bluuebunny/crossref_metadata_2025_split huggingface dataset:
A generalized mathematical model for non‐catalytic gas‐solid reactions
Authors: Zi‐Feng Yan , Jie‐Qing Lu , Max G. Q. Lu 
Published: September 2010

AbstractBased on a general classification and characteristic comparison of the existing models, a new model for non‐catalytic gas‐solid reactions is proposed and a general formulation for the model in terms of the solid conversion, X, is presented in mis paper. The model, referred to the generalized model, is demonstrated to be applicable to any solid reactant of general structure ranging from highly porous to nonporous materials. It is shown that the generalized model incorporates the grain and pore structure for a solid pellet and can be reduced to the grain and random pore models as extreme cases.
Preconcentration and separation of trace Pd(II) and Pt(IV) with silica, gel bonded by aminopropyl‐benzoylazo‐4‐(2‐pyridylazo)‐resorcinol
Authors: Feng Li Lhj , Ke‐An  , Wen Chen , Yan‐Sheng Wu , Tuan‐Li Yao , Shen‐Yang Tong 
Published: September 2010

AbstractThis paper reports a simple and highly selective method for preconcentrating and separating of trace Pd(II) and Pt(IV) with silica gel bonded by aminopropyl‐benzoylazo‐4‐(2‐pyridylazo)‐resorcinol (ABPR·SG). ABPR·SG is stable in solution from 6 mol/L HCl to pH 7.0 and in common organic solvents. The maximum adsorptive capacity of Pd(II) on ABPRSG is 362 μmol/g. After preconcentrating and separation by using ABPR·SG column, Pd(II) and Pt(IV) of μg/L level in artificial water samples can be measured reliably by common spectrophotometer. The maximum concentration factors of Pd(II) and Pt(IV) on ABPR·SG column are 143 and 125 respectively. The chromatographic column packed with ABPR·SG can be reused. The method is simple and efficient.
Studies on the effect of surfactants on the extraction rate by laser thermal lens spectrometry
Authors: Hong‐Tao Yan , Xin Tian , Yong‐Feng Wei 
Published: September 2010

AbstractThe effect of different kinds of surfactants on the extraction process of Nile Blue‐I was investigated by laser thermal lens spectrometry. It was shown that the surfactants could accelerate or decelerate the extraction rate by varying the extractive's solubility and the intrafacial tension of the extraction solution. The higher the concentration of surfactants was, the more obvious the effect.
Epoxidation of allyl chloride with H2O2 on Ti‐ZSM‐5 prepared by the isomorphous substitution
Authors: Cheng‐Hua Xu , Shao‐Jie Lü , Gui‐Ying Deng , Fa‐Li Qiu 
Published: September 2010

AbstractThe epoxidation of allyl chloride with H2O2 on Ti‐ZSM‐5 prepared by isomorphous substitution of HZSM‐5 with TiCl4 gas was studied. The results show that Ti‐ZSM‐5 has a high catalytic efficiency for the epoxidation of allyl chloride. The H2O2 utilization reaches 99.50% when the allyl chloride/H2O2 molar ratio is > 1. The effect of solvent species, catalyst concentration, H2O2 and allyl chloride concentration and reaction temperature on the epoxidation was investigated simultaneously. It is found that methanol is the best solvent for the reaction. The reaction rate equation with v = k[Cat.][H2O2]1/2‐[ C3H5a] and the apparent activation energy with Ea= 63.462 kJ/mol are obtained according to the kinetics study.
Effect of solvent on the free energy of activation of SN2 reaction between phenacyl bromide and amines
Authors: Asadollah Nasehzadeh , Abbas Chahardoli 
Published: September 2010

AbstractThe kinetics of SN2 reaction between phenacyl bromide and various amines in 12 different solvents were studied. Solvent effects on the rate of this reaction and free energy of activation, ΔG#, were interpreted by applying the Abraham‐Kamlet‐Taft (AKT) equation. The solvent polarity (π1*), solvent hydrogen‐bond basicity (β1) and Hildebrand cohesive density energy (δ2H) are those parameters which increase the rate constant and decrease ΔG#, while solvent hydrogen‐bond acidity (α1) will have the compensatory effect. A comparison among obtained values of second rate constants, k2 for different amines in a given solvent indicates that the amine reactivities are highly dependent on their structures. The consequent decrease of the rate constant for different amines in any given solvent was found to be: primary > secondary > tertiary. This order results from steric effects of amines.
A new alkaloid and arbutin from the whole plant of Huperzia serrata
Authors: Wen‐Yun Gao , Bao‐De Wang , Yi‐Ming Li , Shan‐Hao Jiang , Da‐Yuan Zhu 
Published: September 2010

