86780-29-2Relevant academic research and scientific papers
Oxidation of Elemental Antimony by Substituted ortho-Benzoquinones
Tian, Zhigang,Tuck, Dennis G.
, p. 1381 - 1386 (2007/10/02)
The oxidation of elemental antimony by the o-quinones Y4C6O2-o (Y = Cl or Br) in diethyl ether gives the unusual antimony(V) products Sb(O2C6Y4)2.5*nEt2O (Y = Cl, n = 1.5; Y = Br, n = 1).The same quinones, and 3,5-di-tert-butyl-1,2-benzoquinone, upon treatment with Sb + 0.5 X2 (X = Br or I) in toluene, give the antimony(III) derivatives Sb(cat)X (cat = substituted catecholate anion).The oxidations are shown by electron spin resonance spectroscopy to proceed via the o-semiquinone intermediates.Adducts of Sb(cat) I with bidentate neutral donors have been prepared.The structure of Sb(dbc)I(bipy) (dbc = 3,5-di-tert-butylcatecholate, bipy = 2,2'-bipyridine) has been shown to be that of a pseudo-octahedral molecule with a stereochemically active lone pair of electrons.Crystal parameters for Sb(dcb)I(bipy)*0.5bipy: triclinic, space group P1, a = 9.779(4), b = 18.554(7), c = 8.944(3) Angstroem, α = 100.94(3), β = 115.11(3), γ = 86.82(4) deg, Z = 2 and R = 0.044 for 3307 unique reflections.
The Synthesis, Structure, and Chemistry of 10-Pn-3 systems: Tricoordinate Hypervalent Pnictogen Compounds
Arduengo, Anthony J.,Stewart, Constantine A.,Davidson, Fredric,Dixon, David A.,Becker, James Y.,et al.
, p. 627 - 646 (2007/10/02)
A set of previously unknown tricoordinate pnictogen compounds, 10-Pn-3 ADPnO, has been synthesized.The chemistry of these systems has been studied.Reactions with alcohols, α-dicarbonyl compounds, halogens, transition metals, protic acids, and acetylenes are among the chemistry described.In general, it was found that 10-As-3 ADAsO and 10-Sb-3 ADSbO systems behave similarly and offer different chemistry from that of the 10-P-3 ADPO system.Among these unusual reactions is a novel C-C bond forming reactions with hexafluoro-2-butyne.The electronic structure of these systems has been considered in light of preliminary ab initio molecular orbital calculations.The cyclic voltametry data on the 10-Pn-3 ADPnO system have been measured and are in accord with theoretical expectations.X-ray structures on a wide variety of derivatives provide insight into the chemistry of these systems.Phosphorus compounds with coordination numbers ranging from 2 to 6 have been characterized, and a trend is observed for 31P-15N coupling constants and phosphorus coordination number.
THE REACTION OF TETRACHLORO-o-BENZOQUINONE WITH THE SULFIDES OF TRIPHENYLARSINE AND TRIPHENYLSTIBINE
Sidky, M. M.,Mahran, M. R.,Abdou, W. M.
, p. 129 - 136 (2007/10/02)
The reaction of tetrachloro-o-benzoquinone (1) with triphenylarsine sulfide gives a hydrogen-bonded complex of the corresponding hydroquinone and triphenylarsine oxide (5).The same quinone reacts with triphenylstibine sulfide yielding the cyclic adduct (9).In both cases, elemental sulfur is the other product.Possible reaction mechanisms are considered and the structural assignments are based on analytical, chemical and spectroscopic results.
