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1.
《Polyhedron》1987,6(2):285-288
Some new U(VI) and Ce(IV) complexes of 1-(2′-hydroxybenzyl)-2-(2′-hydroxyphenyl)-benzimidazole have been prepared and characterized by spectrg magnetic and conductance studies. IR spectral data suggests that the ligand in all the complexes is monodenate through the tertiary nitrogen and that the phenolic oxygen is free from coordination. Conductivity measurements indicate that the nitrate and acetate complexes of U(VI) are non-electrolytes, whereas the nitrate complex of Ce(IV) is a 1:1 electrolyte. 相似文献
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《Journal of Coordination Chemistry》2012,65(5):911-922
Condensation of salicyldehyde with (R or S)-2-amino-2-phenylethanol or rac-2-amino-1-phenylethanol gives enantiopure (R or S)-2-(salicylaldimine)-2-phenylethanol (R- or S-H2L1) or (rac)-2-(salicylaldimine)-1-phenylethanol (rac-H2L2). The Schiff bases coordinate to [Rh(η 4-cod)(μ-O2CCH3)]2 to afford mononuclear [Rh(η 4-cod){(R or S)-2-(salicylaldiminato)-2-phenylethanol-κ 2 N,O}], [Rh(η 4-cod)(R- or S-HL1)] (1 or 2), or [Rh(η 4-cod){(rac)-2-(salicylaldiminato)-1-phenylethanol-κ 2 N,O}], [Rh(η 4-cod)(rac-HL2)] (3). The Schiff base and complexes are characterized by IR-, UV/Vis-, 1H/13C-NMR-, mass-spectroscopy, circular dichroism (CD), and polarimetry. The synthetic and spectroscopic results suggest that deprotonated Schiff base coordinates to [Rh(η 4-cod)] as a six-membered N,O-chelate with distorted square planar geometry at rhodium. CD and polarimetry measurements show the enantiopurity of the Schiff bases as well as the complexes in solution. The in situ system composed of [Rh(η 4-cod)Cl]2 and S-H2L1 has been used as a catalyst for the reduction of acetophenone into rac-1-phenylethanol with 85% conversion in diphenylsilane at 0–5°C. 相似文献
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微乳液-1-(2-吡啶偶氮)-2-萘酚体系测定Cd(Ⅱ) 总被引:7,自引:0,他引:7
研究了O/W型阴离子微乳液十二烷基硫酸钠(SDS)/正丁醇(n-C4H9OH)/正庚烷(n-C7H16)/H2O对Cd(Ⅱ)与1-(2-吡啶偶氮)-2-萘酚(PAN)显色体系的增敏增稳作用,试验结果表明,其灵敏度为ε^545=1.93*10^4L.mol^-1.cm^-1,与相同含水量的SDS胶束体系(ε^545=1.15*10^4L.mol^-1.cm^-1)比较,其测定灵敏度显著增加,用于香烟样品分析,结果满意。 相似文献
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A. B. Dobrynin P. I. Gryaznov O. E. Naumova I. A. Litvinov V. A. Alfonsov 《Journal of Structural Chemistry》2008,49(5):917-921
An X-ray study of (3Z)-(±)-4-(2′-hydroxypropyl)amino-and (3Z)-4-(2′-hydroxyethyl)amino-pent-3-en-2-ones is reported. The bond lengths inside the H ring are equalized due to the classical N-H...O hydrogen bond between the carbonyl oxygen and the amino group. In the 4-(2′-hydroxyethyl)amino-pent-3-en-2-one crystal, due to the classical N-H...O bonds, infinite zigzag chains are formed along the 0b axis and arranged into a layered structure due to the weak C-H...O interactions. In (±)-4-(2′-hydroxypropyl)aminopent-3-en-2-one crystal, however, centrosymmetric dimers are formed, which are then linked by weak C-H...O intermolecular interactions to form a layered structure along the a0b plane. 相似文献
6.
