共查询到20条相似文献,搜索用时 11 毫秒
1.
Il'yas S. Nizamov Alexey E. Popovich Elvira S. Batyeva Nail M. Azancheev Vladimir A. Al'fonsov 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):167-178
Abstract The reactions of tetraphosphorus decasulfide and Lawesson's reagent with tetra-, tri- and dialkoxysilanes were studied. On the basis of these reactions, new S-silyl esters of phosphorus(V) thioacids have been prepared. The prepared compounds were identified by IR, 1H, and 31P NMR and mass spectra as well as elemental analyses. 相似文献
2.
Christopher Chan Edward R. Cole Peter T. Southwell-keely 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):261-269
Abstract Hydrogen abstraction may be postulated as the first step in reactions of aryl sulfenamides with the stable diphenylpicrylhydrazyl free radical. Differences in the reactivity of the sulfenamides are controlled by steric and electronic effects of the substituents, with attention drawn to the capacity of the divalent sulfur atom to relay these effects. Origins of decomposition products are discussed. 相似文献
3.
4.
Miguel E. Alonso Gonzalo Martín A. Wladimir Chitty 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-2):147-160
Abstract The transfer of hydrogen atoms from the gamma carbon of dialkyl disulfides upon electron impact is presented and its occurrence is formally shown by the electron ionization mass spectrum of 1-(2′,2′-dideuteriocyclohexyl)-2,3-dithiapent-1,1′-ene (4b). Also, the spectrum of 1-(2′,2′-dideuteriocyclohexyl)-2-thiahex-1-ene (3b) is analyzed in terms of hydrogen/deuterium transfer, where it is absent. This result is compared with selected mass spectral data of eighteen other dialkylthianes. Evidence is put forth to indicate that dialkyl sulfides are prone to undergo only 1,3-H shift upon electron inpact, whereas in dithianes 1,3- and 1,5-Hydrogen transfer take place. The evidence collected suggests that neither 1,2- nor 1,4-hydrogen transfer occurs in both sulfur derivatives. 相似文献
5.
Iraj Mohammadpoor-Baltork Hamid Reza Memarian Kiumars Bahrami 《Phosphorus, sulfur, and silicon and the related elements》2013,188(11):2315-2321
A variety of aliphatic, aromatic, and heteroaromatic thiols were rapidly and cleanly converted to their corresponding disulfides in excellent yields using n-butyltriphenylphosphonium dichromate (BTPPDC) in acetonitrile solution under solvent-free conditions and microwave irradiation. Selective oxidation of thiols in the presence of other oxidizable functional groups, such as alcohol and sulfide, is a noteworthy advantage of this method. 相似文献
6.
Ryu Sato Reiko Kawasaki Hiroshi Takahashi Shizuko Yamaichi Minoru Saito 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-2):29-33
Abstract Nitrosobenzene and phenylhydroxylamine were reduced with elemental sulfur in liquid ammonia and amines to give aniline as the major product. Although hydrazobenzene was obtained by the reactions of azoxybenzene and azobenzene with elemental sulfur in liquid ammonia and amines, the expected aniline was not obtained. The utilities of elemental sulfur in liquid ammonia and amines as reductant is discussed. 相似文献
7.
Michael B. Hursthouse Ezzeldine H. Ibrahim Harold G. Parkes Leylacaron S. Shaw Robert A. Shaw David A. Watkins 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-2):261-266
Abstract The syntheses in solution of (i) 2,4-dialkylamino-, (ii) 2,4-dimethyl-, and (iii) 2,4-diphenyl-2,4-dithio-cyclodiphosph(V)azanes, [R′P(S)NR]2 (R′ = NHR, Ph, or Me; R = alkyl), derived from thiophosphoryl trichloride, methylphosphonothioic and phenylphosphonothioic dichlorides and primary alkylamines are described. N.m.r. spectroscopic properties for these cyclodiphosph(V)azanes and their monomeric precursors, R′P(S)(NHR)2 (R′ = NHR, Ph, or Me; R = alkyl), are presented and structural inferences are drawn from this data. The X-ray crystal structure of [PhP(S)NBui]2 is reported. 相似文献
8.
