337909-50-9Relevant academic research and scientific papers
Synthesis, crystal structures, and vibrational spectra of trans-[Pt(N3)4X2]2-, X = Cl, Br, I
Schr?der,Preetz
, p. 1757 - 1762 (2000)
By oxidative addition to (W-Bu4N)2[Pt(N3)4] with the elemental halogens in dichloromethane trans-(n-Bu4N)2- [Pt(N3)4X2], X = Cl, Br, I are formed. X-ray structure determinations on single crystal of trans-(Ph4P)2[Pt(N3)4Cl2] (triclinic, space group P1?, a = 10.352(1), b = 10.438(2), c = 11.890(2) ?, α= 91.808(12), β= 100.676(12), γ = 113.980(10)°, = 1), trans-(Ph4P)2[Pt(N3)4Br2] (triclinic, space group P1?, α = 10.336(1), b = 10.536(1), c = 12.119(2) ?, α = 91.762(12), β = 101.135(12), γ = 112.867(10)°, Z = 1) and trans-(Ph4P)2[Pt(N3)4I2] (triclinic, space group P1?, α = 10.186(2), b = 10.506(2), c = 12.219(2) ?, α = 91.847(16), β= 101.385(14), γ= 111.965(18)°, Z = 1) reveal, that the compounds crystallize isotypically with octahedral centrosymmetric complex anions. The bond lengths are Pt-Cl = 2.324, Pt-Br = 2.472, Pt-I = 2.619 and Pt-N = 2.052-2.122 ?. The approximate linear Azidoligands with Nα-Nβ-Nγ-angles = 172.1-176.8° are bonded with Pt-Nα-Nβ-angles = 116.2-121.9°. In the vibrational spectra the platinum halogen stretching vibrations of trans-(n-Bu4N)2[Pt(N3)4X 2] are observed in the range of 327-337 (X = Cl), at 202 (Br) and in the range of 145-165 cm-1 (I), respectively. The platinum azide stretching modes of the three complex salts are in the range of 401-421 cm-1. Based on the molecular parameters of the X-ray determinations the IR and Raman spectra are assigned by normal coordinate analysis. The valence force constants are fd(PtCl) = 1.90, fd(PtBr) = 1.64, fd(PtI) = 1.22, fd(PtNα) = 2.20-2.27 and fd(NαNβ, NβNγ) = 12.44 mdyn/ ?.