以邻苯二胺、丙二酸和果糖为主要原料,经Knoevenagel反应合成了一个新的芳稠杂环化合物——1,1-二(苯并咪唑-2-基)-2-(喹喔啉-2-基)乙烯(4),收率78.61%,其结构经1H NMR,IR和元素分析表征。利用UVVis和FL研究了4的光学性能,结果表明:4的最大吸收峰位于259 nm和383 nm;在320 nm激发波长激发下,4的λem位于495 nm,具有显著的日光紫外线吸收性能;TG/DTA分析表明:4的熔点为320℃,初始分解温度为402℃,具有良好的热稳定性。 相似文献
7.
4-(6-甲氧基-2-萘基)-2-(2-羟苄亚氨基)噻唑合成与表征 总被引:1,自引:0,他引:1
6-甲氧基-2-(2-溴酰基)萘与硫脲反应环合得4-(6-甲氧基-2-萘基)-2-氨基噻唑;后者与水杨醛反应制备了新化合物4-(6-甲氧基-2-萘基)-2-(2-羟苄亚氨基)噻唑,收率为72.1%~94.8%.目标物采用核磁共振、红外光谱和元素分析测试技术进行了表征;分析目标物和中间体中萘环质子偶合分裂情况.并且确定了萘环上各质子的归属. 相似文献
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Abstract: A three step synthesis of the advanced glycosylation endproduct 2-(2′-furoyl)-4(5)-(2′-furanyl)-1H-imidazole (4, FFI) has been achieved from 2-acetylfuran. The key step in the synthesis was the rearrangement of the hydrazinium bromide 3 in refluxing methanol. 相似文献
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Isaac Abrahams Michael Lazell Majid Motevalli Charlotte K. Simon Alice C. Sullivan 《Chemistry of Heterocyclic Compounds》1999,35(8):954-964
Three structurally different metallasiloxanes were formed from reactions between in situ generated suspensions of Ph2Si(OH)2/BuLi (1∶2) in tetrahydrofuran (THF) with, metal dichlorides MgCl2·2THF, CrCl2, or CoCl2 followed by toluene/Py (Py=pyridine) work-up. The X-ray structures are reported for: [Mg{O(Ph2SiO)2}2]-μ-(LiPy)-μ-{(LiPy)3(OH)(Cl)] (1) incorporating two six-membered magnesiasiloxane rings and an MgLi3O3Cl cubane fragment, [{O(Ph2SiO)2}Co{O(Ph2SiO)3}-μ-(LiPy2)2] (2) with both six-and eight-membered cobaltasiloxane rings and [Cr{O(Ph2SiO)2}2-μ-(LiPy2)2] (3) with two six-membered chromiasiloxane rings. Structure assembly in these cases is apparently dictated by the metal dichloride. The compound [{O(Ph2SiO)2}Mg{O(Ph2SiO)3}-μ-(CoClPy)2]·Py (4) is formed from [{O(Ph2SiO)2}Mg{O(Ph2SiO)3}-μ-(LiPy2)2] and CoCl2 (1∶2). 相似文献
11.
Raj Kumar Ramagiri 《合成通讯》2014,44(9):1301-1306
A simple and highly efficient one-pot, three-component synthesis of 3-(2-(4-chlorophenylimino)-3-(4-chlorophenyl)-2,3-dihydrothiazol-4-yl)-2H-chromen-2-ones has been reported by the reaction of 3-(2-bromoacetyl)-2H-chromen-2-one, primary amines, and phenyl isothiocyanates in presence of dimethylformamide as a solvent. The structures of newly synthesized compounds were confirmed by their analytical and spectral data. 相似文献
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The
spectrohpotometric determination of Co(Ⅱ) was studied with 1-( 2 -pyridylazo)-2-naphthol
in the sodium dodecyl sulphate/n-heptane/water micr oemulsion medium.The apparent molar
absorptivity is 1.84×104 L.mol -1.cm-1
at 575 nm.Beer's law is obeyed in the range of 0~ 50 μg/25 mL for Co(Ⅱ). 相似文献
13.
