共查询到20条相似文献,搜索用时 31 毫秒
1.
Vadim A. Pestunovich Nataliya F. Lazareva Alexander I. Albanov 《Monatshefte für Chemie / Chemical Monthly》2006,57(7):1005-1013
The first representative of the N-silylmethylamides of phosphoric acid O=P[NMe(CH2SiMe
n
(OEt)3-n
]3 have been synthesized by interaction of MeNHCH2SiMe
n
(OEt)3-n
(n = 2, 3) with POCl3. The interaction of the N,N′,N″-trimethyl-N,N′,N″-tris[(ethoxydimethyl- silyl)methyl]triamide phosphoric acid with BF3·Et2O or BCl3 results in the formation of the N,N′,N″-trimethyl-N,N′,N″-tris[(fluorodimethyl-silyl)methyl]triamide phosphoric acid or N,N′,N″-trimethyl-N,N′,N″-tris[(chlorodimethylsilyl)methyl]triamide phosphoric acid. NMR data show on the tetracoordinate state of silicon in these
products. 相似文献
2.
Nataliya F. Lazareva Alexander I. Albanov Igor M. Lazarev Vadim A. Pestunovich 《应用有机金属化学》2007,21(4):281-287
The N,N,N′,N′,N″‐pentamethyl‐N″‐(trifluorosilylmethyl)phosphoric triamide O?P(NMe2)2N(Me) CH2SiF3 with intramolecular P?O→Si coordination was formed by the reaction of N,N,N′,N′,N″‐pentamethyl‐N″[(triethoxysilyl)methyl]phosphoric triamide with BF3·Et2O. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
3.
1,3-Bis[(triethoxysilyl)methyl]tetrahydropyrimidin-2-one and 1,3-bis[(dimethoxysilyl)methyl]tetrahydro-pyrimidin-2-one have
been synthesized on interacting urea with N,N′-bis(silylmethyl)propylenamines (EtO)3−nMenSiCH2NH(CH2)3NHCH2SiMen(OEt)3−n (n = 0, 2). Their interaction with boron trichloride has been studied. The structures of all the compounds synthesized have
been demonstrated by multinuclear NMR spectroscopy.
Dedicated to the 50th Anniversary of the Latvian Institute of Organic Synthesis
__________
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 238–244, February, 2007. 相似文献
4.
A new chromone-substituted dihydrotriflavonol, (2S,3S)[6-{(3S) 3″,5″-dihydroxy-6″-methoxydihydrochromone}5,3′,4′,5′-tetrahydroxy-7-methoxy-3-O-8-dihydroflavone]2 3-O-8[6-{(3S) 3″,5″-dihydroxy-6″methoxydihydrochromone}3,5,3′,4′,5′-pentahydroxy-7-methoxydihydroflavonol] was isolated from the leaves
of Anogeissus pendula. The structure was determined by UV, 1H NMR, 13C NMR, HMBC, and CD data. 相似文献
5.
Anna Kamecka Barbara Kurzak Julia Jezierska Agnieszka Wo?na Marcin Broda 《Structural chemistry》2010,21(2):347-355
Solution equilibrium studies on the Cu(II)-polyamine-(aminomethyl)phosphonic acid (glycinephosphonic acid) ternary systems
(polyamine: ethylenediamine (en), diethylenetriamine (dien), N,N,N′,N′,N″-pentamethyldiethylenetriamine (Me5dien)) have been performed by pH-potentiometry, UV–vis spectrophotometry and EPR methods. The obtained results suggest the
formation of the heteroligand complexes with [Cu(A)(Gly(P))] stoichiometry in all studied systems. Additionally, in the systems
with dien the protonated [Cu(dien)(H–Gly(P))]+ species also exists in acid solution and in the system with en the [Cu(en)(Gly(P))H-1]− species is formed in the basic solution. Our spectroscopic results indicate the tetragonal geometry for the [Cu(en)(Gly(P))]
species, the geometry slightly deviated from square pyramidal for the [Cu(dien)(Gly(P))] complex and strongly deviated from
square pyramidal towards trigonal bipyramidal for the [Cu(Me5dien)(Gly(P))] species. The coordination modes in these heteroligand complexes are discussed. 相似文献
6.
