bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation of phenyl substituted propargylic alcohol dicobalt hexacarbonyls and their reactions with active methylene compounds in the presence of acid
Authors: Sun Shou‐Heng , Chen Wei‐Bing , Zhang Wen‐Wei , Li Dong‐Wen , Meng Qing‐Jin , You Xiao‐Zeng 
Published: September 2010

AbstractEight new complexes with the formula [PhC2C(OH)R1R2]Co2(CO)4 were prepared from phenyl substituted propargylic alcohols and dicobalt octacarbonyl. The reactions of these propargylic alcohol complexes with active methylene compounds, 2,4‐pentanedione or ethyl acetoacetate, in the presence of an acid, HBF4(40%) + P2O5 (in excess) or BF2·Et2O, at room temperature in dichloromethane were investigated. From the 1‐alkyl substituted tertiary propargylic alcohol complexes, three new conjugated ene‐yne complexes produced by intramolecular dehydration reaction were isolated in high yields (82–95%). On the other hand, four new alkylated complexes were obtained with satisfactory yields (44–66%) from the secondary propargylic alcohol complexes. The influence of other acids, phosphorus pentoxide and polyphosphoric acid, on both dehydration reaction and alkylated reaction was also studied.
Synthesis, structure and properties of an imidazolate bridged copper, zinc binuclear complex
Authors: Mao Zong‐Wan , Chen Dong , Tang Wen‐Xia , Yu Kai‐Bei , Liu Li 
Published: September 2010

AbstractA new imidazolate bridged Cu2+, Zn2+ binuclear complex [(dtma) CuImZn (dtma)]ClO4 · 2.5H2O taken as active site model for Cu, Zn‐SOD has been synthesized and its crystal structure determined. All the bond lengths, bond angles and the distance between Cu and Zn atoms in Cu‐Im‐Zn core of the model complex are close to those in Cu, Zn‐SOD. ESR parameters of the model complex as a function of pH show that the imidazolate bridge is stable in pH range 10–12, and is broken on Zn side at pH ∼9. With decreasing pH, the imidazole is released at pH ∼4 and the dtma ligand dissociates from the Cu containing fragment at pH ∼2.4.
Photochemical naphthylation at α‐carbon atom of carbonyl and its equivalences
Authors: Wu Bi‐Qi , Zeng Fan‐Wen , Li Wei , Zhao Yong , Wu Guo‐Sheng 
Published: September 2010

AbstractThe photostimulated reaction of halonaphthalene with a series of carbanions derived from propionic acid derivatives in liquid ammonia led to the naphthylation at α‐carbon of the carbanions in an isolated yield ranging from 25% to 86%. In all cases, the dehalonaphthalenes were found to be by‐products and the reaction was inhibited by p‐dinitrobenzene. An electron transfer from the carbanion to the halonaphthalene followed by ejection of halogen led to naphthyl radical, as predicted by comparing the LUMOs of the carbanions and the halonaphthalenes, was involved in the process. Absence of the alkylnaphthalene and 1,2‐dinaphthylalkane in the products indicates the smooth electron transfer between (Naph‐Nu)− and Naph‐X. C‐vs. O‐naphthylation is fully addressed in terms of MNDO calculations and acid‐base principle.
Discontinuous behavior of Rayleigh relaxation in supersaturated aqueous NH4H2PO4 solution
Authors: Wu Guo‐Zhen , Huang Yi 
Published: September 2010

AbstractThe algorithm of Rayleigh intensity correlation is employed for the elucidation of relaxation time constants of the aqueous NH4H2PO4 solution with various concentrations. The result shows that there is a discontinuous (abrupt) increases in the relaxation time constant as the super‐saturation state is reached. This quantity, the relaxation time constant, therefore, can be an order parameter. Also discussed is the dependence of the relaxation time constant on the aggregation number n in (H2PO4−)n. This dependence is complicated and may be crucial in understanding the aggregation process in the supersaturation state.
The influence of medium on the stability of coordination compounds 4. The system In(tiron)−‐NaC1O4‐C2H5OHH2O
Authors: Guo Yu‐Hong , Liang Chun‐Yu , Liu Qi‐Tao 
Published: September 2010

