Mercury(II) complexes of tris(tert-butyl)phosphine and tri(o-tolyl)phosphine

Abstract

Tris(tert-butyl)phosphine and tri(o-tolyl)phosphine form 1:1 complexes with mercury(II) halides and with mercury(II) thiocyanate. Physicochemical measurements, i.e. conductance, molecular weight determinations, infrared and Raman spectra indicate a dimeric structure of C2h skeletal symmetry. The Hg—X and Hg—P stretching frequencies for all complexes have been assigned.

Synthesis, solid state 31P CP-MAS NMR infrared and Raman studies of mercury(II) complexes of 1,3,5-triaza-7-phosphaadamantane (PTA)

“…Bell et al (17) have pointed out that small structural changes can have a marked influence on the IR spectral pattern but sometimes major structural variations can have very little influence on the spectrum. The observed frequencies are similar to other phosphinemercury halide complexes (17,18) as shown in Table 4, and so we feel confident that our assignments are correct. The changes observed for v,(HgX) for C1, Br, and I are similar to the other complexes and show the same general trends.…”

Mercury(II) cyanide complexes of bulky phosphines. Preparation, characterization, and spectral studies

“…However, unlike mercury(I1) halides, mercury(I1) cyanide does not form any complex with tri-o-tolylphosphine (7). This is indeed due to the large steric requirement and relatively low basicity of tri-o-tolylphosphine.…”

“…In continuation of our investigations on metal complexes of sterically hindered phosphines we have undertaken a systematic study of phosphine complexes of mercury(I1) (7,8,14) and other d l 0 metals (15,16). In the present work complexes of mercury(I1) cyanide with tri-teut-butyl-, tricyclohexyl-, tri-o-tolyl-, and tri-p-tolylphosphines were investigated.…”

“…In another study ( 9 , both 1 : 1 and 1 : 2 complexes of mercury(I1) cyanide were obtained with trimethylphosphine. Apart from these studies no report has appeared on phosphine complexes of mercury(I1) cyanide.In continuation of our investigations on metal complexes of sterically hindered phosphines we have undertaken a systematic study of phosphine complexes of mercury(I1) (7,8,14) and other d l 0 metals (15, 16). In the present work complexes of mercury(I1) cyanide with tri-teut-butyl-, tricyclohexyl-, tri-o-tolyl-, and tri-p-tolylphosphines were investigated.…”

Synthesis and characterization of triarylphosphine complexes of zinc(II) halides

“…Vibrational spectral data for 1 : 2 triarylphosphine complexes of zinc(II) halides be assigned to bridged Zn-X stretching frequencies ( Table 3). The ratio ν b (M-X)/ν t (M-X) for [Zn 2 Cl 6 ] 2− , Al 2 X 6 and the dimeric square planar complexes M 2 X 4 L 2 (where M = Pt or Pd; X = Cl, I; L = PR 3 ) is reported 11,16,17 to vary from 0.63 to 0.83. As shown in Table 3, the ν b (M-X)/ν t (M-X) ratios for the ZnX 2 PR 3 complexes are in the range 0.72 to 0.83.…”