Measuring the Electronic Effect of Some Phosphines and Phosphites
Başlık:
Measuring the Electronic Effect of Some Phosphines and Phosphites
Yazar:
Abushhewa, Sanaa, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (65 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-07C.
Advisors: Alan Brisdon.
Özet:
This project is concerned with ways of making an assessment of the electronic properties of some phosphine (PR3), phosphinite (R2POR) and phosphite (P(OR)3) ligands. The phosphines studied were PPh3, tris(mesityl)phosphine, PPh2C6H4OCH3 and (NCCH2CH2)3P. Phosphites and phosphinites were prepared by reaction of PCl3 and Ph2PCl or 2, 2'-biphenyl chlorophosphite, respectively, with alcohols under nitrogen conditions at ice temperature. The compounds 1H, 1H, 2H, 2H-perfluorodecyldiphenyl phosphinite, 3-fluorophenyldiphenyl phosphinite, 2-fluorophenyldiphenyl phosphinite, diphenyltrifluoroethyl phosphinite, diphenylhexafluoroisopropyl phosphinite and propyldiphenyl phosphinite were prepared.Characterisation, by phosphorus, proton and fluorine NMR spectroscopy confirmed the identity of the P(III) ligands.The selenides of these phosphorus (III) ligands were synthesised by reaction with selenium in toluene at reflux. The 1J(PSe) coupling constants were measured from the 31P{1H} NMR spectra, and ranged from 720 Hz in diphenyl(o-tolyl)phosphine selenide to 1044 Hz in 2-2'biphenyltrifluoroethyl phosphinite selenide.The [Mo(CO)5P] complexes (P = phosphorus(III) ligand) were also synthesised by the reaction of the ligand with molybdenum hexacarbonyl in toluene at reflux over a period of time.A comparison of the 1J(PSe) coupling constants of the phosphine and phosphite selenides and highest A1 (CO) stretching frequency of the [Mo(CO)5P] complexes was undertaken.
Notlar:
School code: 1543
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(681666.1) | 681666-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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