AbstractThe stability constants of complex anion In(tiron)− in mixed solvents of ethanol‐water with weight percentages of ethanol being 0,5,15,25,35 and 50 have been measured spectrophotometrically at 293 K, using NaClO4 as supporting electrolyte with ionic strength ranging from 0.1 to 3.3mol·dm−3. The thermodynamic stability constants of In(tiron)− in various mixed solvents have been obtained by a polynomial approximation equation based on Pitzer's theory. As a comparison, the traditional Debye‐Hückel equation has also been used to treat the same data. The results show that this polynomial approximate method is obviously superior to the old one. It was discovered that there is a linear relation between the thermodynamic stability constants of In (tiron)− and the mole fraction of organic component in mixed solvents or the reciprocal of dielectric constants of mixed solvents. The medium effect and the standard free energy of transfer, ΔG°tr, for the coordination reaction: In3+ + tiron4‐ = In(tiron)− have also been discussed.
A new route to prepare the mixed oxo‐ethylidyne‐capped trinuclear tungsten(IV) cluster and the crystal structure of H2Na3[W3O(CCH3)‐(O2CCH3)6(H2O)3][H2W12O40]·13.5H2O
Authors: Xiu Yu‐Fen , Xu Li 
Published: September 2010

AbstractThe synthesis and the structural characterization of the title compound H2Na3[W3O(CCH3)‐(O2CCH3)6(H2O)3][H2W12O40]·13.5H2O are described. It is known that the mixed oxo‐ethylidynecapped tritungsten cluster can be obtained by Zn dust reduction of Na2WO4·2H2O in acetic anhydride. The title compound has been characterized by X‐ray diffraction, UV/VIS and 1H NMR spectra. The tungsten atoms in the cluster cation and anion are in the oxidation states of W(IV) and W(VI) respectively. The crystal is rhombohedral with the space group R32, a = 17.058 (3)Å, c = 49.665 (9)Å, γ=120°, V=12516(9)Å3, Z=6, final R = 0.037 for 2071 reflections with I ≥3σ (I). Both the cluster cation and anion have a C3 symmetry. The important interatomic distances in angstroms for the cluster cation are: W—W, 2.730(2); W—μ3−O, 2.00; W—O (carboxy1), 2.12; W—Ot 2.18 (2).
Kinetics of tautomerization of 1,3,4,7‐tetramethylisoindole
Authors: Capon B. , Ying Bai‐Ning 
Published: September 2010

AbstractThe kinetics of transformation of 1,3,4,7‐tetramethylisoindole (1) to 1,3,4,7‐tetramethyl‐1H−isoindole (2) in water or in deuterium oxide at various pH or pD at 25°C were measured spectrophotometrically. The results indicated that the transformation of 1 to 2 could be promoted by acid and base. From the solvent isotope effects and the fact that the 1‐position of isoindole nucleus is electron‐rich, the mechanism of this transformation is suggested.
The synthesis of perfluoroalkyl‐substituted tetrakisphenylporphyrins
Authors: Huang Wei‐Yuan , Ma Wu‐Ping 
Published: September 2010

AbstractPerfluoroalkyl‐substituted tetrakisphenylporphyrins were synthesized through the coupling reaction of perfluoroalkyl iodides (RFI) with the corresponding bromophenylporphyrin under the Cu‐bronze catalysis.
Studies on sulfinatodehalogenation XXIV. Further study on sodium dithionite‐initiated perfluoroalkylation of electron‐rich aromatics
Authors: Huang Wei‐Yuan , Ma Wu‐Ping 
Published: September 2010

AbstractThe application of the sulfinatodehalogenation reaction system for the perfluoroalkylation of electron‐rich aromatics is further studied. It was shown that perfluoroalkyl iodides reacted with polyhydric phenols, N,N−dialkylanilines, 2,5‐dimethylpyrrole, N−methylpyrrole initiated by Na2S2O4−NaHCO3 gave the corresponding perfluoroalkylated products in moderate to good yields.
Kinetic studies of methanol synthesis from CO2+ H2 over copper based catalysts
Authors: Zhu Yong‐Bao , Xu Song‐Yan , Jiang Xuan‐Zhen 
Published: September 2010

