- Synthesis of a Homologous Series of Trialkyl Arsines (C3-C12) and Applications of Arsenic Triiodide as a Synthetic Precursor
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This work presents some modifications in the post-synthetic processing for a classical arsenic reagent: AsI3. In comparison with the widely used analog, the trichloride, arsenic triiodide presents several advantages such as low toxicity, air stability, and low volatility. It was used as a synthetic precursor in the preparation of a variety of arsenic(III) derivatives like arsines, arsenites, and thioarsenites. Besides that, AsI3 was submitted to a diversity-oriented Grignard reaction in the preparation of a homologous series of trialkyl arsines ranging from AsC3H9 to AsC12H27. The series was analyzed by comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry to provide a trialkyl arsines library that can be used for the direct analysis of natural samples.
- Ligiéro, Carolina B.P.,Francisco, Marcos A.S.,Gama, Michelle S.,Carbonezi, Carlos A.,Leocadio, Isabela C.L.,de Souza, Wladmir F.,Esteves, Pierre M.
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p. 912 - 916
(2021/03/17)
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- Structural studies of derivatives of methinyltricobalt enneacarbonyls. I. The crystal structure of CH3CCo3(CO)8P(C6H5) 3
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The crystal and molecular structure of CH3CCo3(CO)8P(C6H5) 3 has been determined by three-dimensional X-ray analysis. Crystals of the compound are monoclinic, space group C2h5-P21/c, with four molecules in a cell of dimensions a = 12.19 (2), b = 16.11 (2), c = 17.19 (4) ?; β = 120.0 (1)°. X-Ray data were collected by conventional film techniques using Co Kα radiation, the intensities of 2189 independent reflections being measured photometrically. The structure has been refined isotropically by modified full-matrix least-squares techniques to a conventional R factor of 0.099. The monomeric molecular structure closely resembles the parent compound CH3CCo3(CO)9 being based on a Co3 triangle. The P(C6H5)3 unit has simply replaced one of the equatorial carbonyl groups, causing small distortions in the remainder of the molecule. Co-Co bond lengths are in the range 2.490-2.510 (6) ?.
- Brice,Penfold,Robinson, Ward T.,Taylor, Susan R.
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p. 362 - 367
(2008/10/08)
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