Phosphorous species

Knops, L. A., Northrop, D. M., and Person, L. C. (2006). Capillary electrophoretic analysis of phosphorous species in clandestine methamphetamine laboratory samples. J. Forensic Sci. 51, 82—86. 

Resonance (ESR). The effects of radiation on arsenic, antimony and bismuth compounds are, however, considerably less documented a compilation of the corresponding information has been published in Landolt-Bomstein and this subject is periodically reviewed in Specialist Reports of the Royal Chemical Society. The purpose of this chapter is not to present an exhaustive compilation of all the species produced by radiolysis of organic compounds which contain an As, Sb or Bi atom, but only to deal with the most important types of radiogenic radicals formed from these compounds and, when possible, to compare the structures of these radicals with those of the corresponding phosphorous species. 

The related t rt-butylsulfinyl compound 432 may also be converted, by a different mechanism, to the thioxopenam 290b (PPh3, refluxing CH2CI2). Intermediates of this reaction are the sulfinic acid 433 (which could be trapped by diazomethane) and its triphenylphosphine addition product, representable as the penta-coordinate phosphorous species 434 [160]. 

Fourier Transform Infrared Spectroscopy (FTIR) provided a convenient tool by which reaction success was qualitatively evaluated. The spectrum of unfunctionalized PVBC on the polyethylene support is included in Figure 6a. Because of the intense absorbances of the PA, MPE, and IPE species, FTIR proved to be a convenient tool to investigate the progression of the syntheses. Note the changes in the spectra as the membranes were functionalized especially in the range of 900-1250 wavenumber for the MPE and IPE functional groups The PA functionalized membranes have several other very broad characteristic absorbances Figures 6b, 6c, and 6d contain the FTIR spectra of the membranes functionalized with the phosphorous species. Note that the intense absorbances around 3000 wavenumber are derived from the polyethylene support. 

As observed in Table 4.11, the metallic fragments bonded to the P4 molecules are, in general, soft Lewis acids that can both accept and back-donate electron density to the ligand. The 7r-acceptor capability characteristic of three-coordinated phosphor species appears thus to play also an important role in the case of P4. Figure 4.55 reproduces a drawing of the structure of the compound (np)3Ni(P4) determinated by X-ray diffraction analysis. The coordination of... 

Table 2.2 Relative amounts of the phosphorous species before and after PPA aging.

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