AbstractThe catalytic activity for the synthesis of methanol from carbon dioxide and hydrogen was measured on various binary and ternary catalysts containing copper oxide under a pressure of 10 atm. Among these samples the catalysts, CuO/ZnO/γ‐A1203, demonstrated the highest activity and selectivity to methanol; MnO, as third component, had no promotional effect on the activity of methanolformation. Based on a simple power rate law the apparent activation energy estimation and partial pressure dependence measurement were accomplished over eight catalysts. The activation energies varied from 40 to 120 kJ/mol depending on the composition of catalysts. The rates of methanolformation to be 0.3 — 0.9 order in H2 and about 0.1 — 0.2 order in CO2 were reported.
Synthetic and structural chemistry of nickel(II) complexes containing dithiolato and phosphine ligands I. Preparation and crystal structure of Ni2(PPh3)2(edt)2
Authors: Cao Rong , Huang Zhi‐Ying , Lei Xin‐Jian , Kang Bei‐Sheng , Hong Mao‐Chun , Liu Han‐Qin 
Published: September 2010

AbstractA nickel(II) complex containing both dithiolato and phosphine ligands, Ni2(PPh3)2(edt)2 (edt = SCH2CH2S2‐), has been prepared and characterized by X‐ray diffration. The complex crystallizes in the triclinic system, space group P‐1, with a = 10.693(3), b = 17.457 (6), c = 10.606 (3) Å, α = 102.84(2), β = 96.49 (2), γ = 82.56(3); V = 1906.8 Å3; Dc = 1.439 g·cm−3 for Z = 2; the final conventional R was 0.052 based on 3338 observed reflections. Nickel atoms are linked by two sulfur atoms from two edt ligands with the Ni—Ni distance of 2.893 Å, and each Ni atom is coordinated by one phosphorus atom and three sulfur atoms with a square‐planar geometry, where the average length of Ni—S bond is 2.180 Å and Ni—P bond 2.188 Å. The UV‐Vis and 1H NMR spectra have also been recorded.
Synthesis and crystal structure of a new polynuclear complex with a monomer of (3,4,9,10‐dibenzo‐1,12‐diaza‐5,8‐dioxacyclopentadecane)‐copper(II) (μ‐C1)2 zinc(II) chloride
Authors: Gou Shao‐Hua , Xu Zheng , You Xiao‐Zeng , Zheng Pei‐Ju , Dong Jun 
Published: September 2010

AbstractA polynuclear complex containing a monomer of Cu(II)‐Zn(II) heterobinuclear unit was synthesized and characterized by IR spectra and magnetic moment. The crystal and molecular structure of the complex, CuZnC19H24Cl4N2O2, was determined by X‐ray diffraction, it crystallized in monoclinic, P21/m, α = 8.812 (2), b = 15.972(3), c = 8.831(1) Å, β = 114.33(1)°, V = 1132.4Å3, Z = 2, De = 1.710 g/ cm3,γ(MoKα) =0.71073 å, μ = 25.227 cm−1, R = 0.051. Rw = 0.063 for 1130 observed reflections with I>3α(1). The coordinated octahedra of Cu(II) and tetrahedra of Zn(II) via bridging CI atoms form a single chain polynuclear complex. The Cu, Zn and bridging Cl atoms are located on the crystallographic symmetry plane m which is perpendicular to 2N and 2O donor plane.
Effects of additives on the aggregation of surfactants: Binding domination
Authors: Lei Xue‐Gong 
Published: September 2010

AbstractThe effects of electrolytes, alcohols, and urea on the aggregation of SDS, CTAB, and Triton X‐100 at 25°C have been investigated by fluorescence probing of pyrene. Both electrolytes and alcohols reduce the critical micelle concentration (CMC) of the ionic surfactants, while the effect of the former is more pronounced. It is shown that the effects of electrolytes mainly depend on the concentrations and especially the valence of the opposite charge ions, and only slightly depend on the same charge ions in respect of ion aggregate of micelle. The logarithm of CMC is not linearly correlated with the concentrations of the counter ion or the electrolytes. The results are rationalized in terms of Hartley's model. Propanol increases the CMC of TX‐100, while electrolytes and urea do not. In all the three kinds of surfactant micelles the excitation spectrum of pyrene slightly red‐shifts (ca. 4 nm) from that in water, but is not affected by the additives. The micropolarity of the environment in which pyrene molecule resides in SDS micelle decreases with the increase of the concentrations of electrolytes. This is not the case when alcohols and urea were added to SDS or to TX‐100. It is suggested that the addition of electrolytes would result in more orderly orientation of SDS molecules. It is the binding strength of the counter ions that dominates the effects of additives on the aggregation of surfactants.
The CO2 laser‐induced radical‐chain reactions between CH3CF2H and chlorine‐atom donors CF2ClCFCl2, CF3CCl3 CFCl3 or CF2Cl2
Authors: Li Fang‐Lin , Shi Ji‐Liang , Bi Qi‐Xiu , Gu Jia‐Liang , Jiang Xi‐Kui 
Published: September 2010