AbstractA new Lycopodium alkaloid together with a phenolic glycoside—arbutin, were isolated from the whole plant of Huperzia serrata. The new compound was assigned the trivial name of huperzine I. The structures of these two compounds were determined on the basis of spectral evidence.
Hydrophobically modified polyelectrolytes III. Reactivity ratio determination of FX14/AA, LA/AA and SA/AA
Authors: Dong‐Qing Zhuang , Li‐Ping Shi , Yi‐Hua Yu , Yun‐Xiang Zhang 
Published: September 2010

AbstractThe reactivity ratios of three hydrophobic monomers, FX14, LA and SA, to hydrophilic monomer, acrylic acid (AA), were determined. For the fluorocarbon containing hydrophobic monomer FX14, elemental analysis was adopted to obtain the relative content of FX14 to AA. For two hydrocarbon monomers, 13C NMR was used. FR, KT linear method and EVM nonlinear method were applied in calculating reactivity ratios. It is found that the reactivity of LA and SA is lower than that of AA, for solution polymerization in cyclohexane. Whereas FX14 is more reactive than AA in benzene. Finally, the distribution of small amounts of these hydrophobic monomers along the polymeric chain is discussed and a random sequence is confirmed
Synthesis of C2 oxygenated compounds from syngas in supercritical cyclohexane
Authors: Xiu‐Zhi Wang , Wei Wei , Jie Chang , Xiao‐Ping Chen , Jie Ren , Yu‐Han Sun , Bing Zhong 
Published: September 2010

AbstractCatalytic synthesis of C2 oxygenated compounds from syngas in supercritical cyclohexane was reported in this paper. The effect of the molar ratio of media to feed on the conversion and selectivity was mainly discussed. The results showed that the selectivity of C2 oxygenated compounds in supercritical cyclo‐hexane was greatly improved, and the by‐products of acetic acid, acetic ester and alkanes were efficiency suppressed. Although the CO conversion was slightly declined, the space‐time yield of C2 oxygenated compounds basically kept the constant at high media/feed ratio.
Chemically induced dynamic electron polarization investigation of the triplet‐radical system in the solution of the triplet quencher
Authors: Zhang Xian‐Yi , Xu Xin‐Sheng , Cui Zhi‐Feng , Lu Tong‐Xing 
Published: September 2010

AbstractThe chemically induced dynamic electron polarization (CIDEP) of the triplet molecule/triplet quencher/2, 2, 6, 6‐tetramethyl‐1‐piperidinyloxyl (TEMPO) systems were measured using the high time‐resolved ESR spectrometer. The competition between the radical‐triplet pair mechanism (RTPM) and triplet mechanism (TM) or radical pair mechanism (KIM) polarization in the solution of the triplet quencher was investigated, and the relationships between reaction rate of the radical‐triplet pair and quenching rate of triplet was deduced.
Polymeric bilayer modified microelectrodes for in‐vivo determination of neurotransmitter dopamine
Authors: Yang Li‐Ju , Peng Tu‐Zbi , Catherine Yang F. 
Published: September 2010

AbstractA composite polymer carbon fiber electrode modified with Nafion and cellulose acetate is described. The modified electrode discriminates against both anionic reactants and big molecular organic compounds. The bilayer configuration is prepared in two steps. First, the carbon fiber electrode is coated with Nation, men followed by air evaporation of the solvent, me electrode is dipped in a cellulose acetate solution and hydrolyzed for a selected time. The permeability of the film is explored by use of rotating disk electrode measurements. Parameters affecting the film electrochemistry are investigated. The resulting electrodes show high selectivity and stability in body fluids. For in‐vivo voltammetry, the composite polymer modified electrode has been used for detection of me oxidative current of neurotransmitter dopamine in rat brain, while it inhabits the oxidation of an°C neurotransmitter metabolites and some electroactive compounds.
Coordination chemistry of organometallic polydentate ligand Reactive chemistry of the tridentate ligand trans‐Fe(Ph2PQu‐P)2‐(CO)3 [PhzPQu=2‐diphenyl‐phosphino‐4‐methylquinoline] and molecular structure of [Fe(CO)3(μ‐Ph2PQu)2HgI]+ [HgI3]
Authors: Xu Feng‐Bo , Sun Li‐Juan , Xuan Zhen‐Ai , Zhang Wei‐Dong , Cheng Hui , Zhang Zheng‐Zhi 
Published: September 2010

