Bis(bidentate) complexes of iminobis(diphenylphosphine chalcogenides)[M{N(XPPh₂)₂-X,X′}₂](X = S or Se; M = Ni, Pd or Pt)

Abstract

The compound NH(SePPh,), has been synthesised from NH(PPh,), and selenium in refluxing toluene. A range of complexes [M{N(XPPh,),-X, X'},] (X = Se, M = Pt 1 or Pd 2; X = S, M = Pt 3, Pd 4 or Ni 5) of the monoanions derived from NH(SePPh,), and its sulfur analogue have been prepared. The new compounds have been characterised by microanalysis, NMR and IR spectroscopy. The crystal structures of NH(SePPh,),, 1, 2 and 5 were determined. The neutral NH(SePPh,), crystallised as H-bonded dimer pairs with a noticeable difference in the hydrogen bonded and nonhydrogen bonded P=Se bond lengths. The P=Se groups are approximately anti. On complexation the anionic ligands are bidentate and in all cases the resulting MX,P,N rings are distinctly puckered.

Syntheses and Coordination Chemistry of Aminomethylphosphine Derivatives of Adenine

“…The latter is due to the inequivalence of the two phosphorus atoms arising from the Ph 2 P(Se)CH 2 NCH 2 P( 77 Se)Ph 2 isotopomer. Similar PϪP couplings in the selenium satellites were also observed in Ph 2 P(Se)NHP(Se)Ph 2 ( 2 J P,P ϭ 29 Hz) [24] and Ph 2 P(Se)OP(Se)Ph 2 ( 2 J P,P ϭ 44 Hz). [25] The 1 H NMR spectra of 1b [14,26] and 3b [27] in [D 6 ]DMSO or [D 6 ]DMSO ϩ D 2 O have been reported previously.…”

Synthesis of Novel Vinylic P–Se Heterocycles from Selenation of Alkynes by [PhP(Se)(μ‐Se)]2

“…[10][11][12][13] We have also reported the use of FcP(S)S 2 P(S)Fc (Fc = ferrocenyl) and WR in the preparation of novel metal complexes, C-P-S and C-P-Se heterocycles by reaction with a variety of reactive organic substrates/functionalities including CS 2 , C=O, C=C double bond and CϵN triple bonds. [8,[14][15][16][17][18][19] To date, no general method for the synthesis of vinylic selenium-containing heterocycles has been established. We have focused our attention on the preparation of a series of novel vinylic heterocycles by reaction of WR with alkynes and here describe a series of new heterocycles.…”

A Dinuclear Palladium(II) Complex of the {N(SPPh2)2}- Ligand – Synthesis and Structure

“…The IR spectrum of 1 shows the characteristic asymmetric P-N-P stretching at ν asym = 1161 cm −1 and the P-S stretching at ν = 569 cm −1 . These values are matching well with those reported for [Pd(κ-S,S )-{N(SPPh 2 ) 2 } 2 ] (ν asym,P−N−P = 1161 cm −1 , ν P−S = 571 cm −1 ) or [Ni-(κ-S,S )-{N(SPPh 2 ) 2 } 2 ] (ν asym,P−N−P = 1150 cm −1 , ν P−S = 565 cm −1 ) [12,21]. However, it is not possible to discriminate the two different coordinating ligands by the obtained IR data.…”