共查询到20条相似文献,搜索用时 62 毫秒
1.
Julia E. Morozova Ella Kh. Kazakova Eduard Ph. Gubanov Nelly A. Makarova Victor P. Archipov Tatjana V. Timoshina Zaymil Sh. Idijatullin Wolf D. Habicher Alexander I. Konovalov 《Journal of inclusion phenomena and macrocyclic chemistry》2006,55(1-2):173-183
Present paper reports on tensiometric studies of tetramethylsulfonatoresorcinarenes 1 and 2 with nonionogenic guests 3 and 4, pyrimidin derivative and O,O-dymethyl-1,1-dimethyl-3-oxobutylphosphonate, respectively. Association of resorcinarenes with these guests leads to dramatic change of adsorption characteristics of their solutions. CCMs1 of associates (1&3, 1&4, 2&3, and 2&4) are lower and the estimated surface activity, as well as the height of adsorption layers are higher than for individual substances. Aggregation of compounds 1–4 and association of 1 with 3 and 4 in solution were confirmed by 1H NMR spectra and studied by diffusion NMR with impulse magnetic field gradient. 相似文献
2.
Renji Okazaki Masaharu O-oka Norihiro Tokitoh Yoko Shishido Toshio Hasegawa Naoki Inamoto 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-2):161-166
Abstract Disodium 1, 6-disulfido-1, 3, 5-cycloheptatriene 3, formed by reduction of 1 with sodium in liq. ammonia, reacts with hydrogen chloride and methyl iodide to give 1, 6-dimercapto-, 4, and 1, 6-bis(methylthio)-1, 3, 5-cycloheptatrienes 5 respectively; however, it is oxidized by bromine to afford cyclic disulfide 6. 1, 6-Diiodo-1, 3, 5-cycloheptatriene 2 is converted to 1, 6-bis(benzylthio)-1, 3, 5-cycloheptatriene 7 by reaction with sodium phenylmethanethiolate, whereas similar reactions with 1-(2-hydroxyethyl)-6-iodo-1, 3, 5-cycloheptatriene 9, obtained from 2 via 1-iodo-6-vinyl-1, 3, 5-cycloheptatriene 8, give 1-benzylthio-6-(2-hydroxyethyl)-1, 3, 5-cycloheptatriene 10. 1-Benzylthio-6-benzylthioethyl-1, 3, 5-cycloheptatriene 11 is synthesized by the reaction from 9 via 1-(2-bromoethyl)-6-iodo-1, 3, 5-cycloheptatriene 10. Attempts to synthesize thiols from 7, 11, and 12 are also described. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(20):2165-2176
Three new copper(II) complexes [CuL1N3]2 (1), [CuL2N3] (2) and [CuL3N3] (3) with three very similar tridentate Schiff base ligands [HL1?=?6-diethylamino-3-methyl-1-phenyl-4-azahex-3-en-1-one, HL2?=?6-amino-3-methyl-1-phenyl-4-azahex-3-en-1-one and HL3?=?6-amino-3-methyl-1-phenyl-4-azasept-3-en-1-one] have been synthesized and structurally characterized by X-ray crystallography. In complex 1 half of the molecules are basal-apical, end-on azido bridged dimers and the remaining half are square-planar monomers whereas all the molecules in complexes 2 and 3 are monomers with square-planar geometry around Cu(II). A competition between the coordinate bond and H-bond seems to be responsible for the difference in structure of the complexes. 相似文献
4.
3-Imino-1-methyl-indolin-2-one (2a) reacts with phosphorus hexamethyltriamide 1(1:1 mol) in dry toluene at room temperature to give the dimeric spirophospholane 4a. On the other hand, the reaction of 3-(4-arylimino)-1-methylindoline-2-ones 2b–2c with trisdimethylaminophosphine 1 in boiling toluene gave phosphoramides 4b and 4c. Furthermore, 1-benzyl-3-(4-arylimino)indolin-2-ones 3a–3c react with aminophosphine 1 in excess as solvent at 110 °C for 6–8 h to give phosphonamides 5a–5c. Possible reaction mechanism are considered and the structural assignments are based on spectroscopic data and x-ray analysis. 相似文献
5.