AbstractThe CO2 laser induced room temperature reactions of CH3CF2H or another protium‐donor CH3CHClCH3 with chlorine‐atom donors (Z—Cl) CFCl2CF2Cl, CF2CCl3, CFCl3 or CF2Cl2, have been investigated. Some of these reactions can yield two important monomers (CF2 = CH2 and CF2 = CFCl) for fluoropolymers simultaneously. The yield dependence of these two alkenes on experimental conditions has been studied. A laser‐initiated chain process is supported by identification of Z—H intermediates in these reactions.
The reaction of perfluoroalkanesulfonyl halides VIII. A mild method for introducing BrCF2 group to organic molecules
Authors: Huang Wei‐Yuan , Zhang Han‐Zhong 
Published: September 2010

AbstractBrCF2SO2Br, prepared from sulfinatodehalogenation of CF2Br2 followed by bromination of the intermediate BrCF2SO2Na, was shown to be a mild and efficient bromodifluoromethylating agent.
The structure of adducts of benzaldoxime and m‐chlorobenzaldoxime dehydrodimers with styrene
Authors: Hu Hong‐Wen , Wei Xu‐Dong , Li Cun , Sun Hong‐Zhe , Yao Yi‐Ming , Zhou Zhong‐Yuan , Yu Kai‐Bei 
Published: September 2010

AbstractThe reaction of m‐chlorobenzaldoxime dehydrodimer with styrene gives two 1:1 adducts. The main product 7 is a bisnitrone. The minor product 8 has been shown by X‐ray diffraction analysis to possess the structure: ArCH(NO)CH2CH (Ph)ONCHAr. The two CN bonds are all in Z configuration. The structure of the adducts from benzaldoxime dehydrodimer and styrene is also assigned.
Calculation of ligand‐field and Stark sub‐levels in laser crystals Nd3+ : KY(WO4)2 and Nd3+ : KGd(WO4)2
Authors: Wang Jian‐Jun , You Xiao‐Zeng , Dai An‐Bang 
Published: September 2010

AbstractThe parameters of ligand field of laser crystal Na3+ : KY(WO4)2 and Nd3+ : KGd(WO4)2 are obtained by a scheme which involved intermediate coupling and ligand field interaction. The calculated Stark‐levels are in good agreement with the experimental values.
Poly‐N‐benzylaniline prepared in perchloric acid—a new soluble semiconducting polymer
Authors: Li Zhuang , Dong Shao‐Jun 
Published: September 2010

AbstractChemical or electrochemical oxidation of N‐benzylaniline in perchloric acid solution yields a highly colored polymer—poly‐N‐benzylaniline (PBAn). The polymer has good solubility in a number of organic solvents in either acid or base form. At room temperature, conductivity measurements on pressed pellets of the acid form PBAn give a conductivity of 9.3 × 10−6 S·cm−1. The soluble polymer was analyzed using a variety of common experimental techniques including UV‐vis, IR, NMR, ESR spectroscopy, elemental analysis and electrochemical analysis. All experimental results showed that PBAn has a structure similar to polyaniline with the elimination of some benzyl groups.
Synthesis and spectroscopic characterization of cobalt porphyrins and their catalytic activity towards dioxygen reduction
Authors: Guilard Roger , Barbe Jean‐Michel , Dong Shao‐Jun , Qiu Qing‐Sheng 
Published: September 2010

AbstractThe synthesis and spectroscopic characterization of cobalt(II) 5‐(4‐pyridyl)‐10, 15, 20‐triphenylporphyrin, cobalt(II) 5‐(4‐N‐hexadecylpyridiniumyl)‐10, 15, 20‐triphenylporphyrin bromide and cobalt(II) 5‐(2‐aminophenyl)‐10, 15, 20‐triphenyl‐porphyrin are reported. The corresponding copper and vanadyl derivatives ((TriP)Cu, [(hTriP)Cu]+Br− and [(hTriP)VO]+Br−) were also studied. Each metalloporphyrin was characterized by UV‐visible, ESR and 1H NMR spectroscopy. These metalloporphyrins can be firmly adsorbed on the glassy carbon (GC) surface. The catalytic reduction of dioxygen at GC electrodes modified by these catalysts was studied by cyclic voltammetry (CV). The kinetic process of dioxygen reduction at the cobalt porphyrin‐modified electrodes was studied with a rotating ring disk electrode.
Dehydrogenation activities of highly dispersed transition metal oxides on NaY zeolite
Authors: Gao Zi , Cui Jun , Pu Shu‐Bin 
Published: September 2010