AbstractReaction of a new type of bidentate ligand PhPQu [PhPQu = 2‐diphenylphosphino‐4‐methylquinoline] with Fe(CO)5 in butanol gave trans‐Fe(FpPQu‐P)(CO)3 (1). Compound 1, which can act as a neutral tridentate organometallic ligand, was reacted with I B, II B metal compounds and a rhodium complex to give six binuclear complexes with FeM bonds, Fe(CO)3 (μ‐Ph2PQu)MXn (2–7) [M= Zn(II), Cd(II), Hg(II), Cu(I), Ag(I), Rh(I)], and an ion‐pair complex [Fe(CO)3 (μ‐Ph2PQu)2HgI][HgI3]− (8). The structure of 8 was determined by X‐ray crystallography. Complex 8 crystallizes in the space group P‐1 with a = 1.0758(3), b = 1.6210(4), c=1.7155(4)nm; a=75.60(2), β=71.81(2), γ=81.78(2)° and Z = 2 and its structure was refined to give agreement factors of R=0.050 and Rw = 0.057. The Fe‐Hg bond distance is 0.2536nm.
Template synthesis and cocatalytic behavior of phosphorus donor containing trans‐Fe(0) metallacrown ethers
Authors: Xu Feng‐Bo , Zhang Li‐Fang , Sun Li‐Juan , Xuan Zhen‐Ai , Zhang Zheng‐Zhi , Zhao Wei‐Jun 
Published: September 2010

AbstractSame new phosphorus donors containing trans‐Fe(0) metallacrown ethers were obtained by template synthesis. The co‐catalytic properties of these complexes and the X‐ray diffraction structure of complex 1 were discussed.
Synthesis, characterization and catalytic applications of tridentate Schiff base derivatives of bis and mono(cyclopentadienyl)‐lanthanocene complexes
Authors: Yousaf Muhammad , Liu Qian‐Cai , Huang Ji‐Ling , Qian Yan‐Long 
Published: September 2010

AbstractSeven kinds of lanthanocene complexes were prepared by the reaction of tridentate Schiff base | N‐(2‐methoxyphenyl)salicylideneamine with tris(cyclopentadienyl) lanthanide tetrahydrofuranate or bis (cyclopentadienyl) lanthanide chloride tetrahydrofuranate in THF. All the complexes were characterized by MS, EA and IR respectively. The structure of |Cp2LnC14U13NO2) Ln = Sm, Dy, Y, Er| (1–4) was further confirmed by X‐ray determination of Cp2Sm(C14H13NO2) (1) which indicates that the complex is monomeric in which central metal is coordinatively saturated by two cyclopentadienyl rings, two oxygens and one nitrogen of the ligand. The isomerization of 1,5‐hexadiene explains that complexes (1–4) isomerize this monomer into a mixture of 1,4‐hexadiene, 2,4‐hexadiene, 1,3‐hexadiene, methylenecyclopentane and methyl–cyclopentene. Similarity complexes |CpLn(a) C14 H13NO2) (THF) (Ln=Sm, Dy, Y, Er)| (5–7) polymerize methyl‐methacrylate (MMA) to give polyMMA (PMMA) in 51.8% yield and high molecular weight (274 × 103), which shows narrow molecular weight distributions and partially syndiotactic.
Synthesis and structural characterization of a novel dimolybdenum(I) compound with mixed‐tribridging ligands: [Bu4N][Mo2(μ‐SPh)2(μ‐Cl(CO6]
Authors: Pan Guo‐Hua , Zhuag Bo‐Tao , He Ling‐Jie , Chen Jiu‐Tong , Lu Jia‐Xi 
Published: September 2010

AbstractA novel mixed‐tribridged dimolybdenum(I) compound [Bn4N][Mo2(μ‐SPh)2(μ‐Cl)(CO)6] (1) has been synthesized from the reaction of Mo2(CO)3(SPh)2 with BU4NCl. Compound 1 was characterized by IR, UV‐Vis and 1H, 13C, 95Mo NMR spectroscopic analyses. The electrochemical behavior was measured by cyclic voltammetry, indicating a quasi‐reversible two‐electron transfer in one step. The crystal structure determined by X‐ray crystallography shows that 1 contains a [Mo2(μ‐S)2(μ‐Cl)]− core with a planar Mo2S2unit and a Cl bridge. The MoMo distance is 0.28709(7) nm, and the Mo‐Cl‐Mo angle is 66.44(4)°. A newface‐sharing bioctahedral structure is discussed.
Oxidation of N‐benzyl groups
Authors: Qiu Wen‐Ge , Chen Shu‐Sen , Yu Yong‐Zhong 
Published: September 2010

