(PteP) value due to considerable variation of the transinfluence of the ligands, halide and phosphine [34].…”

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 99%

See 2 more Smart Citations

Water-soluble complexes MX2L2 (M = Pd, Pt; L = PPh2(C6H4-p-SO3K)): Synthesis, stereoisomerism, and catalytic activities for aromatic cyanation in n-heptane/water biphasic solution

Shim

Lee

Park

2012

Journal of Organometallic Chemistry

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“…For the chloro complex 2, the reaction yields exclusively the cisisomer judged from the 31 3 compare well with those of PtX 2 L 2 having neutral or ion-paired phosphine ligands [35].…”

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 60%

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 90%

Section: Stereoisomerism Of MX 2 Lmentioning

confidence: 99%

See 1 more Smart Citation

Water-soluble complexes MX2L2 (M = Pd, Pt; L = PPh2(C6H4-p-SO3K)): Synthesis, stereoisomerism, and catalytic activities for aromatic cyanation in n-heptane/water biphasic solution

Shim

Lee

Park

2012

Journal of Organometallic Chemistry

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“…All solvents were dried and distilled by conventional methods prior to use. The reagent trans-[PdCl 2 (PMe 2 Ph) 2 ] was obtained using PdCl 2 (SMe 2 ) 2 instead of PdCl 2 [16]; IPh(C^CR)(OTf) (R ¼ Bu t , SiMe 3 ) [17], IPh 2 (OTf) [18], and IPhCl 2 [19] were prepared as reported. NMR spectra were recorded on a Varian Mercury Plus 300 MHz and Varian 400 Unity Inova spectrometers.…”

Section: Methodsmentioning

confidence: 99%

Carbon–carbon and carbon–chlorine bond formation on reaction of iodine(III) reagents with the bis(alkynyl)palladium(II) motif, and structural chemistry of trans-Pd(C C-o-Tol)2(PMe2Ph)2] and trans-[PdCl(C C-o-Tol)(PMe2Ph)2]

Sharma

Canty

Gardiner

et al. 2011

Journal of Organometallic Chemistry

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“…The use of solid-state NMR techniques in addition to complementary vibrational measurements can be helpful in providing information about the structure and interactions between molecules and substrates. [11][12][13] Work by Fyfe and co-workers 14 describes the use of 31 P MAS NMR spectroscopy for the study of phosphine complexes immobilized onto silica gel, in order to overcome the disadvantages in the characterization of such systems.…”

Section: Introductionmentioning

confidence: 99%

Properties of [Pd2X2(dppm)2] (X = Cl, SnCl3, dppm = Bis(diphenylphosphino)methane) complexes on porous vycor glass

Gimenez¹,

Alves²

2004

J. Braz. Chem. Soc.

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Neste trabalho o vidro poroso Vycor foi utilizado como matriz para a imobilização de complexos contendo ligação metal-metal [Pd 2 Cl 2 (dppm) 2 ], [Pd 2 (SnCl 3 )Cl(dppm) 2 ] e [Pd 2 (SnCl 3 ) 2 (dppm) 2 ] A elevada reatividade das ligações metal-metal em reações de inserção de moléculas como CO e SO 2 é preservada no meio poroso, sendo reversível sob vácuo. Os espectros de RMN MAS 31 P, refletância difusa no infravermelho e Raman indicaram que há uma gama de interações possíveis entre o vidro e as moléculas, como resultado da disponibilidade de diferentes grupamentos presentes nas moléculas, bem como de uma topologia porosa irregular. O caráter estático das moléculas no ambiente restrito impede movimentos do anel Pd 2 P 4 C 2 entre as conformações barco e cadeira, de modo que as moléculas confinadas podem ter diferentes conformações.Porous Vycor glass (PVG) is used as a matrix for immobilization of complexes containing metal-metal bonds: [Pd 2 Cl 2 (dppm) 2 ], [Pd 2 (SnCl 3 )Cl(dppm) 2 ] and [Pd 2 (SnCl 3 ) 2 (dppm) 2 ]. The high reactivity of the metal-metal bonds in insertion reactions with small molecules such as CO and SO 2 is preserved in the pore medium, and is reversible under vacuum.31 P MAS-NMR and Raman spectra indicate that there is a range of interactions between the glass and the adsorbed molecules as a result of the availability of different groups in the molecules and of the irregular pore topology as well. The static character of the molecules in the restrictive pore environment precludes motions such as flipping of the ring Pd 2 P 4 C 2 between boat and chair conformations and rotation of the phenyl rings, and the molecules may present a range of conformations.Keywords: palladium complexes, Vycor, immobilization, 31 P NMR, Raman, metal-metal bond IntroductionMany adsorption studies related to organometallic compounds and transition metal complexes on porous glasses have been performed with the purpose of applications such as catalysis 1,2 and formation of nanoparticles by thermal decomposition or photolysis of the molecular species. [3][4][5][6][7] In this area, a number of papers describe the immobilization of carbonyl complexes of iron 3-7 and ruthenium 8-10 onto porous glasses, since these complexes are good precursors to metallic or oxide particles via thermal and photochemical decomposition.Immobilization studies of transition metal phosphine complexes were limited for many years by the lack of suitable characterization techniques. Infrared spectroscopy is very useful in the characterization of carbonyl complexes embedded in porous glasses, giving however spectra dominated by the silica matrix bands in the case of phosphine complexes. The use of solid-state NMR techniques in addition to complementary vibrational measurements can be helpful in providing information about the structure and interactions between molecules and substrates. 15 These compounds take part in different types of reactions, such as additions, substitutions and insertions, owing to the presence of a single metal-metal b...

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A phosphorus-31 magnetic resonance study of tertiary phosphine palladium(II) compounds

Cited by 86 publications

References 9 publications

Water-soluble complexes MX2L2 (M = Pd, Pt; L = PPh2(C6H4-p-SO3K)): Synthesis, stereoisomerism, and catalytic activities for aromatic cyanation in n-heptane/water biphasic solution

Water-soluble complexes MX2L2 (M = Pd, Pt; L = PPh2(C6H4-p-SO3K)): Synthesis, stereoisomerism, and catalytic activities for aromatic cyanation in n-heptane/water biphasic solution

Carbon–carbon and carbon–chlorine bond formation on reaction of iodine(III) reagents with the bis(alkynyl)palladium(II) motif, and structural chemistry of trans-Pd(C C-o-Tol)2(PMe2Ph)2] and trans-[PdCl(C C-o-Tol)(PMe2Ph)2]

Properties of [Pd2X2(dppm)2] (X = Cl, SnCl3, dppm = Bis(diphenylphosphino)methane) complexes on porous vycor glass

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