Sham K. Vasisht Gursharan Singh Pawan K. Verma 《Monatshefte für Chemie / Chemical Monthly》1986,117(2):177-183
Oxo-Mo(VI) imido-chloride, [MoOCl2(NH)(Et
2O)]
n
and nitrido-chloride, [Mo2O2Cl2(N)2(Et
2O)]
n
have been synthesized by equimolar reactions of MoOCl4 with HN(SiMe
3)2 and LiN(SiMe
3)2, respectively. Higher molar reactions of HN(SiMe
3)2 lead to imido-silylamido derivatives, [Mo2OCl3(NH)3(NHSiMe
3)]
n
, whereas those of LiN(SiMe
3)2 give silylimido bridged compounds, Mo4O4Cl4(NSiMe
3)6 and Mo4O4(NSiMe
3)8. Elemental analyses, redox titration, magnetic moment, molecular weight, molar conductance, infrared,1H-NMR and TG-DTG-DTA studies are reported.
Reaktionen von Bis(trimethylsilyl)amin und -amid mit MoOCl4
Zusammenfassung Durch equimolare Reaktionen von MoOCl4 mit HN(SiMe 3)2 und LiN(SiMe 3)2 wurden die Oxo-Mo(VI) Imido-chloride [MoOCl2(NH)(Et 2O)] n und die Nitrido-chloride [Mo2O2Cl2(N)2(Et 2O)] n dargestellt. Höhermolekulare Reaktionen von HN(SiMe 3)2 führen zu Imido-silylamido Derivaten [Mo2OCl3(NH)3(NHSiMe 3)] n , währenddessen die von LiN(SiMe 3)2 silylimidoüberbrückte Verbindungen ergeben: Mo4O4Cl4(NSiMe 3)6 und Mo4O4(NSiMe 3)8. Die Strukturen sind mit Elementaranalysen, Redoxtitrationen, Messung der magnetischen Momente, Molekulargewichten, molarer Leitfähigkeit, Infrarot,1H-NMR und TG-DTG-DTA-Untersuchungen charakterisiert.相似文献
7.
Goran N. Kaluđerović Tanja M. Vasiljević Mila D. Laušević Akmal S. Gaballa Tibor J. Sabo 《Monatshefte für Chemie / Chemical Monthly》2009,140(5):553-557
Abstract The electrospray mass spectrometric (ESI–MS) behavior of the complexes trans-dichloro(ethylenediamine-N,N′-di-3-propionato)platinum(IV), trans-dibromo(ethylenediamine-N,N′-di-3-propionato)platinum(IV), dichloro(ethylenediamine-N,N′-di-3-propionic acid)platinum(II), tetrachloro(O,O′-di-n-butyl-ethylenediamine-N,N′-di-3-propanoate)platinum(IV), chlorotribromo(O,O′-di-n-butyl-ethylenediamine-N,N′-di-3-propanoate)platinum(IV), and dichloro(O,O′-di-n-butyl-ethylenediamine-N,N′-di-3-propanoate)platinum(II), with the formulae trans-[PtCl2(eddp)] (1), trans-[PtBr2(eddp)] (2), [PtCl2(H2eddp)] (3), [PtCl4(Bu2eddp)] (4), [PtBr3Cl(Bu2eddp)] (5), and [PtCl2(Bu2eddp)]·H2O (6), is reported. The deprotonated molecular ions or halide adducts are usually observed. ESI–MS data demonstrate the usefulness
of the method for efficient characterization of metal complexes in solution.
Graphical Abstract
相似文献
8.
A. L. Kurlovich V. A. Tarasevich N. G. Kozlov 《Russian Journal of Organic Chemistry》2009,45(10):1503-1508
Condensation of 2′-hydroxy-1,1′: 3′,1″-terphenyl-5′-carbaldehyde with naphthalen-1-amine and cyclohexane-1,3-dione, methyl
2,2-dimethyl-4,6-dioxocyclohexane-1-carboxylate, or dimedone gave the corresponding 7-(2′-hydroxy-1,1′: 3′,1″-terphenyl-5′-yl)-7,8,9,10,11,12-hexahydro-12H-benzo[c]acridin-8-ones. The reaction of 2′-hydroxy-1,1′: 3′,1″-terphenyl-5′-carbaldehyde with naphthalen-1-amine and indan-1,3-dione
produced 7-(2′-hydroxy-1,1′: 3′,1″-terphenyl-5′-yl)-8H-benzo[h]indeno[1,2-b]quinolin-8-one. 7-(2′-Hydroxy-1,1′: 3′,1″-terphenyl-5′-yl)-7,8,9,10,11,12-hexahydrobenzo[b][1,10]phenanthrolin-8-ones were obtained by three-component condensation of 2′-hydroxy-1,1′: 3′,1″-terphenyl-5′-carbaldehyde
with quinolin-8-amine and cyclohexane-1,3-dione, methyl 2,2-dimethyl-4,6-dioxocyclohexane-1-carboxylate, or dimedone. 相似文献
9.