Min Hu Ling-Yu Yue E. Carolina Sañudo Shao-Ming Fang 《Journal of Coordination Chemistry》2016,69(14):2164-2173
Three new lanthanide complexes incorporating salicylate (HSA or SA) and 1,10-phenanthroline (phen), Ln3(HSA)5(SA)2(phen)3 [Ln = Ho (1) and Er (2)], and Sm2(HSA)2(SA)2(phen)3 (3), have been synthesized. X-ray structural analysis reveals that 1 and 2 are isostructural with a trinuclear pattern, and 3 exhibits a binuclear structure. Comparison of the structural differences between 1/2 and 3 suggests that the identity of metal plays an important role in construction of such complexes. The magnetic properties of 1 are discussed. Moreover, 2 and 3 are both photoluminescent materials, and their emission properties are closely related to their corresponding LnIII centers. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(17):3133-3146
Two unsymmetric bis-aroyl-hydrazines, N′-(2-hydroxybenzoyl)isonicotinohydrazide (L1) and N′-(2-hydroxybenzoyl)nicotinohydrazide (L2), were synthesized through reactions of salicyl hydrazide with isonicotinoyl chloride and nicotinoyl chloride, respectively. Reactions of metal salts with L1 or L2 gave three new complexes, [Cd(L1)2(SCN)2] n (1), [Zn(L1)2Cl2]?·?H2O (2), and [Zn(L2)2Cl2] (3). Complex 1 features a 1-D double-chain structure built by SCN– bridging six-coordinate CdII centers while 2 and 3 are mononuclear ZnII complexes. In 1–3, isomeric ligands L1 and L2 coordinate with metal ions in a terminal coordination mode. Ligands L1 and L2 through O–H···N and N–H···O hydrogen-bonding interactions in 1–3 are crucial for the structure extension into 3-D supramolecular structures of 1 and 2, or 2-D sheet of 3. Complexes 1–3 emit interesting blue-green luminescence. Thermal behaviors of 1–3 as well as the specific rotation of 2 were also investigated. 相似文献
7.
Davood Nori-Shargh Abolfazl Shiroudi Reza Naeem-Abyaneh Maryam Nozari 《Phosphorus, sulfur, and silicon and the related elements》2013,188(2):435-442
Abstract The nature of the transition state structures of the decomposition of 3-pyrroline (1), 2,5-dihydrofuran (2) and 2,5-dihydrothiophene (3) were investigated usingab initio Molecular Orbital (MO) and Density Factional Theory (DFT) methods. The energy barrierof the decomposition of compound 1 is smaller than compound 2 and compound 2 is smaller than compound 3. The energy barriers for the decomposition of compounds 1–3 are 46.20, 50.17, and 61.34 kcal mol?1, respectively, which is calculated by B3LYP/6-31G*//HF/6-31G* level of theory. Which is ingood agreement with reported experimental data. Contrary to the previously reported data, the distance between the cis-2-and-5-hydrogen atoms in compound 1 is greater than compound 2. The transition-state structures of the decomposition of compounds 1–3 are formed by interaction of the cis-2-and-5-hydrogen atoms. Also, the rings of compounds 1–3 in the transition state structures are puckered. 相似文献
8.
