Tertiary arsines: a new synthesis route and an NMR study

Srivastava, D. K.; Krannich, L. K.; Watkins, Charles L.

doi:10.1021/ic00343a043

Cited by 33 publications

(6 citation statements)

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“…Tris(2,4,6-triisopropylphenyl)phosphine (2) can be oxidized with broader range of oxidants due to the lower oxidation potential and the more effective steric protection. Transition metal salts and complexes such as silver(I) perchlorate, tetrafluoroborate, bis(acetonitrile)-dichloropalladium(II) convert 2 to the corresponding cation radical, on the other hand, trimesitylphosphine works as a ligand of transition metals [35]. Cation radicals of various triarylphosphines have been studied by EPR and the structure has been elucidated by anisotropic hyperfine coupling constants ( Table 3).…”

Section: Cation Radicals Of Crowded Triaryl-phosphinesmentioning

confidence: 99%

Synthesis, Structure and Properties of Crowded Triarylphosphines

Sasaki¹,

Yoshifuji

2007

COC

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Section: Cation Radicals Of Crowded Triaryl-phosphinesmentioning

confidence: 99%

Synthesis, Structure and Properties of Crowded Triarylphosphines

Sasaki¹,

Yoshifuji

2007

COC

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“…The Al atoms, bound to a trimethyl molecule could possibly replace the As atoms that are bound in an As 2 O 3 configuration through ligand exchange. 6,16 Other reaction pathways are possible including already oxidized Al interacting with the native oxides or a two step reaction occurring. The ligand exchange mechanism is not as favorable for the TMA molecule with the As 2 bonding arrangement.…”

mentioning

confidence: 99%

GaAs interfacial self-cleaning by atomic layer deposition

Hinkle¹,

Sonnet²,

Vogel³

et al. 2008

Applied Physics Letters

392

311

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The reduction and removal of surface oxides from GaAs substrates by atomic layer deposition ͑ALD͒ of Al 2 O 3 and HfO 2 are studied using in situ monochromatic x-ray photoelectron spectroscopy. Using the combination of in situ deposition and analysis techniques, the interfacial "self-cleaning" is shown to be oxidation state dependent as well as metal organic precursor dependent. Thermodynamics, charge balance, and oxygen coordination drive the removal of certain species of surface oxides while allowing others to remain. These factors suggest proper selection of surface treatments and ALD precursors can result in selective interfacial bonding arrangements.

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“…Thus, an excess amount of the Grignard reagent was added to the diarylchloroarsine in order to introduce the third aryl group, and arsines 5aA and 6aA were obtained in moderate yields. Use of chlorodioxarsolane 20 in place of arsenic trichloride did not improve the results. Phosphines 7 and 8 and arsine 9 were prepared analogously.…”

Section: Resultsmentioning

confidence: 77%

Synthesis and Redox Properties of (3-Phenothiazinomesityl)- and (4-Phenothiazinoduryl)dimesitylphosphines and the Corresponding Arsines

2005

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To construct the novel redox systems possessing the trimesitylphosphine-or trimesitylarsine-type substructure as a reversible redox site, dimesityl(3-phenothiazinomesityl)phosphine, dimesityl(4phenothiazinoduryl)phosphine, and the corresponding arsines were synthesized (mesityl ) 2,4,6trimethylphenyl, duryl ) 2,3,5,6-tetramethylphenyl). The key synthetic intermediates, (3-bromomesityl)dimesitylphosphine, (4-bromoduryl)dimesitylphosphine, and the analogous arsines were prepared by successive addition of the corresponding Grignard reagents to phosphorus or arsenic trichloride. The (bromoaryl)phosphines and -arsines were converted to the corresponding (iodoaryl)phosphines and -arsines and coupled with phenothiazine in the presence of copper to afford the phenothiazinophosphino-and phenothiazinoarsinobenzenes. The cyclic voltammograms of the phenothiazinopnictogenobenzenes thus obtained exhibit two-step redox waves corresponding to oxidation on the pnictogen as well as phenothiazine redox centers. The phenothiazino group contributes to stability of the redox systems, and the phenothiazinophosphinobenzenes display two-step nearly reversible redox waves at -78 °C. On the other hand, the cyclic voltammograms of the phenothiazinoarsinobenzenes consist of the first reversible wave followed by the second irreversible wave, suggesting decomposition at the unstable arsenic redox center. The pnictogen redox centers of the phenothiazinopnictogenobenzenes are unstable as compared with those of the corresponding trimesityl derivatives. Chemical oxidation of the phenothiazinophosphinobenzenes and phenothiazinoarsinobenzenes by tris(4-bromophenyl)aminium perchlorate, which can oxidize trimesitylphosphine and trimesitylarsine to the corresponding cation radicals, was studied by EPR. However, only the nitrogen-centered cation radical was observed probably because of the instability of the phosphorus as well as arsenic radical centers.

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Tertiary arsines: a new synthesis route and an NMR study

Cited by 33 publications

References 0 publications

Synthesis, Structure and Properties of Crowded Triarylphosphines

Synthesis, Structure and Properties of Crowded Triarylphosphines

GaAs interfacial self-cleaning by atomic layer deposition

Synthesis and Redox Properties of (3-Phenothiazinomesityl)- and (4-Phenothiazinoduryl)dimesitylphosphines and the Corresponding Arsines

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