Wandee Rakrai Nongnit Morakot Somchai Keawwangchai Chatthai Kaewtong Banchob Wanno Vithaya Ruangpornvisuti 《Structural chemistry》2011,22(4):839-847
The structural geometries of three tripodal thiourea receptors, i.e. 1,3,5-triethyl-2,4,6-tris[(N′-methylthioureido)methyl]benzene (1), tris[N′-methyl-N-(2-aminoethyl)thiourea]methane (2), tris[N′-methyl-N-(2-aminoethyl)thiourea]amine (3), and their complexes with F−, Cl−, Br−, I−, NO3
−, CO3
2−, SO4
2−, HSO4
−, PO4
3−, HPO4
2− and H2PO4
− were obtained using the density functional theory calculations. Electronic and thermodynamic properties of anion binding
complexes of the receptors 1, 2 and 3 were investigated. Recognition abilities of all the receptors in terms of selectivity coefficients are reported. Intermolecular
interactions in all the studied complexes occurring via multi-point hydrogen bonding were found. The receptors 1, 2 and 3 were found to be excellent selectivity for phosphate ion and their binding free energy for the phosphate ion are −292.57,
−291.77 and −295.01 kcal/mol, respectively. 相似文献
10.
In this study, new benzoylthiourea derivatives, (E)-N-[(2-benzamidomethyleneamino)ethylcarbamothioyl]benzamide H3L′, N-(1-(3-benzoylthioureido)propan-2-ylcarbamothioyl)-benzamide H4L″, (E)-N-[4-(benzamidomethyleneamino)phenylcarbamothioyl]benzamide H3L‴, were synthesized. Structures of the compounds were identified by spectroscopic techniques. In addition, all synthesized
compounds were evaluated for in vitro antibacterial and antifungal activity. Compound H3L‴ exhibited antibacterial activity. 相似文献
11.
G. G. Skvortsov M. V. Yakovenko G. K. Fukin E. V. Baranov Yu. A. Kurskii A. A. Trifonov 《Russian Chemical Bulletin》2007,56(3):456-460
The reactions of lanthanide tris(borohydrides) Ln(BH4)3(thf)3 (Ln = Sm or Nd) with 2 equiv. of lithium N,N′-diisopropyl-N′-bis(trimethylsilyl)guanidinate in toluene produced the [(Me3Si)2NC(NPri)2]Ln(BH4)2Li(thf)2 complexes (Ln = Sm or Nd), which were isolated in 57 and 42% yields, respectively, by recrystallization from hexane. X-ray
diffraction experiments and NMR and IR spectroscopic studies demonstrated that the reactions afford monomeric ate complexes, in which the lanthanide and lithium atoms are linked to each other by two bridging borohydride groups. The complexes
exhibit catalytic activity in polymerization of methyl methacrylate.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 441–445, March, 2007. 相似文献
12.
Andrea Melchior Marilena Tolazzi Silvia Del Piero 《Journal of Thermal Analysis and Calorimetry》2011,103(1):35-40
The complex formation of Cd(II) with N-donor ligands in dimethylsulfoxide (DMSO) is investigated by means of potentiometry
and titration calorimetry. The ligands considered in this work are tripodal polyamines and polypyridines: 2,2′,2″-triaminotriethylamine
(TREN), tris(2-(methylamino)ethyl)amine (Me3TREN), tris(2-(dimethylamino)ethyl)amine (Me6TREN), tris[(2-pyridyl)methyl]amine (TPA) and 6,6′-bis-[bis-(2-pyridylmethyl)aminomethyl]-2,2′-bipyridine (BTPA). These ligands
are characterized by a systematic modification of the donor groups to relate their structure to the thermodynamics of the
complexes formed. The TREN and Me3TREN ligands form highly stable species. The stability of the complex formed with the fully methylated Me6TREN is much lower than with other polyamines and the enthalpic and entropic terms suggest an incomplete coordination to the
metal ion. In general, the TPA ligand forms complexes less stable than TREN and Me3TREN as a result of the combination of higher structural rigidity of TPA and lower basicity of pyridine moiety with respect
to primary and secondary amines. Pyridine-containing ligands display, in general, a less unfavorable formation entropy than
tripodal polyamines here considered. In particular, TPA forms a more stable 1:1 species with respect to Me6TREN due to the entropic term, being the enthalpy less negative. The ligand BTPA is able to form only a monometallic complex,
where the metal ion is likely to be encapsulated as indicated by the obtained thermodynamic parameters. 相似文献
13.