AbstractThe additive reactivity of 2,6,8,12‐tetraacetyl‐4, 10‐dibenzyl‐2,4,6,8,10,12‐hexazatetracyclo [5.5.0.05.9. 03.11] dodecane (3) in several conditions was studied. It was found that the N‐benzyl groups in compound 3 could be oxidized to benzoyl groups by Cr(VI) reagents, and could be removed by cerium ammonium nitrate (CAN), meanwhile nitroamine products were given.
Polymerization of MMA catalyzed by different novel mixed ligand lanthanocene {(Cp) (Cl) LnSchiff‐base (THF)}, (COT)‐Ln(methoxyethylindenyl) (THF)/Al(i‐Bu)3 systems
Authors: Yousaf Muhammad , Huang Ji‐Uag , Feng Zuo‐Feng , Qian Yan‐Long , Sun Jun‐Quan , Pan Zhi‐Da 
Published: September 2010

AbstractThis article deals that the rare earth metal complexes along with Al (i‐Bu)3 can catalyze the polymerization of methyl‐methacrylate (MMA) into high molecular weight poly(MMA) along with narrow molecular weight distributions (MWD). A typical example was mentioned in the case of {Cp(Cl) Sm‐Schiff‐base(THF)} which expresses maximum (conv. % = 55.46 and Mn = 354 × 103) efficiency along with narrow MWD (Mw/Mn < 2) at 60°C. The resulting polymer was partially syndiotactic (>60%). The effect of the catalyst, temperature, catalyst/MMA molar ratio, catalyst/Al(i‐Bu)3 molar ratio on the polymerization of MMA at 60°C were also investigated.
Synthesis, crystal structures and spectral properties of cobalt (II) complexes: [ Col (N3) ] · ClO4 and CoL (N3) 2 [L = tris( (3,5‐dimethylpyrazol‐1‐yl) methyl)amine]
Authors: Zhang Zhi‐Hui , Yang Hai‐Long , Ma Zhi‐Hong , Qi Ai‐Di 
Published: September 2010

AbstractTwo monomeric cobalt(II) complexes, [CoL(N3)]ClO4 (1) and CoL(N3)2 (2), where L is tris((3,5‐dimethylpyrazol‐yl) methyl) amine, were synthesized and their crystal structures were determined by X‐ray diffraction technique. Complex 1 is five coordinated with one azide nitrogen atom and four nitrogen atoms of the tris((3,5‐dimethyipyrazol‐1‐yl)‐methyl) amine ligand, and the metal center is in distorted trigonal bipyramidal environment. Complex 2 is six coordinated distorted octahedron with the two azide nitrogen atoms and four nitrogen donors of the tris((3,5‐dimethylpyrazol‐l‐yl)‐methyl) amine ligand. The solution behaviors of the title complexes have been further investigated by UV‐Vis, and 1H NMR analysis. It is found that the formation of 1 and 2 depends on the molar ratio of the azide ion to metal salt and ligand. Complex 1 attached with one aside group is more stable and easy to generate than complex 2 incorporated with two azide groups, and the reasons were well discussed.
Metal compound‐mediated hydrolytic cleavage of oxidized insulin B chain: Regioselectivity and influence of peptide secondary structure
Authors: Luo Xue‐Mei , He Wd‐Jiang , Zhang Yu , Guo Zi‐Jian , Zhu Long‐Gen 
Published: September 2010

AbstractThe interaction of oxidized insulin B chain (B) with cis‐[Pd(en)Cl2] (en=ethylenediamine), cis‐[Pd‐(dtco‐3‐OH)Cl2] (dtco‐3‐OH= dithiacyclooctan‐3‐ol) and CuCl2 was studied by electrospray mass spectrometry. It is discovered that the binding of Pd(II) complexes and the sites of cleavage are highly dependent on the secondary structure and local environment of B. The hydrolytic cleavage of denatured B by Pd(II) complexes was monitored by HPLC. The reaction is regioselective and follows first order kinetics with half‐life of 4.8 days at 40oC. Two amide bonds, i. e. at Leu6‐Cys7 and at Gly8‐Ser9, which are dose to the two potential Pd(II) binding sites His5 and His10, are selectively cleaved. In the case of Cu(II) ion as promoter, only one cleavage site was observed which is located at Gly8‐Ser9 bond. These results provide improved understanding on the design of artificial metallopeptidase.
Study on surface acid‐base property of carboxylic acid‐terminated self‐assembled monolayers by cyclic voltammetry and electrochemical impedance spectroscopy
Authors: Luo Ii‐Qiang , Cheng Zhi‐Liang , Yang Xiu‐Rong , Wang Er‐Kang 
Published: September 2010