AbstractHighly dispersed α‐Fe2O3/NaY, NiO/NaY, and CuO/NaY catalyst systems were prepared by impregnation method. Dispersion thresholds of the transition metal oxides on NaY zeolite were determined by XRD phase analysis. The dispersion capacities of the transition metal oxides on NaY zeolite are much lower than that estimated on the basis of a closed packed monolayer in the micro pores. The catalytic activity and selectivity of the highly dispersed oxide catalyst systems for ethylbenzene and cyclohexane dehydrogenation reactions were reported.
Adsorption of phenylalanine from aqueous solution onto active carbon and silica gel
Authors: Zhao Zhen‐Guo 
Published: September 2010

AbstractThe adsorption isotherms of phenylalanine from aqueous solution on active carbon and silica gel at varying pH, and the influence of inorganic salt upon the adsorption have been studied (at 25°C). The adsorption amount of phenylalanine on the silica gel is very low due to the strong adsorption of water by silica gel. The results on the active carbon show: (1) The adsorption is found to be pH‐dependent, within pH 4.1—5.1 it increases with pH, within pH 5.1—11.8 it decreases with pH, at pH 5.1 the adsorption reaches its maximum; (2) The phenylalanine is adsorbed mainly in the form of zwitterion; (3) A certain amount of cations and anions of phenylalanine are also adsorbed with van der Waals interaction; (4) After adding NaCl, the adsorption of phenylalanine increases markedly.
Stereochemical effects in mass spectrometry XI. Negative ion fast atom bombardment mass spectrometry of saccharides and glycosides using phenylboronic acid as reagent
Authors: Li Hong , Yang Hou‐Jun , Chen Shao‐Nong , Chen Yao‐Zu 
Published: September 2010

AbstractThe negative ion fast atom bombardment (NIFAB) mass spectra of mono‐, di‐saccharides and glycosides using phenylboronic acid (PBA) as reagent have been studied. In the ion source, PBA reacts stereospecifically with the molecules containing cis‐vicinal glycols to form characteristic ions, from which the stereo‐isomers of saccharides can be definitely distinguished. Disaccharides and glycosides with β‐glycosidic linkage seem to be unfavorabale to react with PBA, therefore, by comparison of the abundances of the characteristic ions, the configuration of the glycosidic linkage in these compounds may be inferred.
Characterization of various surface Co‐sites on reduced Co–Mo/A12O3 and Ru–Co–Mo/A12O3 catalysts using IR and MS spectroscopies
Authors: Xiao Feng‐Shou , Xin Qin , Guo Xie‐Xian 
Published: September 2010

AbstractAn investigation on adsorption of NO on reduced CoMo/A12O3 and Ru‐Co‐Mo/Al2O3 catalysts has been performed using FT‐IR and MS spectroscopies. IR spectra of NO adsorption showed two bands at 1895 and 1800 cm−1, and NO‐TPD profiles gave rise to several peaks at 353, 423 and 473 K, which are assigned to various Co‐sites on the surface. Compared with Co‐Mo/A12O3, the adsorption rate, binding energy, and amount of NO adsorbed on Ru‐Co‐Mo/A12O2 are very high.
Syntheses of (C5H9C5H4)2LnCl(THF)n (Ln = Nd, Sm, Er, Yb) and crystal structure of [(C5H9C5H4)2‐LnCl(THF)n]2(Ln = Sm, n = 1; Ln = Er, n = 0)
Authors: Jin Ji‐Zhu , Jin Zhong‐Sheng , Wei Ge‐Cheng , Chen Wen‐Qi 
Published: September 2010

