Homoleptic Cu–phosphorus and Cu–ethene complexes

Santiso‐Quiñones, Gustavo; Reisinger, Andreas; Slattery, John M.; Krossing, Ingo

doi:10.1039/b710899k

Cited by 99 publications

(98 citation statements)

References 28 publications

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“…À , no significant bond lengthening is observed, 12,26 and most increases in bond length are on the order of magnitude of the errors inherent to X-ray crystallography. This contradiction has been explained by applying the concept of Rydberg orbitals.…”

Section: Santiso-quinones Et Al and Dias Et Al Synthesized [Cu(c 2 mentioning

confidence: 89%

“…12,26 On the other hand, Dai and Warren formed a complex of CuBr-SMe 2 with thallium b-diketiminate and ethylene, and the ethylene peak was observed far upfield at d ¼ 2.91 ppm. 19 Most Cu(I)-ethylene complexes span these two extremes of 1 H NMR chemical shifts.…”

Section: Santiso-quinones Et Al and Dias Et Al Synthesized [Cu(c 2 mentioning

confidence: 96%

“…In contrast, Cl À most likely remains coordinated with the Cu(I) ion, donating charge through one of its lone pairs. 23,26 The Cl À ion can also bridge multiple Cu(I) ions, although this is generally not seen with aniline or ethylene as ligands. 23,28 Thus, the ethylene and Cl À would each occupy one coordination site, whereas aniline would most likely fill the others.…”

Section: Ligand Complexationmentioning

confidence: 97%

“…25 Copper compounds with three ethylene adducts have also been synthesized through the use of weak coordinating anions. 12,26 Both form a trigonal planar structure, as shown below in Figure 7.…”

Section: Ligand Complexationmentioning

confidence: 98%

“…8,11 However, this shift can vary significantly depending on the type of auxiliary ligand used. Sunderrajan 24,26 Although the reason for these differences are not well explained in literature, the IR shift serves as a useful identification for Cu(I)-ethylene coordination.…”

Section: Effects Of Complexation and Spectroscopic Analysismentioning

confidence: 99%

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A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

Chen¹,

Eldridge²,

Rosen³

et al. 2011

AIChE Journal

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The current cryogenic distillation technology used for olefin–paraffin separation incurs extensive capital and operating costs. An alternative olefin–paraffin separation process, based on reactive absorption, could yield significant cost reductions. The research efforts described herein explored the structural characteristics of an NMP‐CuCl‐aniline absorption solution with ethylene to aid future development of olefin–paraffin separation systems. Solution IR and 1H NMR spectroscopy suggested weak and labile Cu(I)‐ethylene and Cu(I)‐aniline coordination, which point to the coexistence of multiple structures in solution. Experiments also revealed solvent‐dependent and temperature‐dependent coordination. The agreement of the collected spectral data with literature implied single ethylene coordination, whereas the Cl− ion likely remained coordinated with Cu(I). Solvent interference prohibited detailed investigation of IR spectra, but 1H NMR spectroscopy showed more promise as an analytical technique for the NMP‐CuCl‐aniline‐ethylene system. Finally, a tradeoff appears to exist between ethylene capacity and complex stability, and thus, an optimal ligand must be found that balances these two competing needs. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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Section: Santiso-quinones Et Al and Dias Et Al Synthesized [Cu(c 2 mentioning

confidence: 89%

Section: Santiso-quinones Et Al and Dias Et Al Synthesized [Cu(c 2 mentioning

confidence: 96%

Section: Ligand Complexationmentioning

confidence: 97%

Section: Ligand Complexationmentioning

confidence: 98%

Section: Effects Of Complexation and Spectroscopic Analysismentioning

confidence: 99%

See 3 more Smart Citations

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

Chen¹,

Eldridge²,

Rosen³

et al. 2011

AIChE Journal

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References

2018

Vibrational Spectra of Organometallics

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Cyclododecasulfur as a Ligand: From Gas‐Phase Experiments to the Crystal Structures of [Cu(S₁₂)(S₈)]⁺ and [Cu(S₁₂)(CH₂Cl₂)]⁺

et al. 2009

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Sulfur is the element with the largest number of modifications and usually exists as S n ring molecules; those with n = 6-14, 18, and 20 [1,2] have been structurally characterized. Thermodynamically, the two most stable rings are D 4d S 8 and D 3d S 12 . [1a, 2] In contrast to the rich structural chemistry of elemental sulfur, the coordination chemistry of neutral sulfur molecules is underdeveloped and, to our knowledge, limited to [Ag (S 8 and [Re 2 (m-X) 2 (CO) 6 (S 8 )] (X = Br, I). [4b] The coordination chemistry of the other chalcogens, Se and Te, is also restricted [5a] to few examples including [(OSO)AgSe 6 Ag-(OSO)] 2+ and [(Se 6 Ag + ) n ]. [5b] In agreement with this, the sulfur ring molecules usually undergo redox degradation when treated with transition metal cations, leading to simpler metal (poly-)sulfide complexes, rather than forming coordination compounds. [6] However, Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) gas phase investigations of transition metal monocations M + with sulfur vapor (mainly S 8 ) detected strong signals for [MS n ] + complexes (n = 2-4, 6-8, 10, 12, and 14), suggesting that such coordination complexes can exist. [7] However, it remains unclear, if the observed compounds are true coordination compounds of the S n molecule or if M + oxidatively added to the S À S bond, forming a (n + 1)-heterocycle. Recent quantum chemical studies on [MS n ] + complexes (M = Li, Ca, V, Cu) suggested complexation of the metal cation to the ring structures. [8] Another open question from the pioneering mass spectrometric study [7] is whether the [MS n ] + complexes contain a single S n molecule or two (or more) smaller molecules S x and S y (x + y = n). For Ag + and S 8 , the mass spectrum showed two main signals, for [AgS 8 ] + and [AgS 16 ] + , both of which were also fully characterized as [Ag(h 4 -S 8 )] + and [Ag(h 4 -S 8 ) 2 ] + incorporated in the corresponding salts in the solid state, [3] using large and weakly coordinating anions

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Homoleptic Cu–phosphorus and Cu–ethene complexes

Abstract: Stable salts of the first homoleptic Cu-phosphorus and Cu-ethene complexes, [Cu(eta2-P4)2]+ and [Cu(eta2-C2H4)3]+, isolated by the aid of the weakly coordinating anion (WCA) [Al(OC(CF3)3)4]-, were obtained.

Cited by 99 publications

References 28 publications

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

References

Cyclododecasulfur as a Ligand: From Gas‐Phase Experiments to the Crystal Structures of [Cu(S₁₂)(S₈)]⁺ and [Cu(S₁₂)(CH₂Cl₂)]⁺

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Homoleptic Cu–phosphorus and Cu–ethene complexes

Abstract: Stable salts of the first homoleptic Cu-phosphorus and Cu-ethene complexes, [Cu(eta2-P4)2]+ and [Cu(eta2-C2H4)3]+, isolated by the aid of the weakly coordinating anion (WCA) [Al(OC(CF3)3)4]-, were obtained.

Cited by 99 publications

References 28 publications

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

A study of Cu(I)‐ethylene complexation for olefin–paraffin separation

References

Cyclododecasulfur as a Ligand: From Gas‐Phase Experiments to the Crystal Structures of [Cu(S12)(S8)]+ and [Cu(S12)(CH2Cl2)]+

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Cyclododecasulfur as a Ligand: From Gas‐Phase Experiments to the Crystal Structures of [Cu(S₁₂)(S₈)]⁺ and [Cu(S₁₂)(CH₂Cl₂)]⁺