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1.
四元体系CsCl—PrCl3—13%HCl—H2O(25℃)和CsCl—PrCl3—42%H…   总被引:1,自引:0,他引:1  
测定了四元体系CsCl-PrCl3-13%HCl-H2O(25℃)和CsCl-PrCl3-42%HAc-H2O(30℃)的稳定平衡态的溶液数据,绘制了相应的溶度图,两个体系的皆中有4种固相,CsCl,PrCl3.6H2O2种原始盐和CsCl.PrCl3.6H2O,3CsCl.PrCl3.7H2O2种复盐,证实了文献中对Meyer反应1机理的解释,并对新相进行了热分析,X射线粉末衍射及偏光显微镜测定  相似文献   

2.
碱金属和稀土溴化物Meyer反应的相化学研究(I)   总被引:2,自引:1,他引:2  
研究了四元体系CsBr-LaBr3-HBr(12%)-H2O(25℃)的相化学关系,绘制了相应的溶度图。在该体系中发现一种新型化合物5CsBr.2LaBr3.22H2O;对该人合物进行了偏光、X射线粉末衍射、TG及DTA等方面的,将本体系与四元系CsCl-LaCl3-HCl(13%)-H2O(25℃)相比较,发现两者在生命化合物的数量、种类和相化学行为方面均有较大的差异。  相似文献   

3.
测定了LaX3-C18H16N3O2Cl-H2O(X=NO^3,Cl^-)三元体系在30℃时的溶度和饱和溶液的折光率。发现La(NO3)3=C18H16N3O2Cl-H2O体系有不一致溶化合物La(C18H16N3O2Cl)3(NO3)3生成,而LaCl3-C18H16N3O2Cl-H2O体系为简单共饱体系。  相似文献   

4.
测定了三元体系La(ClO4)3-OCBAAP-H2O在30℃时的溶解度.结果表明,该体系有一个新固相(不一致溶解化合物)La(OCBAAP)4(ClO4)3·6H2O形成.参考该体系溶度图确定合成条件,合成了系列化合物Ln(OCBAAP)4(ClO4)3·nH2O(Ln=La,n=6;Ln=Pr,Nd,Sm,Gd,Yb,n=2).通过化学分析、元素分析、TG-DTG、IR和密度对化合物进行了表征,计算了La(OCBAAP)4(ClO4)3热分解过程各阶段的表观活化能.  相似文献   

5.
Ln(ClO4)3—DAPTU—H2O三元体系30℃时的相平衡研究   总被引:3,自引:4,他引:3  
测定了Ln(ClO4)3-DAPTU-H2O(Ln=Ln,Sm,Yb)三元体系在30℃时的溶解度及饱和溶液的折光率,绘制了相应的溶度图和折光率-组成图。各体系的溶度曲线和折光率曲线均由三支组成,分别与DAPTU、Ln(DAPTU)2(ClO4)3·8H2O(Ln=La,Sm,Yb)和Ln(ClO4)3·nH2O(Ln=La,n=8;Sm,n=9;Yb,n=8)相对应。从溶度图上发现了3个未见文献报  相似文献   

6.
测定了Ln(ClO_4)_3-DAPTU-H_2O(Ln=La,Sm,Yb)三元体系在30℃时的溶解度及饱和溶液的折光率,绘制了相应的溶度图和折光率-组成图,各体系的溶度曲线和折光率曲线均由三支组成,分别与DAPTU、Ln(DAPTU)_2(ClO_4)_3·8H_2O(Ln=La,Sm,Yb)和Ln(ClO_4)_3·nH_2O(Ln=La,n=8;Sm,n=9;Yb,n=8)相对应。从溶度图上发现了3个未见文献报道的固液异组成溶解的化合物,通过化学分析及元素分析、TG-DTG、IR对其进行了表征。  相似文献   

7.
Preparation and Crystal Structures of LaCl_3(12-crown-4)(MeOH)and[LaCl_3(phen)_2(H_2O)]·MeOHMaoJiang-Gao(FujianInstituteofResea...  相似文献   

8.
合成了3个分别以C2O^2-4(「Cu2(L1)2(ox)」,1),AcO^-(「Cu2(AcO)(L2)2」BF4,2)和酚氧(「Cu29L302」(ClO4)2,3)为桥基的双核铜配合物,并测定了1的复配合物「Cu2(L1)2(ox)」「Fe(OH)2(H2O)4」ClO4.H2O及2和3的晶体结构。  相似文献   

9.
本文借助于DTA和X射线结构分析测定了LaCl3-SrCl2-MgCl2三元体系相图,发现它属简单低共熔型,体系内有对应于LaCl3,SrCl2和MgCl2的3个液相面、3条2次结晶线和1个三元低共熔点E(15.0wt%LaCl3,49.5wt%SrCl2,35.5wt%MgCl2;545℃),并且在固相下有一个不稳定的化合物生成,在约500℃时分解。  相似文献   