A. V. Velikorodov A. K. Kuanchalieva O. L. Titova 《Russian Journal of Organic Chemistry》2010,46(7):1060-1065
Oximation of indoles having a methoxycarbonylamino group on C5 and an acyl group on C3 with hydroxylamine hydrochloride in the presence of pyridine gave the corresponding oximes. The reduction of the 3-C=O group
with sodium tetrahydridoborate in the presence of sodium hydroxide was accompanied by removal of the methoxycarbonyl group
at the pyrrole nitrogen atom with formation of racemic alcohols. 1,4-Addition of 1-(pyridin-3-yl)butane-1,3-dione to dimethyl
1,4-benzoquinone diimine N,N′-dicarboxylate in dioxane in the presence of sodium methoxide, followed by heating in boiling 22% hydrochloric acid, afforded
methyl 2-methyl-5-(methoxycarbonylamino)-3-(pyridin-3-ylcarbonyl)-1H-indole-1-carboxylate. 3-(Dimethylamino)-1-(4-methyl-1,2,5-oxadiazol-3-yl)prop-2-en-1-one reacted with N,N′-bis(methoxycarbonyl)- and N,N′-bis(phenylsulfonyl)-1,4-benzoquinone diimines in methylene chloride and acetic acid, respectively, in the presence of BF3 · Et2O to produce indoles having a 1,2,5-oxadiazolylcarbonyl group on C3. 相似文献
14.
The new hexaalkylborazine chromium tricarbonyls (n-Pr)3B3N3Me3Cr(CO)3 (V), Me3B3N3(n-Pr)3Cr(CO)3 (VI), (i-Pr)3B3N3Me3Cr(CO)3 (VII) and Me3B3N3(i-Pr)3Cr(CO)3 (VIII) have been prepared from fac-Cr(CO)3(MeCN)3 and the corresponding borazine in dioxane or without solvent. They are much more labile than the isomeric complex Et3B3N3Et3Cr(CO)3 (IV) which can be readily obtained from Et3B3N3Me3Cr(CO)3 and Et3B3N3Et3 by ring ligand exchange. The NMR., IR., UV. and Mass spectroscopic data of the complexes IV–VIII will be briefly discussed. The preparation of the borazine derivatives (n-Pr)3B3N3Me3 (IX) and Me3B3N3(n-Pr)3 (X) is also reported. 相似文献
15.
The resol polycondensation ofC-phenylcalix[4]resorcinarene with formaldehyde affords a corss-linked polymer possessing ion-exchange ability. The ion-exchange
capacity of the polymer with respect to NH4
+, Me4N+, Et4N+, Bu4N+, and K+ cations was determined. The equilibrium in the systemsC-phenylcalix[4]resorcinarene-based polymer—binary or ternary aqueous solutions of electrolytes was studied by potentiometric
titration and quantumchemical MNDO/PM3 calculation
Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1475–1477, August, 2000. 相似文献
16.
A zwitterionic trichloroplatinum(II) complex PtCl3(4,4′-bpy-N-nBu) (1) was prepared by an aqueous reaction of [4,4′-bpy-N-nBu]Cl with K2PtCl4, and was characterized by 1H-n.m.r. and IR spectroscopy as well as elemental analysis. Dissolving (1) into dmso-d
6 at 25 °C yields a mixture of the complexes, cis-PtCl2(4,4′-bpy-N-nBu)(dmso-d
6) (2-cis), trans-PtCl2(4,4′-bpy-N-nBu)(dmso-d
6) (2-trans), [4,4′-bpy-N-nBu]Cl and PtCl2(dmso-d
6)2. Ratio of the products in the dmso-d
6 solution changed depending on the temperature and the total concentration of the complexes. These compounds are in equilibrium
via isomerization reaction between (2-cis) and (2-trans) and via displacement reaction of the alkylbipyridinium ligand of
(2-cis) and (2-trans) with dmso-d
6 to form [4,4′-bpy-N-nBu]Cl and PtCl2(dmso-d
6)2. 相似文献
17.