The 2-cyclohexenones1 a andd resp. react with urea in HCl/EtOH to give 1-hydroxy-4-methyl-7-phenyl- and 1-hydroxy-2,4-diazabicyclo[3.3.1]nonane-3-ones3a and3d resp., whereas the 2-cyclohexenones1b andc resp. transformed by urea to 1,7-dimethyl- and 1-methyl-4-ureido-2,4-diazabicyclo[3.3.1]nonan-3-ones9b andc resp. In the condensation of isophorone1e with urea a product C13H28N8O4 of indisdinct structure was formed, whereas the bicyclus3e could not be isolated.Reaction ofAcOAc with3a yielded the 5-methyl-3-oxo-7-phenyl-2,4-diazabicyclo[3.3.1]non-1-ylacetate (15); on heating of3a with acids decomposition to1a and urea took place. NoWagner-Meerwein-rearrangement was observed. The MS-spectra of3a andd are discussed; NMR- and IR-data are reported.No significant herbicidal, fungicidal or insecticidal activity was found in screening-tests on3a. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(10):1688-1704
One new pyrazole-based ligand, 1-carboxymethyl-3,5-dimethyl-1H-pyrazole-4-carboxylic acid (H2cmdpca), has been synthesized and characterized. Structural analysis reveals that H2cmdpca crystallizes in the monoclinic system and adopts a 3-D supramolecular network via the interaction of intermolecular hydrogen bonds. The reactions of Cd(II) ions with H2cmdpca and 4,4′-bipyridine (4,4′-bpy) afforded three metal complexes, [Cd(4,4′-bpy)(Hcmdpca)2(H2O)3]·H2O (1), [Cd(4,4′-bpy)(Hcmdpca)2(H2O)]·3H2O (2), and [Cd(4,4′-bpy)(Hcmdpca)2(H2O)] (3). Structural analyses reveal that these complexes are all monoclinic and 1, 2, and 3 exhibit mononuclear, 1-D chain, and 1-D with binuclear loop structures, respectively, which are further assembled into 3-D supramolecular frameworks through non-covalent interactions. 1 and 2 are true supramolecular isomers, while 2 and 3 are “pseudo-supramolecular” isomers. In addition, the thermal stability and luminescent properties of the complexes are also investigated. 相似文献
10.
treatment of 3-anilino thiocinnamic acid anilides 1 with trifluoromethylsulfenyl chloride 3 leads to intramolecular cyclisation of 1 resulting in isothiazol system 4 with excellent yields. Anilides of 3-oxothioacids 2 react with 3 to give 1,2,4-dithiazol derivative 5, product of intermolecular cyclisation. Physical data of the novel compounds are reported. 相似文献
11.
Seiedeh Negar Mousavi Hooriye Yahyaei 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):1528-1536
Abstract The effective factors on the conformational properties of 1,3-dioxanyl (1), -dithianyl (2), and -diselenanyl (3) carbanions have been investigated by means of the hybrid-density functional theory (DFT) (B3LYP/6-311+G**)-based method and natural bond orbital (NBO) interpretation. The results obtained showed that the axial conformation (i.e., the axial H atom attached to C2) of carbanion 1 is more stable than its equatorial conformation. Contrary to the carbanion 1, the equatorial conformations of carbanions 2 and 3 are more stable than their corresponding axial conformations. The instability of the axial conformations of carbanions 1–3 increases from carbanion 1 to carbanion 2 but decreases from carbanion 2 to carbanion 3. The NBO analysis showed that the anomeric effect (AE) associated with the electron delocalization increases from carbanion 1 to carbanion 2, but decreases from carbanion 2 to carbanion 3. The calculated total dipole moment values of the axial conformations of carbanions 1–3 are greater than those of their corresponding equatorial conformations, but the calculated total dipole moment difference values between the axial and equatorial conformations decreases from carbanion 1 to carbanion 3. Consequently, the AE associated with the electron delocalization, but not the total dipole moment changes (i.e., Δμax–eq), thus explaining the total energy differences between the axial and equatorial conformations of carbanions 1–3. The correlations between the AE, dipole moments, ΔGax–eq, structural parameters, and conformational behaviors of carbanions 1–3 have been investigated. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. 相似文献
12.