Legendre B. Baziard-Mouysset G. Anastassiadou M. Leger J. M. Payard M. 《Journal of Thermal Analysis and Calorimetry》2001,66(2):659-673
The compound 2-(2-benzofuryl) Δ-2 imidazoline, has been studied by DSC, TG, X-ray diffraction and thermomicroscopy.
We shall see that in the case of a study by DSC this compound presents a strange behaviour, which apparently is in contradiction
with the thermodynamic rules. In a case of monotropy, if we have the α-phase (stable) and the γ-phase (metastable), after
melting and cooling only theα-phase could crystallise. But this compound can give, according to the rate of cooling, theγ-phase
metastable. The rate of cooling is of fundamental importance and the monotropic behaviour of this compound will be explained
using the Gibbs function G=f(T) for P=1 atm.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
14.
Danijel Kikelj Aleš Krbavčič Slavko Pečar Alenka Tomažič 《Monatshefte für Chemie / Chemical Monthly》1991,122(4):275-281
Summary Synthesis of the hydrochloride oftrans-2-(2-aminocyclohexyloxy)acetic acid (4) fromtrans-2-(2-azidocyclohexyloxy)acetic acid (1) is described.4 was acylated at the amino group to give compounds5–8.1 was converted into acid chloride (9) and amides10–13.
Synthese und Funktionalisierung dertrans-2-(2-Aminocyclohexyloxy)- undtrans-2-(2-Azidocyclohexyloxy)essigsäure
Zusammenfassung Die Synthese destrans-2-(2-Aminocyclohexyloxy)essigsäurehydrochlorids (4), ausgehend vontrans-2-(2-Azidocyclohexyloxy)essigsäure (1), wird beschrieben.4 wurde durch Acylierung der Aminogruppe in die Verbindungen5–8 übergeführt.1 wurde in das Säurechlorid9 und die Carbonsäureamide10–13 umgewandelt.相似文献
15.
《合成化学》2004,(Z1)
During our synthesis of N-benzoyl-N'-aryl selenourea derivatives, we isolated the title compound. One of them was selected optically for the diffraction study. The crystal belongs to the Monoclinic space group P21/n, Mr = 353.27, a = 11.073(1)? , b = 5.745(1) ?, c = 24.356(5) ?, β = 92.10 (1) , V = 1548.3 (4) ?3, Z = 4, Dx=1.515 Mg/m3,λ(Mo Kα)=0.71073 ?,θ = 1.67-25,μ o = 2.428 mm-1 , T = 296 (2) K. View of the molecule showing the labeling of the non-H atoms are described as: The se… 相似文献
16.
以3-苯氧(硫)基丙炔(1)为原料,经5步反应合成(Z)-2-苯氧(硫)基甲基-2-戊烯-γ-内酯(8)和(Z)-2-苯硫亚甲基-γ-戊内酯(9).合成关键步骤为TMSCl/NaI/H2O/CH3CN体系中化合物(3)的碘氢化和去共轭. 相似文献
17.
Suitably functionalized alkylphenylsulfones have been used as building blocks for the synthesis of several modified side-chains steroids1. We describe here the synthesis of (S)-2-methyl and (2S)-2,3-dimethyl butyl phenylsulfones (4a) and (6), which can be used for the construction of the side chain of a few marine sterols2 or brassinosteroids3 as well. 相似文献
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2-(Hydroxyphenylamino)- and 2-(aminophenylamino)-4-methylquinolines and N,N′-bis(4-methylquinolin-2-yl)benzenediamines were synthesized by reactions of 2-chloro-4-methylquinolines with o-, m-, and p-aminophenols and o-, m-, and p-phenylenediamines. 相似文献