AbstractReactions of lanthanoid trichlorides with sodium cyclopentylcyclopentadienyl in THF afford bis(cyclopentylcyclopentadienyl)lanthanoid chloride complexes (C2H9C5H4)2 LnCl(THF)n (Ln = Nd, Sm, n = 1; Ln = Er, Yb, n = 0). The compound [Cp'2SmCl(THF)]2 (2) (Cp' = cyclopentylcyclopentadienyl) crystallizes from mixed solvent of hexane and THF in monoclinic space group P21/c with a = 11.583 (3), b = 23.019(6), c = 8.227 (2) Å, β = 90.26 (2)°, V= 2194 (1)Å2, Dc = 1.59 g / cm3, μ = 28.6 cm−1, F(000) = 1060, Z = 2 (dimers). Its crystal molecule is a dimer with a crystallographic symmetry center. The central metal atom Sm is coordinated to two Cp' rings, two bridging chlorine atoms and one THF forming a distorted trigonal bipyramid. The crystal of [Cp'2ErCl]3 (3) belongs to the triclinic space group P1 with a = 11.264 (2), b = 13.296(5), c = 14.296(6)Å, α = 96.99 (3), β = 112.47(2), γ = 102.78(2)°, V = 1865(1)Å2, De = 1.67 g / cm2, μ = 48.0 cm−1, F(000) = 924, Z = 2 (dimers). The molecule is a dimer consisting of two Cp'2 ErCl species bridged by two Cl atoms. The central metal atom Er is coordinated to two Cp' rings and two bridging chlorine atoms forming a pseudotetrahedron. All these complexes are soluble in THF, DME, Et2O, toluene and hexane.
Study on the cocolouration effect in the β‐complex formation reactions of rare earths with p‐chloro‐chlorophosphonazo (CPApC)
Authors: Xu Zhong‐Jun , Hsu Chung‐Gin , Zhang Lan , Pan Jiao‐Mai 
Published: September 2010

AbstractTerbium‐ and yttrium‐group rare earths form β‐complexes with CPApC in acidic medium. The sensitivities for determination of these rare earths by this reaction depend on their ionic radii. Cerium‐ or terbium‐group rare earth in the presence of yttrium‐group element produces the cocolouration effect which remarkably sensitizes the reaction. Yb‐CPApC‐Eu complex has a molar composition of 1:4:2 and gives a molar absorptivity of 2.02×103 L·mol−1·cm−1 at 746 nm for Eu. It is found that the closer the lengths of ionic radii of the rare earths are, the greater will be the cocolouration effect.
Investigation on chiral capillary columns and their application in separation of enantiomers
Authors: Zhou Liang‐Mo , Lou Xian‐Wen , Liu You‐Qin , Wang Qing‐Hai , Zhu Dao‐Qian 
Published: September 2010

AbstractSix chiral diamide stationary phases (CSPs), namely N‐(3‐carbobenzoxypropionyl)‐L‐Val‐tert‐butylamide (CSP‐1), N‐undecenoyl‐L‐Val‐S‐α‐phenylethylamide (CSP‐2), N‐undecenoyl‐L‐Val‐R‐α‐phenylethylamide (CSP‐3), OV‐225‐L‐Val‐tert‐butylamide (CSP‐4), XE‐60‐L‐Val‐tert‐butylamide (CSP‐5) and polycyanoethyl vinyl siloxane‐L‐Val‐tert‐butylamide (CSP‐6), were investigated and CSP‐6 was crosslinked within narrow bore (70 μm) fused silica capillary columns. The separation of amino acid enantiomers on this narrow bore column by gas chromatography (GC) is illustrated.
Asymmetric syntheses of α‐amino acids via double chiral induction in alkylation of the ketimine derived from 2‐hydroxypinan‐3‐one and menthyl glycinate
Authors: Mi Ai‐Qiao , Ma Zeng‐Xin , Wu Lan‐Jun , Jiang Yao‐Zhong 
Published: September 2010

AbstractAsymmetric syntheses of (S)‐α‐amino acids in 28–98% optical yields via double chiral induction in alkylations of ketimine 1 derived from (+)‐2‐hydroxypinan‐3‐one and (‐)‐menthyl glycinate which is a chiral match pair have been studied. The factors controlling the diastereoselectivities in alkylation reactions of the ketimine, the properties of alkylating agents and various alkylation conditions are examined.
Addition of polyfluoroalkyl halides to 1‐octene initiated by dichlorobis(π‐cyclopentadienyl)‐titanium and iron
Authors: Hu Chang‐Ming , Qiu Yao‐Ling 
Published: September 2010

AbstractAddition of various polyfluoroalkyl halides including 1,2‐dihalopolyfluoroalkanes to 1‐octene is effected by using a catalytic amount of Cp2TiCl3(IV) and iron powder to give 1:1 adducts in excellent yields. The reaction is performed in EtOH or THF. A Cp2TiCl(III) mediated radical mechanism is proposed. Radical reactivity of polyfluoroalkanes toward 1‐octene was found to be ‐CF2I>‐CF2Br>‐CF2CCl2.