I. V. Vystorop N. P. Konovalova Yu. V. Nelyubina V. N. Varfolomeev B. S. Fedorov T. E. Sashenkova E. N. Berseneva K. A. Lyssenko R. G. Kostyanovsky 《Russian Chemical Bulletin》2010,59(1):127-135
The reactions of glycine hydroxamic and DL-alanine hydroxamic acids with triacetonamine are chemoselective and afford 1-hydroxy-7,7,9,9-tetramethyl-1,4,8-triazaspiro[4.5]decan-2-one
(3) and (±)-1-hydroxy-3,7,7,9,9-pentamethyl-1,4,8-triazaspiro[4.5]decan-2-one (4), respectively. The X-ray diffraction study showed that compound 3 crystallizes as a solvate with MeCN (1: 1). As shown by ESR measurements, spiro hydroxamic acids 3 and 4 are NO donors in in vitro biological systems. The NO-donor activity of compounds 3 and 4 was found to be substantially higher in the presence of DMSO. Homologue 4 is a stronger NO donor than 3. Compound 4 also exhibits high antimetastatic activity (81%) on the B16-melanoma model. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(13):2157-2166
Three new lanthanide coordination polymers, [Ln(Ad)3/2(Phen)] n ·2nH2O (Ln = Eu, 1; Pr, 2; Ad = adipate; Phen = 1,10-phenanthroline) and [Yb(Ad)3/2(Phen)] n ·nH2O 3, were prepared by hydrothermal reactions. The structures of 1, 2 and 3 are reported. In compound 1, Eu(III) ions are bridged by adipate ligands in two modes into 2-D polymeric layers. Adjacent layers are assembled by hydrogen bonding and π–π stacking between 1,10-phenanthrolines into a 3-D supramolecular structure. Compound 2 is isostructural with 1. In compound 3, the Yb(III) ions are connected by adipate ligands in three modes into a 3-D network. 相似文献
14.
Muhammad Hanif Mukhtiar Hussain Moazzam H. Bhatti Saqib Ali Helen S. Evans 《Structural chemistry》2008,19(5):777-784
Four new complexes, [Ph3Sn(isopropylACDA)] (1), [Ph2SnCl(isopropylACDA)] (2), [Ph3Sn(secbutylACDA)] (3), and [Ph2SnCl(secbutylACDA)] (4), have been prepared from reaction between N-alkylated 2-amino-1-cyclopentene-1-carbodithioic acids (ACDA) with Ph2SnCl2 and Ph3SnCl in 1:1 ratio. All complexes are characterized by FTIR, multinuclear NMR (1H, 13C, and 119Sn) and mass spectrometry. In all complexes, the S–H proton has been removed and coordination takes place through the carbodithioate
moiety. The 119Sn NMR data are consistent with five coordination of tin atom in solution. Complexes 2, 3, and 4 have also been confirmed by single X-ray crystallography. All three crystals are triclinic with space group P − 1. In complexes 2 and 4, the geometry around tin atom is distorted trigonal bipyramidal while in 3 the geometry is in between distorted tetrahedral and trigonal bipyramid. In all three structures, ligands are asymmetrically
coordinated to tin atom. In addition, crystal structures are further stabilized by N–H···S hydrogen bonding. 相似文献
15.
K. Gewald M. Rehwald H. Müller P. Bellmann H. Schäfer 《Monatshefte für Chemie / Chemical Monthly》1995,126(3):341-347
Summary Arylhydrazono acetamides1 react with chloroacetic acid chloride to give N-chloroacetyl derivatives2. Subsequent reaction with pyridines followed by ring closure yield 1-(4-amino-6-oxo-pyridazin-5-yl)-pyridinium chlorides3. Analogously, 1-(6-oxo-pyridazin-5-yl)-pyridinium chloride (5) and 6-oxo-5-pyridinio-pyridazin-4-olate (4) are formed from phenylhydrazono derivatives and pyridine. Treatment of3 and4 with hydrazinium hydrate gives 4,5-diamino-6-oxo-pyridazin-3-carbohydrazides6 and 5-amino-4-hydroxy-pyridazin-6(1H)-one (8). An analogous ring cleavage of3e and5 gives rise to 4,5-diamino- and 5-amino-pyridazin-6(1H)-ones7. On treatment of the pyridinium salts3 with caustic soda in water, nucleophilic addition of the amino group to the pyridinium ring takes place and stable dehydrated products9 are isolated.
