title: Gas-phase on-line generation and infrared spectroscopic investigations of polyphosphazenes, (NPX2)3 where X=F, Cl and Br.
abstract: Gas-phase infrared spectra of polyphosphazenes (phosphonitrilic halides trimer), (NPX2)3 where X=F, Cl and Br have been recorded. The molecules were generated for the first time by an on-line process using solid (NPCl2)3 as a precursor passed over heated sodium fluoride and potassium bromide at about 550 and 700 degrees C for (NPF2)3 and (NPBr2)3 production, respectively. The products were characterized by the infrared spectra of their vapors. The low-resolution gas-phase Fourier transform infrared spectra reported for the first time show strong bands centered at 1295, 1215 and 1200 cm-1, assigned to nu7(E'), in plane PN stretching mode of (NPX2)3, where X=F, Cl and Br, respectively.
authors.affiliation: Atomic Energy Commission of Syria, Department of Chemistry, P.O. Box 6091, Damascus, Syria. aallaf@aec.org.sy
authors.forename: Abdul W
authors.initials: AW
authors.lastname: Allaf
mesh_terms: D001965:Bromides / Q000737:chemistry; D001966:Bromine / Q000737:chemistry*; D002713:Chlorine / Q000737:chemistry*; D019281:Dimerization; D005461:Fluorine / Q000737:chemistry*; D005740:Gases; D008956:Models, Chemical; D009943:Organophosphorus Compounds / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D012969:Sodium Fluoride / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013696:Temperature
chemical_list: D001965:Bromides; D005740:Gases; D009943:Organophosphorus Compounds; D011108:Polymers; D017680:Potassium Compounds; C108974:poly(phosphazene); D005461:Fluorine; D002713:Chlorine; D012969:Sodium Fluoride; C039004:potassium bromide; D001966:Bromine