PREPARATION AND STRUCTURE OF HALF-OPEN VANADOCENE, V[2,4-(CH3)2C5H5](C5H5)CO

The half-open vanadocene, V[2,4-(CH3)2C5H5](C5H5)CO, was obtained by the reaction of V[2,4-(CH3)2C5H5](C5H5)PMe3 with CO in petroleum ether at room temperature. Its crystal structure was determined by X-ray diffraction technique. The crystal was monoclinic with space group P2(1)/n, a = 16.614(3), b = 7.636(1), c = 19.128(6) angstrom, beta = 99.92(2)-degrees, V = 2390.5(9) angstrom3, and Z = 8. The final R value was 0.043. The V(1)-CPD(1) (half) (PD = 2,4-(CH3)2C5H5) bonds were shorter (0.038 angstrom) than the V(1)-CCP(1) (half) (CP = C5H5) bonds, averaging 2.224(4) versus 2.262(4) angstrom, respectively. 4V[2,4-(CH3)2C5H5](C5H5)CO has been characterized by IR and EPR methods.

SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF [EU(ETA-6-C6ME6)(ALCL4)2]4 - THE 1ST CYCLOTETRAMERIC LANTHANIDE(II) COMPLEX WITH A NEUTRAL PI-LIGAND

The reaction of EuCl3, AlCl3 and C6Me6 in toluene gives the Eu(II) complex [Eu(eta-6-C6Me6)(AlCl4)2]4; X-ray crystal determination shows the molecule to be a cyclotetramer, in which the four Eu(C6Me6)AlCl4 units are connected via four groups of eta-2-AlCl4.

二(2,4,4-三甲基戊基)膦酸从盐酸介质中萃取分离钪(Ⅲ)和铁(Ⅲ)

本文研究了二(2,4,4-三甲基戊基)膦酸(HBTMPP)的正辛烷溶液对Sc(Ⅲ),Fe(Ⅱ)的萃取平衡影响,研究了酸度对Sc(Ⅲ)、Fe(Ⅲ)分配比影响,探讨了Sc(Ⅲ)和Fe(Ⅲ)的分离可能性。用斜率法确定了萃合物组成和萃取反应机理,并研究了萃合物的IR、NMR谱,求得了萃取反应的平衡常数和热力学函数。

4-(2-甲氧基乙氧基)-三-4-(2,4-二特戊基苯氧基)酞菁铜的合成及其LB膜特性研究

LB膜的特性在很大程度上决定于成膜分子的结构。铜酞菁衍生物具有大π键电子共轭体系,有明显的光电特性,成膜性好,很适于作LB膜气敏材料。我们在前期工作的基础上,为探明气敏特性与化合物结构间的关系,设计并合成了标题化合物,并对其LB膜的气敏特性进行了研究。

四(2,4-二特戊基苯氧基)酞菁铜LB膜的制备及结构表征

酞菁类化合物具有良好的热稳定性和化学稳定性,已被广泛应用于光敏,气敏,及分子电子器件等领域。用LB方法对酞菁类化合物进行分子组装,用光谱等手段对其膜结构进行表征已引起人们的重视。本文作者之一合成了具有良好LB成膜特性的四(2,4-二特戊基苯

三-(2,4-二特戊基苯氧基)-(对羧基苯氧基)酞菁铜拉曼光谱

观测了三-(2,4-二特戊基苯氧基)-(对羧基苯氧基)酞菁铜的共振与非共振拉曼光谱,比较二者的差异对某些振动谱带的归属进行了修正。

SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF SM(C8H8)(2,4-C7H11).THF

SmCl3 reacts with K2C8H8 to yield the complex Sm(C8H8)Cl.2thf, which reacts with K(2,4-C7H11) (2,4-C7H11 = 2,4-dimethylcyclopentadienyl) to form Sm(C8H8)(2,4-C7H11).thf; the X-ray crystal structure of Sm(C8H8)(2,4-C7H11).thf shows that the 2,4-dimethylcyclopentadienyl has a 'U' conformation.