AbstractCyclic voltammetry and electrochemical impedance spectroscopy were used to study the surface acid‐base property of carboxylic acid‐terminated self‐assembled monolayers (SAMs). A carboxylic acid‐terminated thiol, such as thioctic acid (l,2‐dithiolane‐3‐pentanoic acid), was self‐assembled on gold electrodes. Electron transfer between the bulk solution and the SAM modified electrode was studied at different pH using Fe(CN)63− as a probe. The surface pKa. of thioctic acid was determined by cyclic voltammetry and electrochemical impedance spectroscopy to be 5.6 ± 0.1 and 5.8 ± 0.1, respectively. The method is compared with other methods of monolayer pKa measurement.
Dysamide U, a new trichlorinated diketopiperazine from the sponge Dysidea sp
Authors: Fu Xiong , Su Jing‐Yu , Zeng Long‐Mei 
Published: September 2010

AbstractDysamide U, a new trichlorinated diketopiperazine (1) along with seven known ones (2–8) were isolated from the sponge of Dysidea sp. collected from the Pacific ocean. The structure of dysamide U (l) was elucidated by high resolution FABMS and 1H NMR data including COSY and RCT‐COSY.
Rearrangement reaction of the hydroxyl group of α‐hydroxyalkyltriphenyl phosphonium bromides
Authors: He Mei‐Yu , Yuan Gu , He Xiao‐Ran 
Published: September 2010

AbstractNo molecular ion peak from the Electron Impact Ionization of eight ω‐hydroxyalkyltriphenyl phosphonium bromides (Ph3P+(CH2) OHBr, n=2–6, 8–10) can be found, except a part of some relative powerful fragment ions can be observed only. Each compound forms a very characteristic ion (O = PPh3 ‐ 1)+ at m/z 277 through hydroxyl rearrangement reaction. The intensity of this ion is closely related with the size of the carbon chain of hydroxyalkyl and with temperature of ion source and temperature of sample probe. The above rearrangement reaction and the reaction to form ion at m/z 262 take place simultaneously, thus leading to strong competition.At n = 2, km at m/z 277 is the most powerful and becomes continuously the base peak. At n = 3 and n = 4, the intensity of ion at m/z 262 reaches the maximum, and is always the base peak, and the relative abundance of m/z 277 is only around 2% At n = 5, 6, 8, 9, 10, m/z 277 becomes base peak when the temperature of probe is below 300°. But, when the temperature increases from 300°C to 35oC, m/z 262 suddenly becomes the base peak, which is not in direct proportional relation with the size of carbon chain. It is proved by MIKES and accurate mass mat ion at m/z 277 produces a fragment ion (O = PPh2 ‐ 2) + at m/z 199 with the loss of the neutral benzene molecule.
Synthesis and mesomorphic properties of some ferroelectric liquid crystals of lactate
Authors: Li Heng‐Feng , Yang Yong‐Gang , Wen Jian‐Xun 
Published: September 2010

AbstractA semiperfluorinated chain has been introduced into three series of lactate‐based molecules, and their mesomorphic properties have been studied by DSC and optical polarized microscope. An abnormal phenomenon has been found that the introduction of a triple bond in the core of the molecule, which lengthened the molecule, gave rise to a decrease in the thermal stability of chiral smectic C phase and smectic A phase. 2, 3‐Difluoro substituents of the phenylenic structure hinder the formation of the chiral smectic C phase because of the steric effect.
Synthesis and crystal structure of chain [Cu2I2(PPh3)2(C4H5N3)]∞
Authors: Jin Qiong‐Hua , Lu Xiao‐Ming , Zhu Hui‐Ju , Ji Xian‐Ping 
Published: September 2010

