14494-80-5Relevant academic research and scientific papers
Synthesis and Reactivity of Selones and Dihaloselones: Complexation of Selones with d8- and d10-Metal Ions
Yadav, Sangeeta,Singh, Harkesh B.,Butcher, Ray J.
, p. 2968 - 2979 (2017)
The reactivities of the monodentate selone LSe (L = 1,3-dibutylbenzimidazol-2-ylidene; 10a), the bidentate pyridine-functionalized selone L′Se (L′ = 1-pyridyl-3-butylimidazol-2-ylidene; 10b) and the multidentate ether-functionalized selone L′′Se {L′′ = 1,3-bis[2-(2-methoxyethoxy)ethyl]benzimidazol-2-ylidene; 10c} with soft transition-metal halides (PdX2, PtX2, ZnX2, CdX2 and HgX2; X = Cl, Br, I) are probed. Compounds 10a and 10c react with metal halides to give complexes of the type [Cu2(μ-X)2(LSe)2] (X = Br, I; 11, 12), [MX2(LSe)2] (13–22) or [M2X2(μ-X)2(L′′Se)2] (X = Cl, Br, I; 26–32), whereas 10b and HgX2 (X = Cl, Br, I) form 1:1 complexes HgX2(L′Se) (21–23), in which the pyridine moiety coordinates to the metal centre to form a six-membered chelate. The reactivity of 10a was compared with those of triphenylphosphine and triethylamine. The reaction of 10c with molecular iodine yields the diiodoselone L′′SeI2 (35), which disproportionates to give the selone adduct of the iodonium ion, [(L′′Se)2I]+I3– (36). The reactions of LSeX2 [X = Cl (34a), Br (34b), I (34c)] with organotellurium compounds, namely, tellone LTe (10d) and diphenyl telluride (37), afford the dihalotellones LTeX2 [X = Cl (38a), Br (38b), I (38c)] and Ph2TeX2 [X = Cl (39a), Br (39b), I (39c)], respectively. The oxidizing properties of LSeX2 (34a–34c) were investigated with rare-earth metals.
Far-infrared, raman, and 31P nuclear magnetic resonance spectral investigation of the electronic effects in triarylphosphine complexes of cadmium(II) halides
Goel, Ram G.,Henry, William P.,Srivastava, Ramesh C.
, p. 1727 - 1731 (2008/10/08)
The complexes CdX2[P(p-YC6H4)3]2 and CdX2[P(m-CH3C6H4)3] 2, where X = Cl, Br, or I and Y = H, CH3, CH3O, or (CH3)2N, have been synthesized, and their far-infrared, Raman, and 31P NMR spectra have been examined. The vibrational spectral data are in accord with a pseudotetrahedral structure of C2v skeletal symmetry in the solid state. The molecular nature of the complexes, in solution, is established by molecular weight measurements in 1,2-dichloroethane. The 31P NMR spectra of the complexes in dichloromethane at ambient temperatures consist of a single broad resonance, indicating fast phosphine exchange on the NMR time scale. The satellites due to the 113Cd-31P and 111Cd-31P spin-spin couplings are observed for all the complexes except CdCl2(PPh3)2 at lower temperatures. For the complexes of a given phosphine, the magnitude of cadmium-phosphorus nuclear spin-spin coupling increases linearly with the Pauling's electronegativity of X. For the given halide, the coupling constants increase linearly with the pKa value of the phosphine. No simple relationship between the 31P chemical shifts and other parameters is observed.