Solution equilibrium studies on Cu2+–L1–L2 ternary systems have been performed by pH-potentiometry, UV–Vis spectrophotometry and EPR methods (L1 corresponds to polyamines such as ethylenediamine (en), diethylenetriamine (dien), or N,N,N′,N′,N″-pentamethyldiethylenetriamine (Me5dien) and L2 represents 1-aminoethylphosphonic acid (α-alaninephosphonic acid)). The obtained results suggest the formation of heteroligand complexes with [Cu(L1)(α-Ala(P))] stoichiometry in all studied systems. Additionally, in the system with en the [Cu(en)(α-Ala(P))H−1]− species is formed in basic solution. Our spectroscopic results indicate tetragonal geometry for the [Cu(en)(α-Ala(P))] species, geometry slightly deviated from square pyramidal for the [Cu(dien)(α-Ala(P))] complex and strongly deviated from square pyramidal towards trigonal bipyramidal for the [Cu(Me5dien)(α-Ala(P))] species. The coordination modes in these heteroligand complexes are discussed. 相似文献
18.
Silvia Del Piero Rosalisa Fedele Andrea Melchior Pierluigi Polese Roberto Portanova Marilena Tolazzi 《Journal of solution chemistry》2008,37(4):543-551
The thermodynamic functions of the complexation of Ag(I) by the tripodal ligands, tris(2-(methylamino)ethyl)amine (Me3tren) and tris(2-(dimethylamino)ethyl)amine (Me6tren) (L), are determined in dimethyl sulfoxide (DMSO) by potentiometric and calorimetric techniques at 298.0 K and 0.1 mol⋅dm−3 ionic strength (Et4NClO4). A comparison is made between previous data concerning Ag(I) complex formation with the non-alkylated tripodal 2,2′,2″-triaminotriethylamine
(tren), in order to analyze the influence of N-methylation on this type of branched donor, and with those relative to the
linear triethylenetetramine (trien) and 1,1,4,7,10,10-hexamethyltriethylenetetramine (Me6trien). The results are discussed taking into account different σ-donating properties, geometric arrangement of the ligands, steric repulsions and solvation effects. 相似文献
19.
B. Venkateswara Rao 《Journal of Thermal Analysis and Calorimetry》2010,100(2):577-587
Co(II), Ni(II), Cu(II) and Cd(II) chelates with 1-aminoethylidenediphosphonic acid (AEDP, H4L1), α-amino benzylidene diphosphonic acid (ABDP, H4L2), 1-amino-2-carboxyethane-1,1-diphosphonic acid (ACEDP, H5L3), 1,3-diaminopropane-1,1,3,3-tetraphosphonicacid (DAPTP, H8L4), ethylenediamine-N,N′-bis(dimethylmethylene phosphonic)acid (EDBDMPO, H4L5), O-phenylenediamine-N,N′-bis(dimethyl methylene phosphonic)acid (PDBDMPO, H4L6), diethylene triamine-N,N,N′,N′,N″N″-penta(methylene phosphonic)acid (DETAPMPO, H10L7) and diethylene triamine-N,N″-bis(dimethyl methylene phosphonic)acid (DETBDMPO, H4L8) have been synthesised and were characterised by elemental and thermal analyses as well as by IR, UV–VIS, EPR and magnetic
measurements. The first stage in the thermal decomposition process of these complexes shows the presence of water of hydration,
the second denotes the removal of the coordinated water molecules. After the loss of water molecules, the organic part starts
decomposing. The final decomposition product has been found to be the respective MO·P2O5. The data of the investigated complexes suggest octahedral geometry with respect to Co(II) and Ni(II) and tetragonally distorted
octahedral geometry with respect to Cu(II). Antiferromagnetism has been inferred from magnetic moment data. Infrared spectral
studies have been carried out to determine coordination sites. 相似文献
20.
Ingrida Tumosien? Zigmuntas Jonas Beresnevi?ius 《Monatshefte für Chemie / Chemical Monthly》2009,43(9):1523-1528