10.
低温煤焦油电解加氢性能的研究   总被引:9,自引:2,他引:9  
对电极材料、溶剂种类、支持电解质种类等的选择、低温煤焦油在间歇式卫离电解槽中,以铅板为阴极,、铂丝为阳极,以DMF=C2H3OH-H2O-Bu4NBr为电解体系,电解后可得到较争孤加氢效果,当DMF:C2H5OH=2:3(体积比),「H2O」=2.5mol/l,「Bu4NBr」=0.50mol/l,T=306K,电解电位为-2.2V,电解后的焦油中氢含量可提高0.84%,H/C原子比可增加0.15  相似文献   

11.
12.
2,2-Dimethyl-3-(2,2-dichloroethecyclopropanecarbonylchloride(hereafterreferredtoaspermethricacidchloride)isausefulintermediateforthepreparationofsomesyntheticpyrethroids,suchaspermethrinandcypermethrin.Permethricacidchloridehasageometricalisomericpair,oiLyandtrans,owingtoitscyclopropanering.Itisknownthat,ingeneral,theestersderivedfromtheirans-isomerarelesstoxictomammalsthanthosederivedfromtheets-isomerl--3.Thepermethricacidproducedindustriallyisalwaysinformsofmixturesoftrans-andets-isomers.Ac…  相似文献   

13.
The synthesis of monomer, dimer, tricyclohexyl- and triphenyl-tin(IV) complexes with phthalimido-4-methyl pentanoic acid (PMPA) are described and characterized by FT IR, CHN analyzer, 1H, 13C 119Sn NMR and 119mSn Mössbauer spectroscopic techniques. In vitro ED50, anti-tumor (phytotoxic), anti-yeast, blood pressure and heart rate effect, and bactericidal, fungicidal as well as analgesic bioassays of complexes are also be carried out. The ligand (PMPA) shows excellent analgesic activity while the dimer exhibit strong biocidal and excellent anti-tumor behavior besides of tri-organotin(IV) complexes.  相似文献   

14.
Efficient methods for the syntheses of amines 6b and 9b, the major metabolites of the antidepressant drugs amitriptyline 1a and nortriptyline 1b, are described.  相似文献   

15.
Pseudo acid chlorides derived from levulinic acid ando-benzoyl-benzoic acid, solvolyse in aqueous acetone, aqueous dioxane and aqueous dimethylformamide by aS Nl process. Their reaction pattern is distinct from that of typical normal acid chlorides, viz.,p-benzoylbenzoyl chloride and fluorene-9-one-1-carboxylic acid chloride, which solvolyse by aS N2 pathway. No evidence for tautomerism could be obtained either between the normal and pseudo forms of the acid chlorides or the derived ion pairs.  相似文献   

16.
将氯化重氮苯的溶液加入氯化汞、维生素C、丙酮和少量氯化铜的混合物中,得到80%的氯化苯汞;如在反应混合物中补加维生素C、氯化铜和浓氨水,则得到二苯汞。用同样的方法制备了其他的二芳基汞,并讨论了反应可能的机理。  相似文献   

17.
The hafnium chloride (HfCl4) and scandium chloride (ScCl3) catalyzed conjugate additions of heterocyclic compounds, such as indoles, pyrrole, pyrazole, and imidazole, have been demonstrated. Hafnium chloride effectively catalyzed the conjugate addition of indoles to α,β-unsaturated carbonyl compounds, and the addition product was obtained in high yield. The reaction of pyrrole was also catalyzed by HfCl4 or ScCl3, and produced 2,6-dialkylated pyrroles up to 99% yields. Furthermore, the conjugate addition of the 1-position of the pyrazoles and imidazole occurred, and produced several substituted heterocyclic compounds in good yields.  相似文献   

18.
19.
Dansyl chloride (DNS-Cl) is a sulfonyl chloride compound which is utilized as a fluorescent probe for quantitative analysis or structural studies of complex molecules. The fluorescent emission was sufficiently strong to permit detection of less than 10 μg of the carboxyl compounds studied here. The dansylation of aromatic carboxyl compounds (i.e. aspirin), aromatic primary amines, and aliphatic carboxyl compounds was accomplished in 1 M Na2CO3 buffer at pH 11. The fluorescent labeled analytes were then isolated by thin layer chromatography (TLC) or the aqueous mixture was pre-extracted with proline (or glycine) to eliminate back-ground emission originating from the hydrolized or sulfonic acid form of DNS-Cl. Fluorescent labeled analytes are clearly discerned under ultraviolet light. Limits of detection for dansylated carboxyl compounds was 1-5 μg, however for amines it was approximately 1 μg. Dansylation of aromatic primary amines proceeded much faster (15 min) than that of carboxyl compounds (≥1.5 h) at 25 °C. Despite the aqueous solubility of analytes, which ranged from less than 0.004-5.30 mg/ml, the dansylation of carboxyl compounds was effective. Various organic solvents for extracting derivatives from aqueous mixture were evaluated.  相似文献   

20.
Several 2,2,2-trifluoroacetimidoyl chlorides have been prepared in a one-pot stage from primary aromatic amines and trifluoroacetic acid. The reactions were carried out with different primary aromatic amines which they contain additional functional groups and good yield were obtained.  相似文献   

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