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Transition metal carbene complexes——Ⅳ. Synthesis and crystal structure of a novel iron-sulfur cluste
π-Cyclopentadinyl(dicarbonyl)(phenylcarbyne)rhenium-tetrabromoborate, [π-C_5H_5(CO)_(2-)ReCC_6H_5]BBr_4 (3), at low t......
Allylalkoxydimethylsilanes (2) condense with (-)-menthyl glyoxylate (3) in the presence of Lewis acid to give optically......
Synthesis of propyl O-(α-L-rhamnopyranosyl)-(1→3)-[2,4-di-O-(2s-methylbutyryl)-α-L-rhamno-pyranosyl]
Propyl O-(α-L-rhamncpyranosyl)-(1→3)-[2,4-di-O-(2s-methylbutyryl)-α-L-rham-nopyranosyl]-(1→2)-(3-O-acetyl-β-D-gluc......
An altemative synthetic approach towards erythrinan and homoerythrinan alkaloids by tandem semipinac
An alternative construction of A-B-D ring-system of erythrinan and homoerythrinan alkaloids by TiCl_4-mediated tandem se......
A reaction density functional theory study of solvent effects on keto-enol tautomerism and isomeriza
It is important to study the solvent effect on keto-enol tautomerism that has applications in many areas of chemical eng......
Effect of ploidy level on expression of lycopene biosynthesis genes and accumulation of phytohormone
The difference between lycopene and phytohormone levels among diploid, triploid and tetraploid plants of two watermelon ......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
A reaction density functional theory study of solvent effects on keto-enol tautomerism and isomeriza
It is important to study the solvent effect on keto-enol tautomerism that has applications in many areas of chemical eng......
合成了通式为K_(13)[Ln(β_i-SiW_(11)O_(39))_2]·xH_2O(Ln=La,Ce,Pr,Nd,Sm,Gd,Er;β_i=β_1,β_3)的两个系列的β-异构体。......
采用贵金属Pt、Pd为活性组分，HZSM-5沸石为载体，制备正丁烷异构化催化剂，在加压连续微反-色谱装置上对催化剂的反应性能进行考察。结......
以活性水合三氧化二铝为铝源，三乙胺为模板剂，用水热晶化法合成了ＣｏＡＰＳＯ－５分子筛，研究了合成条件对合成合产物的影响，用Ｘ射线衍射，红外光谱，电子探......
A new planar isomer of HNC3 system,H-cCNC-C,is theoretically predicted by means of B3LYP and CCSD(T) methods.The suggest......
氨基酸同分异构体的检测对食品安全和药品药性控制有重要意义.亮氨酸与异亮氨酸是同系的同分异构体,它们具有相似的化学结构,但物......
太赫兹（THz）波是指频率在0.1~10THz频段的电磁波。太赫兹光谱技术不同于以往的检测手段,可以用于检测氨基酸同分异构体,反映物质的分......
采用无胺法高硅丝光沸石合成了产率，降低了生产成本并解决了环保及生产问题。结果表明，采用本高硅载体工艺，直接合成出合格的C5／C6异构......
以往河工模型多采用卵石加糙,结合目前江河卵石禁采的生态环境保护前提和碎石加糙具有获取方便和糙率较大的特点,进行碎石阻力研究......
对３种苄基化β－环糊精固定相进行了研究，考察了它们的色谱性能及对各种位置异构体的分离，研究了柱温对保留行为的影响，并讨论了环糊精保......
The unsaturated germylenoid H2C=GeLiF has been studied by using DFT method at the B3LYP/6-311+G (d, p) level. Geometry o......
本文研究了在杯 [6]芳烃存在下杯 [6]芳烃的浓度、检测波长、有机混合添加剂对o、m、p -硝基苯胺位置异构体毛细管电泳分离的影响......
用ab initio方法在UMP2/6-311G(d)水平下计算了Al2F2分子可能的异构体构型和AlF二聚化成Al2F2分子的反应能.UMP2/6-311G(d)和UQCIS......
Objective: Tumor heterogeneity renders identification of suitable biomarkers of gastric cancer(GC)challenging. Here, we ......
通过考察了ＳＯ＾２－４／ＺｒＯ２及Ｐｔ－ＳＯ＾２－４／ＺｒＯ２固体超强酸催化剂的合成条件和铂含量及正戊烷异构化的反应条件，并运用ＩＲ、ＸＰＳ，硫碳测仪及ＸＲＤ等手段分析反应前后催化剂的酸性，硫......
概述了近年来用1HNMR表征一些四取代酞菁金属配合物异构体的研究进展情况。四取代酞菁配合物存在4种异构体和8种磁不等价的异吲哚......