[2,4-(CH_3)_2C_5H_5]NdCl_2·3THF-AlEt_3体系引发丁二烯聚合的活性

戊二烯稀土配合物化学目前尚处于萌芽时期,只报道有几个配合物的合成,戊二烯稀土氯化物的合成则至今未见报道.最近,东德专利报道了[2,4-(CH_3)_2C_5-H_5]_3Nd在双烯烃定向聚合上的应用.我们合成了2,4-二甲基戊二烯基稀土二氯化物,并考察了其对双烯烃的聚合催化活性. 1.试剂和分析方法:聚合用溶剂经纯化,活性氧化铝浸泡后使用.稀土含量分析用二甲酚橙为指示剂以EDTA标准溶液滴定;氯含量分析用硫酸铁铵为指示剂,加过量

双[4-(2,4-二特戊基苯氧基)邻苯二腈铜]LB膜材料的合成

近年来,随着LB膜研究的进展,成膜材料的种类逐渐增多、其中有关酞菁衍生物LB膜材料的报道较多。本文合成了下述新型结构的化合物:

四(2,4-二叔戊基苯氧基酞菁铜(Ⅱ)的合成及其LB膜

合成了标题酞菁铜衍生物,并通过元素分析,高压液相色谱,紫外光谱,红外光谱,核磁共振谱,电镜,顺磁共振谱及质谱加以确认。该化合物在稀氯仿溶液和LB膜中各以单,双分子缔合的形式存在。Z型沉积形成的单层LB膜对氨气有很高的灵敏度和选择性。

2,4-二甲基戊二烯基稀土配合物的合成

通过元素分析、红外光谱、核磁共振谱、热重分析、晶体结构的测定以及对化合物水解产物的分析。确认合成了下列配合物: 〔η~5-2,4-(CH_3)_2C_5H_5〕LnCl_2·3THF(Ln=Nd,Sm,Gd), 〔η~5-2,4-(C_3H)_2C_5H_5〕_2LnCl·THF(Ln=Nd,Sm), 〔η~5-2,4-(CH_3)_2C_5H_5)_3Ln(Ln=La,Sm,Gd), (2,4-(CH_3)_2C_5H_5=2,4-二甲基戊二烯基。 THF=四氢呋喃

镧系金属有机配合物Gd(2,4-C_7H_(11))_3的晶体和分子结构

2,4-二甲基戊二烯基的金属配合物在一些性质上可与相应的环戊二烯配合物相比拟。已报道了许多d过渡金属以及碱金属钾的配合物的晶体结构。对于镧系金属,仅Ernst等得到了2,4-二甲基戊二烯钕的配合物并测定了晶体结构,其晶格中含有无序的乙醚溶剂分子。本文报道了不含溶剂分子的Gd(2,4-C_7H_(11))_3,配合物在低温下的晶体结构。

Inhibition Effect of 2,3,5-Triphenyl-2H-tetrazolium Chloride and 2,4,6-Tri(2-pyridyl)-s-triazine on the Corrosion of Mild Steel in 1 mol/L HCl and Mechanism Study (II)

The inhibitory effect of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) and 2,4,6-tri(2-pyridyl)-s-triazine (TPT) molecules on the corrosion of mild steel in 1 mol/L HCl and microcosmic inhibitory mechanism were investigated by X-ray photoelectron spectroscopy and ellipsometry. XPS results showed that C Is and N Is peaks of TTC, C Is and N Is peaks of TPT and their integral areas were obtained, which suggested the layer of the inhibitors (TTC or TPT) should have effectively protected the mild steel surface from the corrosion; and the depression from the inhibitors for the corrosion of mild steel surface was studied using ellipsometry combined with potentiodynamic polarization and the phasic difference was gained, which displayed the inhibitory coverage of the inhibitors formed.