AbstractThe chain [Cu2I2 (PPh3 )2 (C4H5N3)]∞ has been synthesized and characterized by X‐ray crystallography. It crystallizes in the triclinic system, space group P1, with a =0.9985(2) nm, b = 1.0998(2) mn, c = 1.5174(2) nm, a = 87.89(1)°, β=76.73(1)°, γ = 77.77(1)°, V=1.5849(5) nm3, Z = 2, Dc = 2.095g/cm3. [Cu2I2(PPh3)2(C4H5N3)]∞ has a dimmer unit [Cu2I2(PPh3)2(C4H5N3)]. The two N atoms of the phenyl ring of 2‐aminopyrimidine bridge two [CuI(PPh3)]2 units, by which a one‐dimensional chain is constructed. The van der Waals force makes the molecules arrange in the three‐dimensional space.
Bite Angle Effects in Hydroformylation Catalysis
Authors: van Leeuwen Piet W. N. M. , Kamer Paul C. J. , van Der Veen Lars A. , Reek Joost N. H. 
Published: September 2010

AbstractRecent advances in rhodium catalyzed hydroformylation using xanthene‐based ligands will be reviewed. The calculated natural bite angles of the ligands discussed are in the range 100–123°. While the general trend is clear—higher 1: b ratios at wider angles, small changes in the bite angle do not exhibit a regular effect on the selectivity of the reaction. The same is true for the rate of CO dissociation; the larger the rate of the CO dissociation, the larger the rate of hydroformylation, but for small changes the effects do not comply with this rule.
Development of a New Combinatorial Approach to Multifunctional Catalysts: Metal Silsesquioxanes as Precursors to Microporous Metallosilicates
Authors: Maxim Nicolae , Abbenhuis Hendrikus C. L. , Magusin Peter C. M. M. , van Santen Rutger A. 
Published: September 2010

AbstractMicroporous, silica‐supported metal oxides with a very narrow pore size distribution around 0.6 nm diameter, typical surface areas ranging from 350 to 700 m2/g, and loadings of well‐dispersed metal oxide (up to w = 10% of metal) result from the controlled calcination of silsesquioxane metal complexes. A versatile new methodology is envisioned that, in a combinatorial fashion, enables catalyst preparation with control over metal content and dispersity, together with adjustable Lewis and Brönsted acidity. In addition, the method is suitable for the preparation of bi and multifunctional catalysts containing different metals.
Oxidative Dehydrogenation of Ethane to Ethylene over LiCl/MnOx/PC Catalysts
Authors: Ge Qing‐Jie , Li Wen‐Zhao , Yu Chun‐Ying , Xu Heng‐Yong 
Published: September 2010

AbstractThe catalytic stability of LiCl/MnOx/PC catalyst have been investigated, the deactivation mechanism was discussed. The experimental results show that ethane conversion decreases and ethylene selectivity keeps about 90% as reaction time increases. The main deactivation reasons of LiCl/MnOx/PC catalyst for oxidative dehydrogenation of ethane (ODHE) to ethylene are the transition of active species Mn2O3 to MnO species and the loss of active component Cl in catalyst. Instead of ethane with FCC tailed‐gas, the stability of LiCl/MnOx/PC catalyst has been largely improved.
Synthesis of 1‐Methyl‐3‐aryl‐substituted Titanocene and Zirconocene Dichlorides and Crystal Structure of Bis[η5‐1‐methyl‐3‐(α, α‐dimethylbenzyl) cyclopentadienyl] titanium Dichloride
Authors: Qian Yan‐Long , Qin Xin‐Rong , Huang Ji‐Ling , Chan Albert Sun‐Chi , Chen Shou‐Shan , Wang Hong‐Gen 
Published: September 2010

AbstractThe syntheses of a series of l‐methyl‐3‐aryl‐substituted titanocene and zirconocene dichlorides are reported. These complexes are synthesized by the reaction of 2‐ and 3‐methyl‐6, 6‐dimethylfulvenes (1:4) with aryllithium, followed by the reaction with TiCl4·2THF, ZrCl4 and (CpTiCl2)2O respectively, to give complexes 1–5. The complex [η5‐1‐methyl‐3‐(α, α‐dimethylbenzyl) cyclopentadienyl] titanium dichloride has been studied by X‐ray diffraction. The red crystal of this complex is monoclinic, space group P2t/C with unit cell parameters: a =6.973(6) × 10−1 nm, b =36.91(2) × 10−1 nm, c = 10.063(4) × 10−1 nm, α=β= γ = 93.35(5)°, V = 2584(5) × 10−3 nm3 and Z = 4. Refinement for 1004 observed reflections gives the final R of 0.088. There are four independent molecules per unit cell.