Herrn Professor Dr. Fritz Sauter zum 65. Geburtstag gewidmet 相似文献
16.
The structures and stability of pentacoordinate germylenoid PhCH2(OH)CH3GeLiF were first theoretically studied by density functional theory. Two equilibrium structures, the three-membered ring (1a) and the p-complex (1b) structures, were located. Their energy are in the order of 1b > 1a. The Ge-O coordination energies at the B3LYP/6-311+G(d, p) level are 13.6 and 0.2 kJ/mol in 1a and 1b, respectively. The insertion reactions with CH3F indicate that germylenoid PhCH2(OH)CH3GeLiF is more stable than germylene PhCH2(OH)CH3Ge. The insertion barrier of 1a with CH3F is only 3.1 kJ/mol higher than that of PhCH3CH3GeLiF, indicating that the oxygen coordination PhCH2(OH)CH3GeLiF has the same stability as PhCH3CH3GeLiF. 相似文献
17.
N-(6-氯吡啶-3-基)羰基-2-取代芳基磺酰胺的合成、结构及除草活性研究 总被引:4,自引:0,他引:4
通过6-氯吡啶-3-甲酸与2-取代芳基磺酰胺的缩合反应合成了5个N-(6-氯吡啶-3-基)羰基-2-取代芳基磺酰胺化合物3a~3e, 产物结构经元素分析, 1H NMR, IR确证. 由X射线衍射法测定了化合物3a的晶体结构, 该晶体属于三斜晶系, 空间群为 . 以测试除草活性常用的植物玉米、黄瓜和油菜为试材测定了目标化合物的除草活性, 初步试验表明3a~3d有较好的活性, 而且它们对双子叶植物的抑制作用优于对单子叶植物. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(22):3923-3932
Three zinc(II) benzenedicarboxylate coordination polymers, {ZnII(L1)(phen)(H2O)} n (1), {[ZnII(L2)(phen)]2} n (2), and {[ZnII(L3)(phen)(H2O)]} n (3) (L1?=?1,4-benzenedicarboxylic dianion, L2?=?1,3-benzenedicarboxylic dianion, L3?=?1,2-benzenedicarboxylic dianion, and phen?=?1,10-phenanthroline), have been synthesized by self-assembly. Structural analyses of 1–3 reveal that the compounds are one-dimensional (1-D) chains. However, the structural motifs for 1–3 are distinct from each other, where 1 forms 1-D zig-zag chains, 2 is in 1-D ladder-like motif, and 3 is a 1-D helical form. Compounds 1–3 exhibit photoluminescence with emission maxima at ca 371, 392, and 375?nm, respectively. 相似文献
19.
KHSO4-assisted Michael addition–elimination reactions of 2-methylindoles and 1,2-dimethylindoles with 3-dimethylamino-1-phenylprop-2-en-1-ones (2) in water, leading to the formation of 3-(2-methyl-1H-indol-3-yl)-1-arylpropenones (3a–e) and 3-(1,2-dimethy-1H-lindol-3-yl)-1-arylpropenones (3f–j) respectively in good to excellent yields have been reported. However, cyclodehydration of adducts 3a–f to give carbazoles 4 failed to take place under the reaction conditions. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications® to view the free supplemental file. 相似文献
20.
Nynke M. Spijker Jan-Willem Slief Constant A. A. Van Boeckel 《Journal of carbohydrate chemistry》2013,32(8):1017-1041
Abstract The syntheses of several analogues of disaccharide Manot(1→6)Mana-OCH3 (1) and of trisaccharide Mana(1→6)[Mana(1→3)]Mana-OCH3 (2) are reported. The syntheses are described of the diastereomeric 6-methyl derivatives 9a and 9b, which are representatives of fixed conformations of disaccharide 1. The syntheses of the 2-amino-2-deoxy analogues 15 and 17 and the synthesis of the 2-fluoro-2-deoxy analogue 28 are also reported. 相似文献