T. Akasaka T. Yoshimura N. Furukawa S. Oae 《Phosphorus, sulfur, and silicon and the related elements》2013,188(2):211-217
Abstract The mechanism of the reactions of diphenyl N-bromosulfilimine (I) with such nucleophiles as sulfides, phosphines and tertiary amines was investigated. In the presence of water, (I) reacts with sulfides or phosphines to afford the corresponding sulfoxides or the phosphine oxides in moderate yields; however, the reaction with tertiary amine gave only the N-t-aminosulfilimine derivative. The effect of ring size in the reaction with cyclic sulfides suggests that the reaction proceeds via initial bromine transfer from the nitrogen atom to the sulfur atom of the cyclic sulfides followed by SN2 type substitution of bromide on the sulfur atom of the cyclic sulfide with the sulfilimino group. The phosphine oxide obtained in the reaction of (I) with optically active methyl n-propyl phenyl phosphine was racemized but retained a small portion of the optical activity. In the case of tertiary amines, even 1,4-diazabicyclo-(2,2,2)-octane (DABCO), in which the back side of the nitrogen atom is blocked, reacted smoothly to afford the corresponding ammonium salts, suggesting the reaction to be of SN2 type on the nitrogen atom of the sulfilimine. 相似文献
9.
Homaid A. Al-Madfa Robert A. Shaw Sidit Ture 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):333-338
Abstract The reactions of hexachlorocyclotriphosphazatriene, N3 P3 CI6, with 2, 2-dimethylpropane-1, 3-diol yield monospiro-, N3 P3 Cl4 [(OCH2)2 CMe2, dispiro-, N3 P3 Cl4((OCH2)2CMe2|2, and trispiroderivatives, N3 P3 ((OCH2)2, CMe2]3. An ansa, N3 P3 CI4 [(OCH2)2 CMe2]2 and a spiro-ansa, N3 P3 Cl2- ((OCH2), CMe2,]2 and a doubly-bridged compound, (N3 P3 Cl4,)2[(OCH2)]2 were also isolated. Product types and relative yields were compared with those arising from propane-1, 3-diol. The yields of ansa products from the reactions of the dimethyl diol seem to be considerably enhanced relative to those of its unmethylated analogue. 31P and 1H n.m.r. spectra are reported. 相似文献
10.
邻菲咯啉(Phen)与过渡金属离子在液相中的反应速度很快,瞬间即可完成,形成稳定的配合物。过渡金属氯化物在水溶液中反应时,一般是以水合离子[M(H_2O)_6]~(2+)的形式参加反应。而在固相中参加反应物质的形式是其物质本身的凝聚态分子。因此,尽管是同一反应物,但在固相,液相反应中,参加反应物质的形式不同,可能产生两种不同的反应结果。为了比较固、液相反应的差别,寻找固相反应的规律性。我们研究了FeCl2_·4H_2O,CoCl_2·6H_2O,NiCl_2 相似文献
11.
《Journal of Coordination Chemistry》2012,65(4):271-275
Abstract The kinetics and mechanism of reactions of (2,2′-dipyridyl)W(CO)4 with SnCl4, (C6H5)SnCl3, (n-C4H9)SnCl3 and (C6H5)2SnCl2, and of (o-phenanthroline)Mo(CO)4 with GeI4 have been investigated employing stopped flow and conventional kinetic techniques. The oxidizing agent-dependent rate laws are encompassed in a mechanism which involves reversible addition of two successive molecules of the oxidant to the substrate, followed by other, rapid, steps. For the reaction of (C6H5SnCl2 with (dipy)W(CO)4 at 95–115°, a parallel reaction path probably involving rate-determining dissociation of CO was also observed. Rates were found to be very sensitive to the nature of the substituents bonded to the Group IV-A metal, being greatest for electron-withdrawing substituents. Different rate laws were observed for reactions which yielded products of different stereochemistries. 相似文献
12.
This paper analyzed thiophenic compounds in Sunniland oils and source rock extractsfrom the South Florida Basin, USA using GC-MS, and compared them with those of oilsfrom shales. We found that oils derived from carbonates versus shales have different distribu-tions of thiophenic compounds. Used in conjunction with such other geochemical parametersas n--alkane, sterane and terpane compositions, thiophenic compounds will be a useful toolfor oil--oil and oil--source correlations. 相似文献
13.
F. F. Abdel-latif R. M. Shaker 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):217-221
Abstract Several new thiazole and thiazolo[2,3-a]pyridine derivatives were prepared by reaction of the thiazolin-4-one derivatives 2 (synthesised from α-cyano-2-ethylacetanilide and thioglycollic acid) with acrylonitriles 1a-h. 相似文献
14.
15.
Wagnat Wahba Wardaman 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):275-293
Abstract The ethyl 2-diazo-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate 2 reacts with ethyl acetoacetate to give the hydrazone derivative 4. The reactivity of 4 towards a number of different reagents including active methylene compounds as well as the use of 4 to synthesize fused heterocyclic systems is described. 相似文献
16.
17.
18.
19.